P-chirogenic organophosphorus compounds

Abstract

P-chirogenic organophosphorus compounds of general formula (I), a process for the synthesis of the compounds of formula (I), and intermediate products of general formulae (II), (III) and (IV), as shown below, are involved in the synthesis of compounds (I). ##STR00001## Metal complexes comprising compounds (I) as ligands are also described. The compounds and complexes are useful in asymmetric catalysis by transition metal complexes or organocatalysis, especially for asymmetric hydrogenation or allylation. Compounds of general formula (I) may be useful as agrochemical and therapeutic substances, or as reagents or intermediates for fine chemistry.

Claims

1. A process for producing a compound of formula (I) ##STR00048## wherein R1 and R2 may be the same or different and represent each a substituted or unsubstituted group selected from alkyl, cycloalkyl, aryl, alkyloxy, cycloalkyloxy, aryloxy, alkylamino, cycloalkylamino, arylamino, and metallocenyl; R3, R4, R5, R6 may be the same or different and represent each a hydrogen atom or a substituted or unsubstituted group selected from the group consisting of alkyloxy, cycloalkyloxy, aryloxy, alkylamino, cycloalkylamino, and arylamino; E represents a substituted or unsubstituted group BR9R10; wherein R9 and R10 may be the same or different and represent each an halogen, an hydroxyl, a substituted or unsubstituted group selected from the group consisting of alkyloxy, aryloxy, cycloalkyloxy, alkyl cycloalkyl and aryl; comprising (i) reacting chlorophosphine borane (VII) ##STR00049## wherein R1 and R2 are as defined above, with a reagent RM, in which M is Li and R is an alkyl or an aryl group; and further reacting the product of this halogen-metal exchange with an aromatic compound of formula (VI) ##STR00050## wherein X and Y may be the same or different and each represent F, Cl, Br, or I, and R3, R4, R5and R6 are as defined above, resulting in the corresponding P-chirogenic phosphine borane of formula (IV) ##STR00051## wherein X, R1, R2, R3, R4, R5 and R6 are as defined above; wherein step (i) is carried out under cooling condition, at a temperature ranging from 110 C. to 10 C.; and (ii) performing two chemical transformations on compound (IV) leading to compound (I): a step (ii-a) of removing of the borane group and a step (ii-b) of coupling of an electrophilic reagent, which is a boronate reagent, on the ortho position; steps (ii-a) and (ii-b) being carried out in any order.

2. The process according to claim 1, wherein compound (VII) is chiral.

3. The process according to claim 1, wherein compound (IV) first reacts under conditions of step (ii-a) leading to intermediate compound of formula (II), ##STR00052## wherein R1, R2, R3, R4, R5, R6 and X are as previously defined.

4. The process according to claim 1, wherein compound (IV) first reacts under conditions of step (ii-b) leading to intermediate compound of formula (III), ##STR00053## wherein R1, R2, R3, R4, R5, R6 and E are as previously defined.

Description

DETAILED DESCRIPTION

(1) It is appreciated that in any of the mentioned reactions, any reactive group in the substrate molecules may be protected according to conventional chemical practice. Suitable protecting groups in any of the mentioned reactions are those used conventionally in the art. The methods of formation and removal of such protecting groups are those conventional methods appropriate to the molecule being protected.

(2) Step (i)Synthesis of Compound (IV) from Chlorophosphine Borane (VII)

(3) ##STR00018##

(4) Synthesis of compound (IV), involves a halogen metal exchange that is followed by a reaction with an aromatic compound of general formula (VI):

(5) ##STR00019##
wherein R1, R2, R3, R4, R5, R6 and X are as defined above.

(6) In an embodiment, compound of general formula (VII) is such that R1 is phenyl, cyclohexyl, methyl, i-propyl, o-tolyl, o-anisyl, metallocenyl and R2 is as described above; in a preferred aspect of this embodiment, R2 is also phenyl, cyclohexyl, methyl, i-propyl, o-tolyl, o-anisyl, ferrocenyl, and R1 and R2 are identical or different.

(7) According to a preferred embodiment, reagent RM is t-BuLi.

(8) In another embodiment, compound of general formula (VI) is such that X is Br, or I and Y is Br or I. According to one embodiment, groups X and Y of compound (VI) are the same. According to a preferred embodiment, X and Y are both bromine atoms. According to another embodiment, X and Y are iodine atoms. In these embodiments, R3, R4, R5 and R6 preferably are H or methyl; more preferably, R4 and/or R5 is methyl and the others are H. According to a specific embodiment, compound (VI) is 1,2-dibromobenzene.

(9) In another embodiment, compound of general formula (IV) is such that X is Br or I, preferably Br, R1 is phenyl, cyclohexyl, methyl, i-propyl, o-tolyl, o-anisyl, ferrocenyl and R2 represent each a substituted or unsubstituted group selected from alkyl, cycloalkyl, aryl, alkyloxy, cycloalkyloxy, aryloxy, alkylamino, cycloalkylamino, arylamino, ferrocenyl group, provided that when R1 is Me, R2 is not tBu; preferably R2 is phenyl, cyclohexyl, methyl, i-propyl, o-tolyl, o-anisyl, ferrocenyl; R1 and R2 are identical or different; R3, R4, R5 and R6 preferably are H or methyl; more preferably, R4 and/or R5 is methyl and the others are H.

(10) According to one embodiment, step (i) is carried out under cooling conditions, at a temperature ranging from 110 C. to 10 C., preferably from 90 C. to 60 C., and even more preferably at 78 C.

(11) According to one embodiment, halogen metal exchange is carried out in presence of reagent RM, in which M is a metal, preferably Li and R is an alkyl or an aryl group. In a preferred embodiment, RM reagent is tBuLi.

(12) According to an embodiment, RM reagent is in solution in pentane, heptane or THF. In another embodiment, the concentration of RM reagent is ranging from 1.0 to 2.0M and preferably at 1.6 M.

(13) According to one embodiment, halogen metal exchange is carried out in presence of 2 to 6 equivalents, preferably of 2 to 3 equivalents of RM reagent and even more preferably of 2.4 equivalents of RM reagent.

(14) According to one embodiment, the solvent used during the subsequent addition of aromatic reagent of general formula (VI) is selected from the group comprising tetrahydrofuran, ether, dimethylether, dioxane, benzene, toluene, xylenes, dimethylsulfoxide or a mixture of these ones. According to a preferred embodiment, the solvent used is tetrahydrofuran.

(15) According to an embodiment, compound (IV) is obtained without racemization. According to one embodiment, compound (IV) is obtained with an enantiomeric excess ranging from 0 to 100%, preferably from 85 to 100%.

(16) Synthesis of Chlorophosphine Borane (VII) by Acidolysis of Aminophosphine Borane (VIII)

(17) ##STR00020##

(18) According to one embodiment, compound (VII) may be obtained by an acidolysis of compound of general formula (VIII)

(19) ##STR00021## wherein R1 and R2 are as defined above.

(20) In one embodiment, the process of the invention comprises a preliminary step of acidolysis of compound (VIII) leading to compound (VII).

(21) According to one embodiment, the acydolysis of compound (VIII) is carried out in presence of 2 to 20 equivalents, preferably of 4 to 16 equivalents and event more preferably 4.0 equivalent of acid reagent.

(22) According to one embodiment, the solvent used in the acidolysis is selected from the group comprising tetrahydrofuran, ether, dimethylether, dioxane, benzene, toluene, xylenes, dimethylsulfoxide or a mixture of these ones. According to a preferred embodiment, the solvent used in the acidolysis step is toluene.

(23) According to one embodiment, the acid used for the acidolysis is an acid selected from the group comprising H.sub.2SO.sub.4/NaCl, HBr gas, HI, MsOH, TsOH, a solution of dry HCl or a mixture thereof.

(24) According to one embodiment, dry HCl is in solution in a solvent selected in the group comprising toluene, diethylether, dioxane, cyclopentylmethyl ether, ethyl acetate, methanol, ethanol, 2-propanol, butanol and acetic acid. In a preferred embodiment, dry HCl is dissolved in toluene.

(25) In an embodiment, the acidolysis is performed preferably at 20 C.

(26) In an embodiment, intermediate compound (VII) is isolated after filtrating the reaction mixture and removing half of the solvent under reduced pressure.

(27) In one embodiment, compound (VII) is obtained without racemization. According to one embodiment, compound (VII) is obtained with an enantiomeric excess ranging from 0 to 100%, preferably from 85 to 100%.

(28) Alternative Route of Synthesis of Compound (IV)

(29) In one embodiment, step (i) further comprises a first intermediate step (a) of protonation of the product of the halogen-metal exchange leading to compound (V)

(30) ##STR00022## wherein R1 and R2 may be the same or different and represent each a substituted or unsubstituted group selected from alkyl, cycloalkyl, aryl, alkyloxy, cycloalkyloxy, aryloxy, alkylamino, cycloalkylamino, arylamino, metallocenyl group, provided that when R1 is Me or tBu, R2 is not tBu or Me respectively;
and further comprises a second intermediate step (b) of reaction of compound (V) with a reagent RM in which M is a metal, preferably Li or a magnesium organic compound MgZ wherein Z is halide, and R is an alkyl or an aryl group,
before further reacting this intermediate compound with compound (VI).

(31) This alternative step (i) is represented on the scheme below:

(32) ##STR00023##

(33) One interest of this alternative route of synthesis is that compound (V) may be purified. This is especially interesting in the case wherein compound (VII) is obtained from compound (VIII) as described above.

(34) According to one embodiment, the process of the present invention comprises further intermediate steps (a) and (b) and compounds (VII), (V), (IV) and (I) are such that when R1 is Me or tBu, then R2 is not tBu or Me respectively.

(35) Without willing to be bound to a theory, it is suggested that compound (VI) forms in situ a benzyne intermediate in presence of the organometallic reagent RM. It is thought that benzyne intermediate is obtained by an exchange between groups X and Y of compound (VI) and the metal M, followed by the elimination of MX and MY. At the same time, compound (V) is deprotonated by the organometallic reagent RM to form the corresponding anion. The very electrophile benzyne then reacts with the deprotonated compound (V) to form the corresponding o-metallated phosphine borane which converts into (IV) by another exchange between metal and group X.

(36) In an embodiment, compound of general formula (V) is such that R1 is phenyl, cyclohexyl, methyl, i-propyl, o-tolyl, o-anisyl, metallocenyl and R2 is as described above; in a preferred aspect of this embodiment, R2 is also phenyl, cyclohexyl, methyl, i-propyl, o-toluene, o-anisyl, ferrocenyl, and R1 and R2 are identical or different.

(37) According to a preferred embodiment, reagent RM is nBuLi.

(38) In another embodiment, compound of general formula (VI) is such that X is Br, or I and Y is Br or I. According to one embodiment, groups X and Y of compound (VI) are the same. According to a preferred embodiment, X and Y are both bromine atoms. According to another embodiment, X and Y are iodine atoms. In these embodiments, R3, R4, R5 and R6 preferably are H or methyl; more preferably, R4 and/or R5 is methyl and the others are H. According to a specific embodiment, compound (VI) is 1,2-dibromobenzene.

(39) In another embodiment, compound of general formula (IV) is such that X is Br or I, preferably Br, R1 is phenyl, cyclohexyl, methyl, i-propyl, o-tolyl, o-anisyl, ferrocenyl and R2 represent each a substituted or unsubstituted group selected from alkyl, cycloalkyl, aryl, alkyloxy, cycloalkyloxy, aryloxy, alkylamino, cycloalkylamino, arylamino, ferrocenyl group, provided that when R1 is MeR2 is not tBu; preferably R2 is phenyl, cyclohexyl, methyl, i-propyl, o-tolyl, o-anisyl, ferrocenyl; R1 and R2 are identical or different; R3, R4, R5 and R6 preferably are H or methyl; more preferably, R4 and/or R5 is methyl and the others are H.

(40) According to one embodiment, step (i) is usually carried out under cooling conditions, at a temperature ranging from 90 C. to 50 C., preferably from 78 C. to 60 C.

(41) According to one embodiment, step (i) is usually carried out in presence of 0.5 to 3 equivalents, preferably of 1.1 to 1.2 equivalents of RM reagent.

(42) According to one embodiment, the solvent used in step (i) is selected from the group comprising tetrahydrofuran, ether, dimethylether, dioxane, benzene, toluene, xylenes, dimethylsulfoxide or a mixture of these ones. According to a preferred embodiment, the solvent used in step (i) is tetrahydrofuran.

(43) According to one embodiment, intermediate compound (IV) is purified by using chromatographic techniques or by recrystallization.

(44) According to one embodiment, compound (IV) is obtained with an enantiomeric excess ranging from 0 to 100%, preferably from 85 to 100%.

(45) According to one embodiment, compound (IV) is obtained without racemization, preferably with an enantiomeric excess of more than 85%, preferably of more than 90%.

(46) Step (ii)Synthesis of Compound (I) from Compound (IV)

(47) Step (ii-a)Removing of Borane Group

(48) ##STR00024##

(49) Synthesis of compound (I) from intermediate compound (III) and synthesis of intermediate compound (II) from intermediate compound (IV), by step (ii-a), involve the deprotection of the phosphorus atom by removing of the borane protective group.

(50) According to one embodiment, removing of the borane group by step (ii-a) is carried out by classical methods of removal of the borane group. According to a preferred embodiment, removing of the borane group by step (ii-a) is achieved using 1,4-diazabicyclo[2.2.2]octane (DABCO) as reactive agent according to the procedure described in Brisset H., Gourdel Y., Pellon P. and Le Corre M., Tetrahedron Lett., 1993, 34, 4523-4526. According to another embodiment, removing of the borane group by step (ii-a) is carried out by warming compound (III) in ethanol, amines or olefines, and recrystallizing of the resulting compound (I).

(51) According to one embodiment, removing of the borane group by step (ii-a) occurs without racemization.

(52) In an embodiment, compound (II) is obtained using a one pot procedure starting from compound (VIII), i.e. without isolating intermediate compounds (VII) and (IV).

(53) Step (ii-b)Electrophilic or Oxidative Coupling

(54) ##STR00025##

(55) Synthesis of compound (I) from intermediate compound (II) and synthesis of intermediate compound (III) from intermediate compound (IV), by step (ii-b), involve an electrophilic coupling or an oxidative coupling optionally followed by an electrophilic coupling.

(56) According to one embodiment, step (ii-b) involves an organometallic agent RM and an electrophilic agent. According to another embodiment, step (ii-b) involves an organometallic agent RM and an oxidative agent. According to a further embodiment, step (ii-b) involves an organometallic agent RM, an oxidative agent and an electrophilic agent.

(57) According to one embodiment, the organometallic agent RM is selected from the group comprising nBuLi, sBuli, tBuLi, PhLi, Grignard reagents such as i-PrMgCl. According to a preferred embodiment, the organometallic agent RM is nBuLi, According to one embodiment, the electrophilic agent is selected from the group comprising boron reagents, aldehydes, ketones, acyl chlorides, halosilanes, haloalkanes, halophosphines, phosphinites, Michael acceptors such as ,-insaturated ester, ,-insaturated ketones, ,-insaturated phosphine derivatives. According to a preferred embodiment, the electrophilic agent is selected from the group comprising ClB(c-Hex).sub.2, PhCHO, tBuCHO, tBuCOCl, (Me).sub.3SiCl, (Me).sub.2SiCl.sub.2, MeI, ClP(Ph).sub.2, ClP(c-Hex).sub.2, ClP(i-Pr).sub.2, ClP(o-Tol).sub.2, ClP(p-Tol).sub.2, ClP(p-CF.sub.3Ph).sub.2, PhOP(Ph)(o-Tol), PhOP(Ph)(o-An).

(58) According to one embodiment, the oxidative agent is selected from the group comprising transition metal salts, transition metal complexes, wherein the metal is selected from the group comprising iron, copper, cerium, palladium. According to a preferred embodiment, the oxidative agent is selected from the group comprising Fe(acac).sub.3, FeCl.sub.3, Cu(AcO).sub.2. Without willing to be bound to a theory, it is suggested that reactive group X of compound (IV) or (II) is exchanged with the metal of the organometallic agent RM. Reaction of the resulting anion with an electrophilic agent then leads to the production of compound of the general formula (I) or (III). The anion may also reacts with a metal salt to produce the transmetallation adduct to afford the homocoupling product (III), (I) or (I) by oxidative coupling, or the ortho-substituted compounds (III) or (I) by reaction with an electrophilic reagent. When the anion obtained from compound (IV) or (II) is first reacted with an oxidative agent with an excess of compound (IV) or (II), homocoupling reaction may occur, leading to diphosphinic derivatives with a biphenyl bridge of formula (I).

(59) According to an embodiment, no homocoupling reaction occurs in the present invention.

(60) According to one embodiment, step (ii-b) is usually carried out at a temperature ranging from 90 C. to 50 C., preferably from 78 C. to 20 C.

(61) According to one embodiment, the solvent used in step (ii-b) is selected from the group comprising tetrahydrofuran, ether, dimethylether, dioxane, benzene, toluene, xylene, dimethylsulfoxide or a mixture of these ones. According to a preferred embodiment, the solvent used in step (ii-b) is tetrahydrofuran.

(62) Use of Compounds (I) in Asymmetric Catalysis

(63) Compounds (I) of the present invention are useful in asymmetric catalysis by transition metal complexes or organocatalysis. Especially, compounds (I) may be used in catalyzed asymmetric reactions such as hydrogenation, allylation, CC bond formation, hydroformylation or carbonylation reactions.

(64) According to one embodiment, compound (I) is used as a ligand of a transition metal such as rhodium or palladium, ruthenium, iridium. Complexes of transition metal according to this embodiment may be suitable for asymmetric catalyzed reactions, preferably in allylation or hydrogenation reactions.

(65) Intermediates compounds (II), (III) and (IV) may also be useful in asymmetric catalysis by transition metal complexes, organocatalysis or stereoselective synthesis.

EXAMPLES

(66) The present invention is further illustrated by the following examples which are provided by way of illustration only and should not be considered to limit the scope of the invention.

(67) A. Generalities

(68) Material and Methods

(69) All reactions were carried out under an Ar atmosphere in dried glassware. Solvents were dried and freshly distilled under an Ar atmosphere over sodium/benzophenone for THF, diethylether, toluene and benzene, CaH.sub.2 for CH.sub.2Cl.sub.2. Hexane and isopropanol for HPLC were of chromatography grade and used without further purification. s-Butyllithium (1.4M in cyclohexane), t-butyllithium (1.6M in pentane), isopropyllithium (0.7M in pentane), ferrocene, 2-bromoanisole, methyl iodide, BH.sub.3.SMe.sub.2, 1,4-diazabicyclo[2.2.2]octane (DABCO), 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, were purchased from Aldrich, Acros or Alfa Aesar, and used as received. (+)- and ()-ephedrine were purchased from Aldrich and dried by azeotropic shift of toluene on rotary evaporator. The toluenic HCl solution (0.2-0.4 M) was obtained by bubling HCl gas in toluene and titrated by acidimetry before use. The (2S,4R,5S)-()-3,4-dimethyl-2,5-diphenyl-1,3,2-oxazaphospholidine-2-borane and its enantiomer (2R,4S,5R)-(+), were prepared from the appropriate (+)- or ()-ephedrine, as previously described (S. Jug, Phosphorus, Sulfur and Silicon & Related Compounds, 2008, 183(2-3), 233-248; Darcel C., Uziel J. and Jug S., Phosphorus Ligands in Asymetric Catalysis and Applications, A. Bmrner (Ed.), 208, Wiley-VCH; Chaux F., Frynas S., Laureano H., Salomon C., Morata G., Auclair M-L., Stephan M., Merds R., Richard P., Ondel M-J., Henry J. C., Bayardon J., Darcel C., Jug S., C. R. Chimie, 2010, 13, 1213-1226).

(70) Chiral HPLC analysis were performed on SHIMADZU 10-series apparatus, using chiral columns (Chiralcel OD-H, Chiralcel AD, Chiralcel OJ, Lux 5-cellulose-2), and with hexane/propan-2-ol mixtures as the mobile phase (Flow rate 1 mL.Math.min.sup.1; UV detection =254 nm). Thin layer chromatography (TLC) was performed on 0.25 mm E. Merck precoated silica gel plates and exposed by UV, potassium permanganate or iodine treatment. Flash chromatography was performed with the indicated solvents using silica gel 60 A, (35-70 m; Acros) or aluminium oxide 90 standardized (Merck). All NMR spectra data were recorded on BRUKER AM 250, 300 AVANCE, 500 AVANCE DRX and 600 AVANCE II spectrometers at ambient temperature. Data are reported as s=singlet, d=doublet, t=triplet, q=quartet, m=multiplet, brs=broad singlet, brd=broad doublet, dhept=doublet of heptuplet, coupling constant(s) in Hertz. Melting points were measured on a Kofler bench melting point apparatus and are uncorrected. Optical rotations values were recorded at 20 C. on a Perkin-Elmer 341 polarimeter, using a 10 cm quartz vessel. Infrared spectra were recorded on a Bruker Vector 22 apparatus. Mass and HRMS spectra were recorded on Mass, Bruker ESI micro TOF-Q apparatus, at the Universit de Bourgogne (Dijon). The major peak m/z was mentioned with the intensity as a percentage of the base peak in brackets. Elemental analyses were measured with a precision superior to 0.3% at the Microanalysis Laboratories of the Universits P. & M. Curie (Paris) and Bourgogne (EA 1108 CHNS-O FISONS Instrument). X-Ray analyses were performed at the Universit de Bourgogne, and the data were collected at 115 K on a Bruker Nonius Apex II CCD system using graphite-monochromated Mo-K radiation. The structures were solved by direct methods (SIR92) and refined with full-matrix least-squares methods based on F.sup.2 (SHELXL-97) with the aid of the WINGX program. All non-hydrogen atoms were refined with anisotropic thermal parameters. Hydrogen atoms were either included in theirs calculated positions or found in Fourier difference maps (CH.sub.3 and BH.sub.3).

(71) A.1. Preparation of Aminophosphine Boranes

(72) Preparation of Organolithium Reagents

(73) Aryllithium reagents by metal-halogen exchange: In a two necked-flask equipped with a magnetic stirrer and an argon inlet, 1 equiv. of sec-butyllithium is added. The mixture is cooled to 0 C. and 1 equiv. of 2-bromoanisole is slowly added with a syringe while stirring. After the formation of a white precipitate, the mixture is stirred for 1 h at 0 C. The organolithium reagent is dissolved with a minimum of dry THF before use.

(74) Preparation of Ferrocenyllithium by Deprotonation of the Ferrocene

(75) A 250 mL three-necked flask equipped with a magnetic stirrer under an argon atmosphere was charged with ferrocene (0.74 g, 4 mmol) and THF (10 mL). At 0 C., t-BuLi (2.75 mL, 1.6 M in hexane, 4.4 mmol) was added dropwise, and the reaction mixture was stirred at 0 C. for 1 h, before use.

(76) General procedure

(77) In a 100 mL three-necked flask, equipped with a magnetic stirrer and an argon inlet, 5 mmol of the oxazaphospholidine borane complex were dissolved in 5 mL of anhydrous THF. The mixture was cooled at 78 C. and 2 equiv. (10 mmol) of the organolithium reagent were slowly added. The resulting mixture was stirred and warmed to 0 C. (or RT) until the starting material had completely reacted. The reaction was monitored by TLC over silica (CH.sub.2Cl.sub.2 as eluent), and was finally hydrolyzed at 0 C. with 2 mL of water. The THF was removed under reduced pressure and the aqueous layer was extracted several times with dichloromethane. The combined organic phases were dried over MgSO.sub.4 and the solvent was removed. The residue was purified on a short column of silica gel, using a mixture of toluene/AcOEt 95:5 as eluent, to afford the aminophosphine boranes. The aminophosphine boranes can be recrystallized using a mixture hexane/isopropanol 7:3.

(78) The (S.sub.p)-(+)-N-methyl-N-[(1R,2S)(1-hydroxy-2-methyl-1-phenyl-2-propyl)]amino-o-anisylphenyl phosphine borane were prepared from the ()-ephedrine according to the published procedure.

(Sp)-(+)-N-methyl-N-[(1R,2S)(1-hydroxy-1-phenyl-prop-2-yl]aminoferrocenylphenyl phosphine borane

(79) Yield=80%; Orange crystals; [].sub.D.sup.20=+113.9 (c 1.0, CHCl.sub.3); R.sub.f=0.62 (toluene/EtOAc (9:1)); IR (KBr, cm.sup.1): 3500 (OH), 2372 (BH), 1455, 1437, 1386, 1367, 1217, 1163, 1106, 1063, 1022, 998, 956, 884, 822, 763, 746, 721, 698, 646, 614; .sup.1H NMR (CDCl.sub.3, 300.13 MHz) 0.20-2.00 (m, 3H), 0.91 (d, J=6.3 Hz, 3H), 2.05 (brs, 1H), 2.38 (d, J=8.4 Hz, 3H), 4.16-4.25 (m, 1H), 4.23-4.27 (m, 1H), 4.30 (brs, 5H), 4.51 (d, J=11.7 Hz, 2H), 4.58-4.62 (m, 1H), 4.87 (d, J=5.7 Hz, 1H), 7.28-7.46 (m, 10H); .sup.31P NMR (CDCl.sub.3, 121.5 MHz) +70.7 (m); .sup.13C NMR (CDCl.sub.3, 75.0 MHz) 13.7, 31.3, 40.3, 58.4 (d, J=10.6 Hz), 70.9, 71.9, 73.0, 79.6, 127.3, 128.4, 128.8, 128.9, 129.1, 131.1, 132.2 (d, J=9.8 Hz), 143.3; Anal. calcd for C.sub.26H.sub.31BFeNOP (471.17): C, 66.28; H, 6.63; N, 2.97. found: C, 66.33; H, 6.83; N, 3.02.

(Rp)-()-N-methyl-[(1R,2S)(2-hydroxy-1-phenyl)ethyl]-aminocyclohexylphenyl-phosphine borane

(80) Yield=87%; White crystals; m.p. 98 C.; [].sup.20.sub.D=28.5 (c=0.7, CHCl.sub.3); R.sub.f=0.26 (toluene). IR (KBr, cm.sup.1) 3538 (OH), 3029-2857 (CH), 2369 (BH), 1492, 1452, 1436, 1368, 1257, 1221, 1159, 1109, 1086, 1000, 961, 887, 758, 742, 695; .sup.1H NMR (CDCl.sub.3) (ppm) 0.10-1.60 (m, 3H, BH.sub.3), 1.15 (d, 3H, .sup.3J.sub.HH=6.9, CCH.sub.3), 1.20-1.90 (m, 10H, CH.sub.2), 2.27-2.34 (m, 1H, CyH-P), 2.63 (d, 3H, .sup.3J.sub.PH=7.2, NCH.sub.3), 4.02-4.20 (m, 1H, CHN), 4.80 (d, 1H, .sup.3J.sub.HH=4.0, CHO), 7.10-7.65 (m, 10H, H arom.); .sup.13C NMR (CDCl.sub.3) (ppm) 12.2 (d, J.sub.PC=3.8, CCH.sub.3), 25.9 (CH.sub.2), 26.6-27.0 (CH.sub.2), 29.3 (d, J.sub.PC=3.3, NCH.sub.3), 32.6 (d, .sup.1J.sub.PC=43.7, CyCH-P), 58.3 (d, .sup.2J.sub.PC=8.1, CHN), 78.6 (d, .sup.3J.sub.PC=2.3, CHO), 126.0 (C arom.), 127.4 (C arom.), 128.2 (C arom.), 128.3 (d, J.sub.PC=9.4, C arom.), 130.5 (d, J.sub.PC=2.1, C arom.), 130.8 (d, J.sub.PC=55.7, C arom.), 131.2 (d, J.sub.PC=9.1, C arom.), 142.5 (C arom.); .sup.31P NMR (CDCl.sub.3) (ppm)+73.7 (m); MS (EI) m/z (relative intensity) 368 (M.sup.+-H; 100), 356 (M.sup.++HBH.sub.3; 25), 312 (10), 262 (15), 248 (15), 209 (10), 193 (25), 166 (10), 148 (20); HRMS (DCI, CH.sub.4) Calcd for C.sub.22H.sub.32BNOP [M.sup.+-H] 368.2315. found: 368.2319; Anal. Calcd for C.sub.22H.sub.32BNOP (369.2883): C, 71.55; H, 9.01; N, 3.79. found: C, 71.71; H, 9.13; N, 3.67.

(Rp)-(+)-N-methyl-N-[(1R,2S)(1-hydroxy-1-phenyl-prop-2-yl]aminophenyl-i-propyl phosphine borane

(81) Yield=80%; Colorless oil; [].sub.D.sup.20=+31.7 (c 0.6, CHCl.sub.3); R.sub.f=0.25 (CH.sub.2Cl.sub.2); IR ( cm.sup.1): 3510 (OH), 2974-2874 (CH), 2380 (BH), 1453, 1436, 1386, 1220, 1173, 1107, 1071, 1023, 1005, 955, 914, 884, 742, 727, 698, 645, 619, 582; .sup.1H NMR (CDCl.sub.3, 300.13 MHz) 0.10-0.90 (m, 3H), 0.96 (dd, J=17.1 and 7.2 Hz, 3H), 1.03 (d, J=6.9 Hz, 3H), 1.09 (dd, J=15.3 and 7.2 Hz, 3H), 2.50 (d, J=7.2 Hz, 3H), 2.47-2.61 (m, 1H), 3.97-4.09 (m, 1H), 4.68 (d, J=4.8 Hz, 1H), 7.07-7.19 (m, 3H), 7.23-7.37 (m, 5H), 7.46 (m, 2H); .sup.31P NMR (CDCl.sub.3, 121.5 MHz) +76.4; .sup.13C NMR (CDCl.sub.3, 75.0 MHz) 12.9 (d, J=3.8 Hz), 17.5 (d, J=5.3 Hz), 22.8 (d, J=44.5 Hz), 29.9 (d, J=3.0 Hz), 59.1 (d, J=7.6 Hz), 79.2 (d, J=2.3 Hz), 126.7, 128.1, 128.9, 129.0 (d, J=2.3 Hz), 131.7 (d, J=55.9 Hz), 131.8 (d, J=9.1 Hz), 143.2; MS (EI) m/z (relative intensity) 352 (M.sup.++Na; 100), 338 (M.sup.+-BH.sub.3+Na; 95); HRMS (ESI) calcd for C.sub.19H.sub.29BNNaOP [M+Na].sup.+ 352.1962. found: 352.1976.

(82) A.2. Preparation of Secondary Phosphine Boranes (V)

(83) General procedure

(84) In a 250 mL two-necked flask, equipped with a magnetic, an argon inlet, and a rubber septum were introduced 6 mmol of the aminophosphine borane. A solution of HCl in toluene (36 mmol, 10 (ex: i-Pr) 15 (ex: Fc) equiv.) was next added under stirring at room temperature, without previous dissolution of the aminophosphine borane. After 1 to 48 h, the progress of the reaction being monitored by TLC, the precipitate of ephedrine hydrochloride was filtered off with a Millipore 4 m filter, and the excess of HCl was removed by several vacuum/argon cycles. The tert-butyllithium (12 mmol, 2 equiv.) is added dropwise over 4 minutes at 85 C. to the vigorously stirred toluene solution of the chlorophosphine borane. After stirring for 5 minutes at 85 C., THF (6 mL) is added dropwise over 1 minute and the reaction mixture turned deep yellow. Acetic acid (2.8 mL) was readily added in once. The reaction mixture became bright white and is readily hydrolyzed (50 mL of water). The aqueous phase was extracted several times with CH.sub.2Cl.sub.2. The combined organic layers were dried over MgSO.sub.4, and the solvent was removed. The residue was purified by chromatography on silicagel to afford the pure secondary phosphine borane (V).

(85) A.2.1. (S)-()-o-Anisylphenylphosphine borane (V-f)

(86) Yield=98% (ee=97%); white solid; R.sub.f=0.50 (petroleum ether/toluene 1:1); [].sup.20.sub.D=92 (c 0.4, CHCl.sub.3); IR ( cm.sup.1) 3206, 3001-2837 (CH), 2379 and 2259 (BH), 1588, 1575, 1477, 1463, 1454, 1438, 1433, 1296, 1278, 1247, 1186, 1159, 1134, 1112, 1084, 1072, 1061, 1042, 1023, 974, 953, 912, 899, 858, 797, 767, 739, 728, 696; .sup.1H NMR (CDCl.sub.3): 6 (ppm) 0.50-1.70 (m, 3H), 3.83 (s, 3H), 6.54 (dq, J=396 Hz, J=6.8 Hz, 1H), 6.93 (dd, J=8.3 Hz, J=3.5 Hz, 1H), 7.04-7.08 (m, 1H) 7.36-7.54 (m, 4H), 7.64-7.80 (m, 3H); .sup.13C NMR (CDCl.sub.3): (ppm) 55.9, 110.9 (d, J=3.9 Hz), 114.6 (d, J=55.6 Hz), 121.4 (d, J=12.4 Hz), 126.9 (d, J=58.3 Hz), 128.8 (d, J.sub.PC=10.4 Hz), 131.2 (d, J=2.3 Hz), 132.9 (d, J=9.5 Hz), 134.0 (d, J=2.2 Hz), 135.0 (d, J=13.6 Hz), 160.7 (d, J=1.1 Hz); .sup.31P NMR (CDCl.sub.3): (ppm) 15.3; MS (EI) m/z (relative intensity) 229 (M.sup.+-H), 294 (M.sup.+-BH.sub.3; 100), 226 (15), 217 (50), 186 (55), 170 (10), 121 (20), 56 (10); HRMS (ESI) calcd for C.sub.13H.sub.16BNaOP: 253.0924. Found: 253.0926. The enantiomeric excess of the o-anisylphenylphosphine borane (V-f) was determined by HPLC analysis on a Chiralcel OD-H column, eluent: hexane/isopropyl alcohol 98:2, 1 mL/min, =254 nm: (R), t.sub.R=9.75 min; (S)-enantiomer, t.sub.R=10.50 min.

(87) A.2.2. (S)-Ferrocenylphenylphosphine borane (V-g)

(88) Yield=60% (94% ee); orange oil; R.sub.f=0.5 (petroleum ether/toluene 1:1); IR ( cm.sup.1) 3200-3000 (CH), 2385 and 2346 (BH.sub.3), 2253, 1665, 1484, 1437, 1412, 1387, 1366, 1313, 1157, 1133, 1107, 1061, 1027, 1001, 913, 886, 824, 741, 696; .sup.1H NMR (CDCl.sub.3): (ppm) 0.87-1.67 (m, 3H), 4.29 (s, 5H), 4.49-4.54 (m, 4H), 6.23 (qd, J=381 Hz, J=6.7 Hz, 1H), 7.42-7.54 (m, 3H), 7.65-7.71 (m, 2H); .sup.13C NMR (CDCl.sub.3): (ppm) 64.1 (d, J=67 Hz), 69.8, 72.1 (td, J=22.3 Hz, J=7.1 Hz), 73.0 (d, J=15 Hz), 128.0 (d, J=57.2 Hz), 128.7 (d, J=10.1 Hz), 131.1 (d, J=2.0 Hz), 132.1 (d, J=9.2 Hz); .sup.31P NMR (CDCl.sub.3): (ppm) 6.5. The enantiomeric excess of the ferrocenylphenylphosphine borane (V-g) was determined by HPLC analysis on a Chiralpack AD column, eluent: hexane/isopropylic alcohol 95:5, 1 mL/min, =254 nm: (R), t.sub.R=8.64 min; (S)-enantiomer, t.sub.R=13.06 min.

(89) A.2.3. (R)-()-Phenyl-i-propylphosphine borane (V-h)

(90) Yield=41% (ee=95%); colorless oil; R.sub.f=0.70 (petroleum ether/ethyl acetate 3/1); [].sup.20.sub.D=5.0 (c 0.4, CHCl.sub.3); IR ( cm.sup.1) 3218, 2966-2873 (CH), 2386-2348 (BH), 1439, 1117, 1070, 914, 879, 656; .sup.1H NMR (CDCl.sub.3): (ppm) 0.10-0.90 (m, 3H), 1.19 (ddd, J=16.6 Hz, J=13.8 Hz, J=7.1 Hz, 6H), 2.23-2.28 (m, 1H), 5.26 (ddq, J=365.3 Hz, J=6.8 Hz, J=4.1 Hz, 1H), 7.46-7.56 (m, 3H), 7.66-7.72 (m, 2H); .sup.13C NMR (CDCl.sub.3): (ppm) 17.8 (d, J=38.5 Hz), 23.8 (d, J=35.5 Hz), 124.8 (d, J=53.6 Hz), 128.9 (d, J=9.8 Hz), 131.7 (d, J=3.0 Hz), 133.4 (d, J=8.3 Hz); .sup.31P NMR (CDCl.sub.3) (ppm): +15.6; MS (EI) m/z (relative intensity) 191 (M-BH.sub.3+O+Na.sup.+; 100); HRMS (ESI) calcd for C.sub.9H.sub.16BNaP 189.0977. Found: 189.0940. The enantiomeric excess of the Phenyl-i-propylphosphine borane (V-h) was determined by HPLC analysis on a Lux 5-cellulose 2 column, eluent: hexane/isopropylic alcohol 99:1, 0.5 mL/min, =210 nm: (R), t.sub.R=27.06 min; (S)-enantiomer, t.sub.R=29.87 min.

(91) A.2.4. (R)-Cyclohexylphenylphosphine borane (V-i)

(92) Yield=91% (95% ee); colorless oil; R.sub.f=0.75 (toluene); IR ( cm.sup.1) 3341, 3056, 2930-2854 (CH), 2388-2251, 1486, 1450, 1437, 1346, 1293, 1272, 1203, 1179, 1123, 1059, 1047, 1028, 1002, 911, 875, 845, 822, 748, 702, 675, 592, 508, 488, 480, 429, 406; .sup.1H NMR (CDCl.sub.3): (ppm) 0.40-1.0 (m, 3H), 1.15-1.40 (m, 5H), 1.68-1.73 (m, 1H), 1.79-1.90 (m, 4H), 1.93-2.02 (m, 1H), 5.23 (dqd, J=365 Hz, J=6.8 Hz, J=4.5 Hz, 1H), 7.47-7.51 (m, 2H), 7.53-7.57 (m, 1H) 7.66-7.70 (m, 2H); .sup.13C NMR (CDCl.sub.3): (ppm) 26.0, 26.7-26.8 (m), 28.1, 28.6, 33.7 (d, J=34.8 Hz), 125.2 (d, J=53.1 Hz), 129.2 (d, J=9.6 Hz), 131.9, 133.8 (d, J=7.8 Hz); .sup.31P NMR (CDCl.sub.3) (ppm): +11.6; MS (MALDI) m/z (relative intensity) 229 (M+Na.sup.+; 100), 215 (M-BH.sub.3+Na.sup.+; 5), 193 (M-BH.sub.3+H.sup.+, 15); HRMS (ESI) calcd for C.sub.12H.sub.17NaP 215.0960. Found: 215.0953. The enantiomeric excess of the cyclohexylphenylphosphine borane (V-i) was determined by HPLC analysis on a Chiralcel OJ column, eluent: hexane/isopropylic alcohol 99:1, 1 mL/min, =210 nm: (R), t.sub.R=12.54 min; (S)-enantiomer, t.sub.R=13.54 min.

(93) A.2.5. (S)-()-Phenyl-o-tolylphosphine borane (V-j)

(94) Yield=83%, (94% ee); white oil; R.sub.f=0.58 (petroleum ether/toluene 1:1); IR ( cm.sup.1) 3444, 3058-2854 (CH), 2391-2345 (BH), 2252, 1635-1592, 1474, 1454, 1438, 1384, 1285, 1138, 1112, 1060, 1028, 907, 806, 751, 714, 698, 587, 549, 510, 472, 440; .sup.1H NMR (CDCl.sub.3): (ppm) 0.50-1.50 (m, 3H), 2.29 (s, 3H), 6.35 (dq, J=379 Hz, J=6.9 Hz, 1H), 7.18-7.24 (m, 2H), 7.34-7.37 (m, 3H), 7.40-7.43 (m, 1H), 7.50-7.54 (m, 2H), 7.60 (ddd, J=13.8 Hz, J=7.6 Hz, J=0.95 Hz, 1H); .sup.13C NMR (CDCl.sub.3): (ppm) 21.4 (d, J=5.4 Hz), 125.2 (d, J=55.8 Hz), 126.3 (d, J=56.1 Hz), 126.9 (d, J=11.8 Hz), 129.4 (d, J=10.2 Hz), 131.4 (d, J=7.7 Hz), 131.8 (d, J=2.8 Hz), 132.3 (d, J=2.6 Hz), 133.1 (d, J=9.3 Hz), 134.7 (d, J=13.8 Hz), 142.1 (d, J=5.3 Hz); .sup.31P NMR (CDCl.sub.3): (ppm) 5.4; MS (EI) m/z (relative intensity) 237 (M+Na.sup.+, 100), 223 (M-BH.sub.3+Na.sup.+, 40), 206 (9); HRMS (ESI) calcd for C.sub.13H.sub.16BNaP: 237.09749. Found: 237.09772. The enantiomeric excess of the phenyl-o-tolylphoshine borane (V-j) was determined by HPLC analysis on a Chiralcel OD-H column, eluent: hexane/isopropyl alcohol 98:2, 1 mL/min, =254 nm: (R), t.sub.R=8.29 min; (S)-enantiomer, t.sub.R=8.71 min.

(95) B. Synthesis of (S)-(2-Bromophenyl)-(2-Methoxyphenyl)-Phenylphosphine (II-n) In a One Pot Procedure

(96) Synthesis of (VII). 11.0 mL (3.30 mmol) of a freshly titrated toluene solution of dry HCl was added to 0.33 g (0.83 mmol) of (Rp)-N-methyl-[(1R,2S)(2-hydroxy-1-phenyl)ethyl]-amino-o-anisylphenylphosphine borane (VIII) and the reaction was stirred at room temperature during one hour. The ephedrine hydrochloride was filtered off using a Millipore 4 m filter.

(97) Step (i). The resulting solution of o-anisylchlorophenylphosphine borane (VII) was collected, degassed by four vacuum/argon cycles and cooled to 80 C. 1.20 mL (2.00 mmol) of t-BuLi (1.6 M in pentane) was then added dropwise under argon and the reaction mixture was stirred 5 minutes at 80 C. 2 mL of dry THF was slowly added followed by 0.14 mL (1.16 mmol) of 1,2-dibromobenzene (VI) and the resulting solution was stirred during one hour at 78 C. 5 mL of water was then added and the aqueous phase was extracted with dichloromethane (310 mL). The combined organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue (IV-i) which was diluted with 3 mL of dry toluene under argon atmosphere.

(98) Step (ii-a). 0.28 g (2.49 mmol) of DABCO was added and the resulting solution was stirred at room temperature during 2 hours. The solvent was evaporated under vacuum and the crude product (II-i) was purified by column chromatography on silica gel using petroleum ether/ethyl acetate 3:1 as eluent. Analytical pure sample can be obtained by recrystallization in methylene chloride/methyl alcohol. Colorless solid; Overall yield 51% (0.22 g); Enantiomeric excess: 99% by HPLC analysis (chiralpak AD, 0.2 mL.Math.min.sup.1, hexane/2-propanol 99:1, t.sub.R (R)=30.8 min, t.sub.R (S)=35.0 min); R.sub.f 0.41 (petroleum ether/ethyl acetate 3:1); mp 128-130 C.; [].sub.D+20.6 (c 0.5, CHCl3); IR (neat) 3063, 2930, 2833, 1581, 1571, 1553, 1458, 1428, 1298, 1271, 1239, 1162, 1128, 1093, 1069, 1041, 1017, 864, 793, 752 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.77 (s, 3H), 6.78-6.82 (m, 1H), 6.65-6.70 (m, 1H), 6.87-6.96 (m, 2H), 7.18-7.24 (m, 2H), 7.28-7.43 (m, 6H), 7.58-7.63 (m, 1H); .sup.13C NMR (75.5 MHz, CDCl.sup.3) 55.7, 110.3 (d, J=1.5 Hz), 121.2, 124.5 (d, J=12.4 Hz), 127.3, 128.5 (d, J=7.4 Hz), 129.0, 130.0, 130.1 (d, J=32.0 Hz), 130.6, 132.8 (d, J=2.4 Hz), 133.9, 134.1, 134.4, 135.4 (d, J=10.5 Hz), 138.5 (d, J=11.4 Hz), 161.3 (d, J=15.8 Hz); .sup.31P NMR (121 MHz, CDCl.sub.3) 15.3 (s); HRMS calcd for C.sub.19H.sub.16PBrONa [M+Na].sup.+ 393.0014. found 393.0006; Anal calcd for C.sub.19H.sub.16PBrO: C, 61.48; H, 4.34. found: C, 61.37; H, 4.59.

(99) C Synthesis of -Halogenophenyl Phosphines Boranes (IV) Starting from Secondary Phosphine Boranes (V)

(100) ##STR00026##

(101) TABLE-US-00001 TABLE 1 Synthesis of compounds (IV) (X = Y and R.sup.4 = R.sup.5) R.sup.1R.sup.2P(BH.sub.3)H (V) ArXY (VI) R.sup.1R.sup.2P(BH.sub.3)o-XAr (IV) R.sup.1 R.sup.2 X, Y R.sup.4, R.sup.5 Rdt (%) ee (%) (V-a) Ph Ph (VI-a) Br H (IV-a) 75 (V-b) c-Hex c-Hex (VI-a) Br H (IV-b) 63 (V-c) Me Me (VI-a) Br H (IV-c) 42 (V-d) i-Pr i-Pr (VI-a) Br H (IV-d) 55 (V-e) o-Tol o-Tol (VI-a) Br H (IV-e) 40.sup.a (V-a) Ph Ph (VI-b) Br Me (IV-f) 56 (V-a) Ph Ph (VI-c) I H (IV-g) 50 (V-b) c-Hex c-Hex (VI-c) I H (IV-h) 56 (S)-(V-f).sup.b o-An Ph (VI-a) Br H (R)-(IV-i) 53 95 (R)-(V-f).sup.c Ph o-An (VI-a) Br H (S)-(IV-i) (S)-(V-f).sup.b o-An Ph (VI-c) I H (R)-(IV-j) 42.sup.a 95 (S)-(V-g).sup.b Fc Ph (VI-a) Br H (R)-(IV-k) 47 99 (R)-(V-g).sup.c Ph Fc (VI-a) Br H (S)-(IV-k) 50 99 (S)-(V-g).sup.b Fc Ph (VI-c) I H (R)-(IV-l) 55 99 (R)-(V-h).sup.b i-Pr Ph (VI-a) Br H (S)-(IV-m) 48 95 (S)-(V-h) Ph i-Pr (VI-a) Br H (R)-(IV-m) (R)-(V-i).sup.b c-Hex Ph (VI-a) Br H (S)-(IV-n) 47 95 (S)-(V-i).sup.c Ph c-Hex (VI-a) Br H (R)-(IV-n) 63 95 (R)-(V-j).sup.c Ph o-Tol (VI-a) Br H (S)-(IV-o) 66.sup.a 73 .sup.aisolated after decomplexation. .sup.bprepared starting from ()-ephedrine. .sup.cprepared starting from (+)-ephedrine
C1. Synthesis of Ortho Bromoarylphosphine Boranes (IV:
General procedure

(102) To a solution of secondary phosphine borane (V) (0.83 mmol) in dry THF (2 mL) was added dropwise n-BuLi (0.83 mmol) under argon at 78 C The resulting solution was stirred at this temperature during one hour and 1,2-dibromobenzene (VI-a) (1.16 mmol) was then added dropwise followed by n-BuLi (0.17 mmol). After one hour at 78 C., the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel and/or by recristallisation.

(103) C1.1. (2-Bromophenyl)-Diphenylphosphine Borane (IV-a)

(104) From secondary phosphine borane (V-a); Purification: column chromatography (elution with 2:1 petroleum ether/ethyl acetate) and/or recristallisation in hexane/methylene chloride. White solid; Yield: 75%; R.sub.f 0.62 (petroleum ether/ethyl acetate 2:1); IR (neat) 3052, 2924, 2854, 2814, 2379, 2340, 1558, 1480, 1436, 1424, 1128, 1106, 1058, 1025, 998, 738, 690 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 7.20-7.31 (m, 3H, Harom), 7.36-7.49 (m, 6H, Harom), 7.57-7.64 (m, 5H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 127.3 (d, J=9.1 Hz, Carom), 128.0 (d, J=5.9 Hz, Carom), 128.1 (d, J=58.7 Hz, Carom), 128.8 (d, J=10.4 Hz, Carom), 130.1 (d, J=57.3 Hz, Carom), 131.3 (d, J=2.4 Hz, Carom), 132.7 (d, J=2.1 Hz, Carom), 133.3 (d, J=9.6 Hz, Carom), 135.1 (d, 5.9 Hz, Carom), 136.6 (d, J=10.1 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 26.6; HRMS calcd for C.sub.18H.sub.17PBBrNa (M+Na).sup.+ 379.0221. found 379.0197; Anal calcd for C.sub.18H.sub.17PBBr: C, 60.90; H, 4.83. found: C, 61.06; H, 5.13.

(105) C1.2. (2-Bromophenyl)-dicyclohexylphosphine borane (IV-b)

(106) From secondary phosphine borane (V-b); The same procedure as above was used except that after adding n-BuLi at 78 C., the resulting solution was stirred 30 minutes at this temperature then 30 minutes at room temperature.

(107) Purification: column chromatography (elution with 3:1 petroleum ether/methylene chloride) and/or recristallisation in methyl alcohol/methylene chloride. White solid; Yield: 63%; R.sub.f 0.24 (petroleum ether/methylene chloride 3:1); IR (neat) 2930, 2851, 2379, 1446, 1418, 1274, 1061, 890, 854, 758, 736 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.16-1.37 (m, 1OH, cHex), 1.55-1.70 (m, 6H, cHex), 1.80-1.85 (m, 2H, cHex), 1.93-1.97 (m, 2H, cHex), 2.77-2.85 (m, 2H, cHex), 7.27-7.40 (m, 2H, Harom), 7.60 (dt, J=1.8, 7.7 Hz, Harom), 8.07 (ddd, J=1.7, 7.6, 12.6 Hz, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 25.7 (d, J=1.3 Hz, CH.sub.2), 26.8 (d, J=9.5 Hz, CH.sub.2), 27.0 (d, J=8.5 Hz, CH.sub.2), 27.8 (CH.sub.2), 28.8 (CH.sub.2), 32.9 (d, J=32.3 Hz, CH), 127.1 (d, J=3.1 Hz, Carom), 127.3 (d, J=10.9 Hz, Carom), 128.0 (d, J=46.3 Hz, Carom), 132.4 (d, J=2.1 Hz, Carom), 134.0 (d, J=4.4 Hz, Carom), 140.1 (d, J=15.0 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 40.9; HRMS calcd for C.sub.18H.sub.29PBrBNa (M+Na).sup.+ 389.1179. found 389.1157; Anal calcd for C.sub.18H.sub.29PBrB: C, 58.89; H, 7.96. found: C, 58.68; H, 8.29.

(108) C1.3. (2-bromophenyl)-dimethylphosphine borane (IV-c)

(109) The same procedure as above was used starting from secondary phosphine borane (V-c), except that after adding n-BuLi at 78 C., the resulting solution was stirred 30 minutes at this temperature then 30 minutes at room temperature.

(110) Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate). Colorless oil; Yield: 42%; R.sub.f 0.49 (petroleum ether/ethyl acetate 3:1); IR (neat) 3077, 2375, 2360, 2335, 1580, 1559, 1453, 1413, 1302, 1289, 1273, 1256, 1144, 1109, 1071, 1022, 946, 919, 755 cm.sup.1; H NMR (300 MHz, Acetone d.sup.6) 1.55 (d, J=10.4 Hz, 6H, CH.sub.3), 7.24-7.33 (m, 2H, Harom), 7.52-7.59 (m, 1H, Harom), 7.70-7.77 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, Acetone d.sup.6) 12.0 (d, J=40.1 Hz, CH.sub.3), 127.5 (Carom), 128.6 (d, J=10.9 Hz, Carom), 131.8 (d, J=50.6 Hz, Carom), 134.2 (d, J=2.2 Hz, Carom), 135.4 (d, J=4.7 Hz, Carom), 137.0 (d, J=15.7 Hz, Carom); .sup.31P NMR (121 MHz, Acetone d.sup.6) 11.1-12.5 (m); HRMS calcd for C.sub.8H.sub.13PBrBNa (M+Na).sup.+ 252.9925. found 252.9923; Anal calcd for C.sub.8H.sub.13PBrB: C, 41.62; H, 5.68. found: C, 41.29; H, 6.07.

(111) C1.4. (2-bromophenyl)-diisopropylphosphine borane (IV-d)

(112) The same procedure as above was used starting from secondary phosphine borane (V-d), except that after adding n-BuLi at 78 C, the resulting solution was stirred 30 minutes at this temperature then 30 minutes at room temperature.

(113) Purification: column chromatography (elution with 3:1 petroleum ether/methylene chloride). White solid; Yield: 55%; R.sub.f 0.26 (petroleum ether/methylene chloride 3:1); IR (neat) 2974, 2932, 2871, 2393, 2373, 2349, 1574, 1557, 1453, 1422, 1389, 1370, 1261, 1110, 1071, 1046, 1021, 931 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.86 (dd, J=7.1, 15.9 Hz, 6H, CH.sub.3), 1.27 (dd, J=7.0, 15.8 Hz, 6H, CH.sub.3), 2.95-3.09 (m, 2H, CH), 7.22-7.35 (m, 2H, Harom), 7.55 (tt, J=1.8, 7.7 Hz, 1H, Harom), 8.04 (ddd, J=1.5, 7.5, 12.6 Hz, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 18.5 (d, J=2.8 Hz, CH.sub.3), 18.7 (CH.sub.3), 22.8 (d, J=33.1 Hz, CH) 126.7 (d, J=3.1 Hz, Carom), 127.3 (d, J=10.9 Hz, Carom), 128.7 (d, J=46.6 Hz, Carom), 132.6 (d, J=2.2 Hz, Carom), 134.2 (d, J=4.4 Hz, Carom), 139.8 (d, J=14.8 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 48.4-49.9 (m); HRMS calcd for C.sub.12H.sub.21PBrBNa (M+Na).sup.+ 309.0552. found 309.0545; Anal calcd for C.sub.12H.sub.21PBrB: C, 50.22; H, 7.38. found: C, 50.57; H, 7.53.

(114) C.1.5. (2-bromophenyl)-di(o-tolyl)phosphine borane (IV-e) and free phosphine (II-e)

(115) To a solution of di-(o-tolyl)phosphine borane 37e (0.19 g, 0.83 mmol) in dry THF (2 mL) was added dropwise under argon at 78 C. n-BuLi (0.83 mmol). The resulting solution was stirred at this temperature during one hour and 1,2-dibromobenzene (VI-a) (0.15 mL, 1.16 mmol) was then added dropwise followed by n-BuLi (0.17 mmol). After one hour at 78 C., the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving the crude (IV-e) which was diluted with dry toluol (5 mL) under argon atmosphere. DABCO (0.28 g, 2.49 mmol) was added and the resulting solution was stirred at room temperature overnight. The solvent was evaporated under vacuo and the crude decomplexed product (II-e) was purified by column chromatography on silica gel using petroleum ether/ethyl acetate 3:1 as eluent. White solid; yield 40%; R.sub.f 0.59 (petroleum ether/ethyl acetate 3:1); IR (neat) 3055, 3002, 2973, 1588, 1554, 1466, 1445, 1422, 1377, 1271, 1250, 1201, 1161, 1130, 1099, 1017, 867, 746, 715 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 2.46 (2s, 6H, CH.sub.3), 6.76-6.78 (m, 3H, Harom), 7.12-7.14 (m, 2H, Harom), 7.22-7.24 (m, 2H, Harom), 7.27-7.29 (m, 2H, Harom), 7.32 (td, J=1.3, 7.4 Hz, 2H, Harom), 7.64-7.66 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 21.1 (CH.sub.3), 21.3 (CH.sub.3), 126.3 (Carom), 127.6 (Carom), 129.0 (Carom), 130.1 (Carom), 130.2 (d, J=4.6 Hz, Carom), 130.6 (d, J=32.5 Hz, Carom), 133.1 (d, J=2.9 Hz, Carom), 133.2 (Carom), 134.0 (d, J=11.4 Hz, Carom), 134.7 (Carom), 137.7 (d, J=10.8 Hz, Carom), 142.8 (d, J=27.4 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 19.7; HRMS calcd for C.sub.20H.sub.18PBrNa (M+Na).sup.+ 391.0222. found 391.0203; Anal calcd for C.sub.20H.sub.18PBr: C, 65.06; H, 4.91. found: C, 65.14; H, 5.00.

(116) C.1.6. (2-bromo-4,5-dimethylphenyl)-diphenylphosphine borane (IV-f)

(117) To a solution of diphenylphosphine borane (V-a) (0.17 g, 0.83 mmol) in dry THF (2 mL) was added dropwise under argon at 78 C. n-BuLi (0.83 mmol). The resulting solution was stirred at this temperature during one hour and 4,5-dibromo-o-xylene (VI-b) (0.31 g, 1.16 mmol) was then added dropwise followed by n-BuLi (0.17 mmol). After one hour at 78 C., the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel using petroleum ether/methylene chloride 3:1 as eluent. Analytical pure sample can be obtained by recristallisation in methylene chloride/hexane. White solid; yield 56%; R.sub.f 0.45 (petroleum ether/ethyl acetate 3:1); IR (neat) 3050, 2986, 2946, 2917, 2417, 2388, 2357, 1588, 1481, 1471, 1436, 1343, 1136, 1125, 1102, 1062, 1028, 999, 923, 877, 749, 734, 701, 692 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 2.17 (s, 3H, CH.sub.3), 2.29 (s, 3H, CH.sub.3), 7.21 (d, J=12.3 Hz, Harom), 7.43-7.56 (m, 7H, Harom), 7.65-7.72 (m, 4H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 19.4 (CH.sub.3), 19.5 (CH.sub.3), 124.7 (d, J=4.4 Hz, Carom), 131.1 (d, J=2.5 Hz, Carom), 133.2 (d, J=9.6 Hz, Carom), 135.9 (d, J=6.1 Hz, Carom), 136.3 (d, J=9.9 Hz, Carom), 137.8 (d, J=11.8 Hz, Carom), 142.6 (d, J=2.2 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 25.5; HRMS calcd for C.sub.20H.sub.21PBBrNa (M+Na).sup.+ 405.0553. found 405.0563; Anal calcd for C.sub.20H.sub.21PBBr: C, 62.71; H, 5.53. found: C, 62.86; H, 5.58.

(118) C.1.7. (R)-(2-bromophenyl)-(2-methoxyphenyl)-phenylphosphine borane (IV-i)

(119) Starting from secondary phosphine borane (S)-(V-f); Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate). White solid; Yield: 53%; Enantiomeric excess: 95% by HPLC analysis (chiralpak AD, 0.2 mL.Math.min.sup.1, hexane-2-propanol 99:1, t.sub.R (R)=29.4 min, t.sub.R (S)=32.2 min; R.sub.f 0.18 (petroleum ether/ethyl acetate 3:1); [].sub.D=1.3 (c 1.6, CHCl.sub.3); IR (neat) 3054, 2940, 2838, 2384, 1589, 1575, 1559, 1478, 1454, 1431, 1277, 1265, 1252, 1164, 1134, 1103, 1059, 1021, 854, 802, 733 cm; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.56 (s, 3H, OCH.sub.3), 6.94 (dd, J=3.8, 8.3 Hz, 1H, Harom), 7.08 (tdd, J=0.8, 2.1, 7.5 Hz, 1H, Harom), 7.28-7.33 (m, 3H, Harom), 7.44-7.54 (m, 4H, Harom), 7.60-7.64 (m, 1H, Harom), 7.80-7.87 (m, 3H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 55.4 (OCH.sub.3), 111.5 (d, J=4.6 Hz, Carom), 116.5 (d, J=57.8 Hz, Carom), 121.5 (d, J=12.2 Hz, Carom), 126.7 (d, J=6.4 Hz, Carom), 127.0 (d, J=9.2 Hz, Carom), 128.3 (d, J=59.9 Hz, Carom), 128.4 (d, J=10.5 Hz, Carom), 131.0 (d, J=61.4 Hz, Carom), 131.1, (d, J=2.4 Hz, Carom), 131.7 (d, J=2.1 Hz, Carom), 133.8 (d, J=1.9 Hz, Carom), 133.9 (d, J=9.8 Hz, Carom), 134.5, (d, J=6.0 Hz, Carom), 135.0 (d, J=9.8 Hz, Carom), 135.6 (d, J=9.8 Hz, Carom), 161.2 (Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 23.7; HRMS calcd for C.sub.19H.sub.19PBrBONa (M+Na).sup.+ 407.0346. found 407.0333; Anal calcd for C.sub.19H.sub.19BBrOP: C, 59.27; H, 4.97. found: C, 58.79; H, 5.25.

(120) C.1.8. (R)-Ferrocenyl-(2-bromophenyl)-phenylphosphine borane (IV-k)

(121) Starting from secondary phosphine borane (S)-(V-g); Purification: recristallisation in hexane/methylene chloride. Orange solid; Yield: 47%; Enantiomeric excess: 99% by HPLC analysis (chiralcel OD-H, 0.5 mL.Math.min.sup.1, hexane-2-propanol 98:2, t.sub.R (R)=19.6 min, t.sub.R (S)=23.2 min; R.sub.f 0.39 (petroleum ether/ethyl acetate 3:1); [].sub.D=+162.9 (c 0.5, CHCl.sub.3); IR (neat) 3092, 3074, 3054, 2408, 2382, 2350, 1571, 1555, 1483, 1450, 1437, 1417, 1387, 1334, 1308, 1271, 1249, 1169, 1130, 1105, 1060, 1053, 1022, 998, 844, 765, 753, 739, 721 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 4.09 (sl, 5H, Cp), 4.14-4.16 (m, 1H, Cp), 4.51-4.53 (m, 1H, Cp), 4.61-4.62 (m, 1H, Cp), 4.84-4.87 (m, 1H, Cp), 7.22-7.31 (m, 3H, Harom), 7.48-7.59 (m, 4H, Harom), 7.73-7.80 (m, 2H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 69.2 (d, J=70.1 Hz, Cp), 69.9 (Cp), 72.0 (Cp), 72.1 (d, J=5.0 Hz, Cp), 72.2 (d, J=6.7 Hz, Cp), 74.7 (d, J=14.5 Hz, Cp), 126.9 (d, J=8.6 Hz, Carom), 127.0 (d, J=7.2 Hz, Carom), 128.5 (d, J=10.5 Hz, Carom), 129.7 (d, J=61.4 Hz, Carom), 131.1 (d, J=2.4 Hz, Carom), 132.1 (d, J=2.0 Hz, Carom), 132.6 (d, J=9.8 Hz, Carom), 132.9 (d, J=58.1 Hz, Carom), 134.7 (d, J=5.7 Hz, Carom), 135.6 (d, J=8.8 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 23.3; HRMS calcd for C.sub.22H.sub.21PBrBFeNa (M+Na).sup.+ 484.9905. found 484.9912; Anal calcd for C.sub.22H.sub.21PBrBFe: C, 57.08; H, 4.57. found: C, 56.78; H, 4.61.

(122) C.1.9. (S)-(2-bromophenyl)-phenylisopropylphosphine borane (IV-m)

(123) Starting from secondary phosphine borane (R)-(V-h); Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate). Colorless oil; Yield: 48%; Enantiomeric excess: 95% by HPLC analysis (lux 5-cellulose 2, 0.2 mL.Math.min.sup.1, hexane-2-propanol 98:2, t.sub.R (S)=35.2 min, t.sub.R (S)=37.7 min; R.sub.f 0.52 (petroleum ether/ethyl acetate 3:1); [].sub.D=45.0 (c 0.3, CHCl.sub.3); IR (neat) 2971, 2932, 2872, 2381, 1576, 1453, 1436, 1417, 1271, 1254, 1108, 1065, 1039, 1024, 739, 696 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.02 (dd, J=7.1, 17.1 Hz, 3H, CH.sub.3), 1.32 (dd, J=7.0, 16.4 Hz, 3H, CH.sub.3), 3.31-3.45 (m, 1H, CH), 7.23-7.40 (m, 5H, Harom), 7.48 (ddd, J=1.3, 2.5, 7.9 Hz, 1H, Harom), 7.55-7.61 (m, 2H, Harom), 8.08 (ddd, J=1.6, 7.7, 12.5 Hz, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 17.3 (d, J=2.3 Hz, CH.sub.3), 18.0 (d, J=2.1 Hz, CH.sub.3), 21.3 (d, J=35.7 Hz, CH), 127.4 (d, J=10.8 Hz, Carom), 127.7 (Carom), 128.3 (d, J=55.2 Hz, Carom), 128.4 (Carom), 128.5 (Carom), 129.6 (d, J=50.6 Hz, Carom), 130.6 (d, J=2.3 Hz, Carom), 132.4 (Carom), 132.6 (Carom), 132.8 (d, J=2.2 Hz, Carom), 134.6 (d, J=4.8 Hz, Carom), 138.1 (d, J=14.6 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 35.0-35.6 (m); HRMS calcd for C.sub.15H.sub.19PBBrNa (M+Na).sup.+ 343.0396. found 343.0407; Anal calcd for C.sub.15H.sub.19PBBr: C, 56.12; H, 5.97. found: C, 56.50; H, 6.16.

(124) C.1.10. (S)-(2-bromophenyl)-cyclohexylphenylphosphine borane (IV-n)

(125) Starting from secondary phosphine borane (R)-(V-i); Purification: column chromatography (elution with 4:1 petroleum ether/ethyl acetate). White solid; Yield: 47%; Enantiomeric excess: 95% by HPLC analysis (chiralcel OD-H, 0.2 mL.Math.min.sup.1, hexane-2-propanol 98:2, t.sub.K (S)=26.1 min, t.sub.R (S)=28.1 min; R.sub.f 0.46 (petroleum ether/ethyl acetate 4:1); [].sub.D=21.6 (c 0.2, CHCl.sub.3); IR (neat) 2936, 2853, 2385, 2348, 1577, 1559, 1489, 1453, 1439, 1421, 1133, 1110, 1057, 1021, 1003, 762, 737 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.29-1.50 (m, 5H, CH.sub.2), 1.74-1.83 (m, 3H, CH.sub.2), 1.90-1.92 (m, 1H, CH.sub.2), 2.03-2.05 (m, 1H, CH.sub.2), 3.18-3.24 (m, 1H, CH), 7.35 (t, J=7.5 Hz, 1H, Harom), 7.41-7.48 (m, 4H, Harom), 7.58 (d, J=7.8 Hz, 1H, Harom), 7.65-7.68 (m, 2H, Harom), 8.17-8.20 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 25.8 (d, J=1.5 Hz, CH.sub.2), 26.7 (CH.sub.2), 26.8 (CH.sub.2), 27.0 (d, J=12.6 Hz, CH.sub.2), 28.1 (CH.sub.2), 31.3 (d, J=34.7 Hz, CH), 127.4 (d, J=11.0 Hz, Carom), 128.0 (d, J=12.6 Hz, Carom), 128.4 (d, J=67.3 Hz, Carom), 128.5 (d, J=9.9 Hz, Carom), 129.1 (d, J=51.1 Hz, Carom), 130.6 (d, J=2.4 Hz, Carom), 132.4 (d, J=8.7 Hz, Carom), 132.8 (d, J=2.2 Hz, Carom), 134.5 (d, J=4.7 Hz, Carom), 138.3 (d, J=15.1 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 31.3-31.6 (m); HRMS calcd for C.sub.18H.sub.23PBBrNa (M+Na).sup.+ 383.0071. found 383.0723; Anal calcd for C.sub.18H.sub.23PBBr: C, 59.88; H, 6.42. found: C, 66.10; H, 6.16.

(126) C.2. Synthesis of ortho iodophenyl phosphine borane (IV-g, h, j, l):

(127) General Procedure:

(128) To a solution of secondary phosphine borane (V) (0.83 mmol) in dry THF (2 mL) was added dropwise under argon at 78 C. n-BuLi (0.83 mmol). The resulting solution was stirred at this temperature during one hour and 1,2-diiodobenzene (VI-c) (1.16 mmol) was then added dropwise followed by n-BuLi (0.17 mmol). After one hour at 78 C., the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel and/or by recristallisation.

(129) C.2.1. (2-iodophenyl)-diphenylphosphine borane (IV-g)

(130) Starting from secondary phosphine borane (V-a); Purification: column chromatography (elution with 1:1 petroleum ether/methylene chloride) and/or recristallisation in ethyl acetate. White solid; Yield: 50%; R.sub.f 0.45 (petroleum ether/methylene chloride 1:1); IR (neat) 3051, 2401, 2342, 2245, 1570, 1555, 1480, 1436, 1420, 1311, 1255, 1188, 1165, 1126, 1101, 1054, 1028, 999, 972, 737, 688 cm; .sup.1H NMR (300 MHz, CDCl.sub.3) 7.13-7.19 (m, 1H, Harom), 7.20-7.27 (m, 1H, Harom), 7.33-7.40 (m, 1H, Harom), 7.46-7.60 (m, 6H, Harom), 7.68-7.75 (m, 4H, Harom), 8.03 (ddd, J=1.1, 3.2, 7.8 Hz, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 101.2 (d, J=8.4 Hz, Carom), 127.9 (d, J=9.0 Hz, Carom), 128.1 (d, J=58.8 Hz, Carom), 128.9 (d, J=10.2 Hz, Carom), 131.3 (d, J=2.4 Hz, Carom), 132.3 (d, J=2.2 Hz, Carom), 133.3 (d, J=58.6 Hz, Carom), 133.6 (d, J=9.5 Hz, Carom), 136.5 (d, J=10.5 Hz, Carom), 142.7 (d, J=7.1 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 30.5; HRMS calcd for C.sub.18H.sub.17PIBNa (M+Na).sup.+ 425.0101. found 425.0096; Anal calcd for C.sub.18H.sub.17PIB: C, 53.78; H, 4.26. found: C, 53.97; H, 4.36.

(131) C.2.2. (2-iodophenyl)-dicyclohexylphosphine borane (IV-h)

(132) The same procedure as above was used starting from secondary phosphine borane (V-b), except that after adding n-BuLi at 78 C., the resulting solution was stirred 10 minutes at this temperature then 20 minutes at room temperature.

(133) Purification: column chromatography (elution with 2:1 petroleum ether/methylene chloride). White solid; Yield: 56%; R.sub.f 0.33 (petroleum ether/methylene chloride 2:1); IR (neat) 2919, 2851, 2397, 2352, 1573, 1556, 1447, 1414, 1345, 1064, 1040, 1004, 918, 887, 852, 818, 762, 734, 714, 639 cm; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.00-1.17 (m, 10H, Hcy), 1.44-1.56 (m, 6H, Hcy), 1.63-1.67 (m, 2H, Hcy), 1.76-1.80 (m, 2H, Hcy), 2.73-2.85 (m, 2H, Hcy), 6.92 (tt, J=1.5, 7.5 Hz, 1H, Harom), 7.22 (tt, J=1.3, 7.5 Hz, 1H, Harom), 7.77 (dt, J=1.5, 7.9 Hz, 1H, Harom), 7.86 (ddd, J=0.9, 7.7, 12.9 Hz, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 25.7 (d, J=1.2 Hz, CH.sub.2), 26.9 (d, J=3.5 Hz, CH.sub.2), 27.1 (d, J=2.7 Hz, CH.sub.2), 27.8 (CH.sub.2), 28.7 (d, J=1.2 Hz, CH.sub.2), 32.5 (d, J=31.8 Hz, CH), 99.8 (d, J=2.3 Hz, Carom), 127.9 (d, J=11.2 Hz, Carom), 131.2 (d, J=47.2 Hz, Carom), 132.2 (d, J=2.2 Hz, Carom), 140.8 (d, J=16.0 Hz, Carom), 141.7 (d, J=5.2 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 41.6; HRMS calcd for C.sub.18H.sub.29PIBNa (M+Na).sup.+ 437.1040. found 437.1012; Anal calcd for C.sub.18H.sub.29PIB: C, 52.21; H, 7.06. found: C, 52.19; H, 6.98.

(134) C.2.3. (R)-(2-iodophenyl)-(2-methoxyphenyl)-phenylphosphine borane (IV-j) and free phosphine (II-j)

(135) To a solution of secondary phosphine borane (S)-(V-f) (0.19 g, 0.83 mmol) in dry THF (2 mL) was added dropwise under argon at 78 C. n-BuLi (0.83 mmol). The resulting solution was stirred at this temperature during one hour and 1,2-diiodobenzene (VI-c (0.15 mL, 1.16 mmol) was then added dropwise followed by n-BuLi (0.17 mmol). After one hour at 78 C., the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving the crude (IV-j), which was diluted with dry toluol (5 mL) under argon atmosphere. DABCO (0.28 g, 2.49 mmol) was added and the resulting solution was stirred at room temperature overnight. The solvent was evaporated under vacuo and the crude product (II-j) was purified by column chromatography on silica gel using petroleum ether/ethyl acetate 3:1 as eluent. White solid; Yield 42%; Enantiomeric excess: 95% by .sup.1H NMR and/or .sup.31P NMR of the corresponding phosphine oxide with (R)-3,5-dinitro-N-(1-phenyl-ethyl)-benzamide as chiral reagent; R.sub.f 0.45 (petroleum ether/ethyl acetate 3:1); [].sub.D24.2 (c 0.4, CHCl.sub.3); IR (neat) 3050, 2933, 2835, 1584, 1573, 1554, 1472, 1462, 1431, 1300, 1274, 1241, 1183, 1163, 1130, 1094, 1071, 1043, 1024, 796, 753, 698 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.67 (s, 3H, OCH.sub.3), 6.56 (ddd, J=1.7, 4.4, 7.4 Hz, 1H, Harom), 6.72 (dt, J=1.9, 7.7 Hz, 1H, Harom), 6.77-6.86 (m, 2H, Harom), 6.92 (td, J=1.7, 7.6 Hz, 1H, Harom), 7.13-7.32 (m, 7H, Harom), 7.81 (ddd, J=1.1, 3.1, 7.8 Hz, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 55.8 (OCH.sub.3), 107.2 (d, J=41.4 Hz, Carom), 110.4 (d, J=1.5 Hz, Carom), 121.2 (Carom), 125.0 (d, J=12.7 Hz, Carom), 128.1 (Carom), 128.5 (Carom), 128.6 (Carom), 128.9 (Carom), 130.0 (Carom), 130.6 (Carom), 133.9 (Carom), 134.1 (Carom), 134.2 (Carom), 134.5 (Carom), 135.8 (d, J=10.9 Hz, Carom), 139.6 (d, J=3.8 Hz, Carom), 141.9 (d, J=9.0 Hz, Carom), 161.2 (d, J=15.6 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 1.8; HRMS calcd for C.sub.19H.sub.16PIONa (M+Na)+ 440.9876. found 440.9891; Anal calcd for C.sub.19H.sub.16PIO: C, 54.57; H, 3.86. found: C, 54.55; H, 3.90.

(136) C.2.4. (R)-Ferrocenyl-(2-iodophenyl)-phenylphosphine borane (IV-1)

(137) Starting from secondary phosphine borane (S)-(V-g); Purification: Recristallisation in hexane/methylene chloride. Orange solid; Yield 55%; Enantiomeric excess: 99% by HPLC analysis (chiralcel OD-H, 0.5 mL.Math.min.sup.1, hexane-2-propanol 98:2, t.sub.R (R)=19.2 min, t.sub.R (S)=25.2 min; R.sub.f 0.54 (petroleum ether/ethyl acetate 3:1); [].sub.D +207.1 (c 0.6, CHCl.sub.3); IR (neat) 3124, 3086, 3052, 2407, 2380, 2350, 1553, 1483, 1426, 1387, 1368, 1335, 1100, 1059, 1027, 1010, 821, 739, 716, 693 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 4.07-4.08 (m, 1H, Cp), 4.09 (sl, 5H, Cp), 4.51-4.52 (m, 1H, Cp), 4.62-4.63 (m, 1H, Cp), 7.07 (tt, J=1.6, 7.5 Hz, Harom), 7.14 (ddd, J=1.7, 7.8, 11.0 Hz, 1H, Harom), 7.28-7.33 (m, 2H, Harom), 7.50-7.63 (m, 3H, Harom), 7.77-7.83 (m, 2H, Harom), 7.91 (ddd, J=1.0, 3.1, 7.8 Hz, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 69.8 (d, J=70.0 Hz, Cp), 70.0 (Cp), 71.7 (d, J=3.7 Hz, Cp), 72.1 (d, J=8.4 Hz, Cp), 72.3 (d, J=6.5 Hz, Cp), 74.9 (d, J=14.9 Hz, Cp), 100.2 (d, J=9.8 Hz, Carom), 127.6 (d, J=8.3 Hz, Carom), 128.6 (d, J=10.5 Hz, Carom), 129.2 (d, J=60.8 Hz, Carom), 131.3 (d, J=2.4 Hz, Carom), 131.7 (d, J=2.1 Hz, Carom), 133.4 (d, J=9.5 Hz, Carom), 135.4 (d, J=9.0 Hz, Carom), 136.0 (d, J=58.3 Hz, Carom), 142.2 (d, J=7.1 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 27.5; HRMS calcd for C.sub.22H.sub.21PIBFeNa (M+Na).sup.+ 532.9764. found 532.9747; Anal calcd for C.sub.22H.sub.21PIBFe: C, 51.82; H, 4.15. found: C, 52.03; H, 4.12.

(138) C.3 Synthesis of (S)-o-anisylphenyl-o-tolylphosphine borane by direct alkylation in ortho position:

(139) ##STR00027##

(140) To a solution of secondary phosphine borane (V) (0.5 mmol) in dry THF (3 mL) was added dropwise n-BuLi (1.25 mmol; 2.5 equiv) under argon at 78 C. The resulting solution was stirred at this temperature during 5 min. and 1,2-dibromobenzene (0.75 mmol; 1.5 equiv) was then added dropwise. After 10 min. at 78 C., the reaction mixture was quenched with MeI (0.5 mL) and stirred for 10 min. After hydrolysis (1 mL), the solvent is removed under vacuum, and the residue extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving the crude 40 which was purified by short filtration on silica gel.

(141) .sup.1H NMR (CDCl.sub.3): (ppm) 0.80-2.0 (3H, m), 2.30 (3H, s), 3.57 (3H, s), 6.9-8.0 (13H, m); .sup.31P NMR (121 MHz, CDCl.sub.3) +18.6 (J.sub.PB=56 Hz)

(142) However, after work up, a mixture of free phosphine 41 and its borane complex 40 was obtained. This one was taken up in ethanol and stirred overnight to complete the decomplexation. Yield=92%;

(S)-()-o-Anisylphenyl-o-tolylphosphine 41

(143) White crystals (EtOH); R.sub.f=0.68 (toluene); .sup.1H NMR (CDCl.sub.3): (ppm) 2.33 (3H, s), 3.68 (3H, s), 6.53-6.58 (1H, m), 6.66-6.70 (1H, m), 6.74-6.85 (2H, m), 6.95-7.05 (1H, m), 7.08-7.30 (8H, m); .sup.13C NMR (CDCl.sub.3): (ppm) 21.2 (d, .sup.3J.sub.PC=21.3), 55.7, 110.2 (d, J.sub.PC=1.7), 121.1, 124.7 (d, J.sub.PC=11.6, 125.9, 128.3-128.6, 129.9 (d, J.sub.PC=4.6), 130.3, 132.8, 133.7, 134.0, 134.3, 135.3-136.0, 142.3 (d, J.sub.PC=26.0), 161.3 (d, J.sub.PC=15.7); .sup.31P NMR (CDCl.sub.3): (ppm) 23.1.

(144) The enantiomeric purity of 41 was determined by comparison with a racemic sample, by .sup.31P NMR in the presence of (+)-di--chlorobis{2-[1-(dimethylamino)ethyl]phenyl-C,N}dipalladium.

(145) D. Decomplexation of Phosphine Boranes (IV) in Phosphines (II)

(146) ##STR00028##

(147) TABLE-US-00002 TABLE 2 Synthesis of free o-haloaryl phosphines (II) Phosphines (II) Phosphines borane (IV) Rdt ee R.sup.1 R.sup.2 R.sup.4 = R.sup.5 X (%) (%) (IV-a) Ph Ph H Br (II-a) 79 (IV-e) o-Tol o-Tol H Br (II-e) 40.sup.a (IV-f) Ph Ph Me Br (II-f) 84 (IV-g) Ph Ph H I (II-g) 83 (R)-(IV-i) o-An Ph H Br (R)-(II-i) 90 99 (S)-(IV-i).sup.b Ph o-An H Br (S)-(II-i) 55.sup.a 99 (R)-(IV-j) o-An Ph H I (R)-(II-j) 42.sup.a 95 (R)-(IV-k) Fc Ph H Br (R)-(II-k) 75 95 (S)-(IV-m) i-Pr Ph H Br (S)-(II-m) 82 94 (R)-(IV-n).sup.b Ph c-Hex H Br (R)-(II-n) 80 86 (S)-(IV-o).sup.b Ph o-Tol H Br (S)-(II-o) 66.sup.a 73 .sup.aglobal yield starting from the corresponding secondary phosphine borane (V). .sup.bprepared starting from (+)-ephedrine
Typical Procedure

(148) To a solution of o-bromophosphine borane (IV) (0.5 mmol) in toluene (3 mL) was added DABCO (1.5 mmol). The resulting solution was stirred under argon at room temperature overnight then the solvent was removed under vacuum. The crude (II) was purified by flash chromatography on silica gel and/or recristallisation.

(149) D.1. (R)-(2-bromophenyl)-(2-methoxyphenyl)-phenylphosphine (II-i)

(150) Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate) and recristallisation in methylene chloride/methyl alcohol. White solid; yield 90%; Enantiomeric excess 99% by HPLC analysis (chiralpak AD, 0.2 mL.Math.min.sup.1, hexane/2-propanol 99:1, t.sub.R (R) 30.8 min, t.sub.R (S) 35.0 min); R.sub.f 0.41 (petroleum ether/ethyl acetate 3:1); [].sub.D 20.6 (c 0.5, CHCl.sub.3); IR (neat) 3063, 2930, 2833, 1581, 1571, 1553, 1458, 1428, 1298, 1271, 1239, 1162, 1128, 1093, 1069, 1041, 1017, 864, 793, 752 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.77 (s, 3H, OCH.sub.3), 6.78-6.82 (m, 1H, Harom), 6.65-6.70 (m, 1H, Harom), 6.87-6.96 (m, 2H, Harom), 7.18-7.24 (m, 2H, Harom), 7.28-7.43 (m, 6H, Harom), 7.58-7.63 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 55.7 (OCH.sub.3), 110.3 (d, J=1.5 Hz, Carom), 121.2 (Carom), 124.5 (d, J=12.4 Hz, Carom), 127.3 (Carom), 128.5 (d, J=7.4 Hz, Carom), 129.0 (Carom), 130.0 (Carom), 130.1 (d, J=32.0 Hz, Carom), 130.6 (Carom), 132.8 (d, J=2.4 Hz, Carom), 133.9 (Carom), 134.1 (Carom), 134.4 (Carom), 135.4 (d, J=10.5 Hz, Carom), 138.5 (d, J=11.4 Hz, Carom), 161.3 (d, J=15.8 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 15.3 (s); HRMS calcd for C.sub.19H.sub.16PBrONa [M+Na].sup.+ 393.0014. found 393.0006; Anal calcd for C.sub.19H.sub.16PBrO: C, 61.48; H, 4.34. found: C, 61.37; H, 4.59.

(151) D.2. (R)-(2-bromophenyl)-ferrocenyl-phenylphosphine (II-k)

(152) Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate). Orange solid; Yield 75%; Enantiomeric excess (after complexation with BH.sub.3) 99% by HPLC analysis (chiralcel OD-H, 0.5 mL.Math.min.sup.1, hexane/2-propanol 98:2, t.sub.R (R) 19.6 min, t.sub.R (S) 23.2 min); Rf 0.50 (petroleum ether/ethyl acetate 3:1); [].sub.D.sup.20+207.1 (c 0.6; CHCl.sub.3) IR (neat) 3104, 3045, 2926, 2855, 1741, 1552, 1481, 1446, 1436, 1420, 1308, 1270, 1248, 1192, 1163, 1108, 1098, 1016, 1003, 890, 821, 748, 698 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.60-3.61 (m, 1H, Hfer), 3.98 (br.s, 5H, Hfer), 4.21-4.23 (m, 1H, Hfer), 4.29-4.31 (m, 1H, Hfer), 4.36-4.39 (m, 1H, Hfer), 6.84 (dt, J=2.1, 7.4 Hz, 1H, Harom), 7.06-7.19 (m, 2H, Harom), 7.28-7.32 (m, 3H, Harom), 7.34-7.42 (m, 3H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 69.9 (Cfer), 71.7 (Cfer), 72.3 (Cfer), 72.4 (d, J=7.1 Hz, Cfer), 75.3 (d, J=31.8 Hz, Cfer), 76.5 (d, J=7.6 Hz, Cfer), 128.1 (Carom), 129.0 (d, J=8.0 Hz, Carom), 129.4 (d, J=30.3 Hz, Carom), 129.9 (Carom), 130.9 (Carom), 133.6 (d, J=1.7 Hz, Carom), 134.8 (d, J=1.5 Hz, Carom), 135.2 (d, J=20.6 Hz, Carom), 137.3 (d, J=8.6 Hz, Carom), 142.6 (d, J=14.8 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 16.6 (s); HRMS calcd for C.sub.22H.sub.18PBrFe [M].sup.+ 447.9675. found 447.9686; Anal calcd for C.sub.22H.sub.18PBrFe: C, 58.84; H, 4.04. found: C, 59.19; H, 4.05.

(153) D.3. (S)-(2-bromophenyl)-isopropyl-phenylphosphine (11-m)

(154) Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate). Colorless oil; Yield 82%; Enantiomeric excess (after complexation with BH.sub.3) 95% by HPLC analysis (lux 5 Cellulose-2, 0.2 mL.Math.min.sup.1, hexane/2-propanol 98:2, t.sub.R (S) 39.6 min, t.sub.R (R) 42.3 min); Rf 0.59 (petroleum ether/ethyl acetate 3:1); [].sub.D.sup.20 52.9 (c 0.4; CHCl.sub.3) IR (neat) 3054, 2952, 2865, 1556, 1449, 1421, 1384, 1365, 1250, 1228, 1155, 1124, 1096, 1018, 878, 746, 697 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.06 (dd, J=6.8, 15.5 Hz, 3H, CH.sub.3), 1.20 (dd, J=6.9, 16.0 Hz, 3H, CH.sub.3), 2.41-2.47 (m, 1H, CH), 7.19-7.22 (m, 1H, Harom), 7.32-7.35 (m, 3H, Harom), 7.37 (td, J=1.3, 7.6 Hz, 1H, Harom), 7.46-7.50 (m, 3H, Harom), 7.59 (ddd, J=1.2, 3.4, 8.0 Hz, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 19.3 (d, J=19.6 Hz, CH.sub.3), 19.8 (d, J=19.6 Hz, CH.sub.3), 25.3 (d, J=9.1 Hz, CH), 127.3 (Carom), 128.3 (2s, Carom), 128.9 (Carom), 130.0 (Carom), 131.4 (d, J=30.2 Hz, Carom), 132.8 (Carom), 133.3 (d, J=2.6 Hz, Carom), 133.7 (Carom), 133.8 (Carom), 136.6 (d, J=13.0 Hz, Carom), 138.6 (d, J=14.8 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 1.4 (s); HRMS calcd for C.sub.15H.sub.16PBrNa [M+Na].sup.+ 329.0065. found 329.0057.

(155) E. Synthesis of o-Boronato Phosphine Derivatives (III-42) and (I-43)

(156) E.1. Synthesis of o-boronato phosphine boranes (III-42)

(157) ##STR00029##

(158) TABLE-US-00003 TABLE 3 Synthesis of o-boronatophenylphosphines borane (III-42) Boronato products (III-42) o-bromophosphines borane (IV) Boron reagents Rdt ee R.sup.1 R.sup.2 Z R.sup.9R.sup.10 (%) (%) (IV-a) Ph Ph i- PrO 0 42a 51 (IV-B) cHex cHex i- PrO 42b 66 (R)-(IV-k) Fc Ph i- PrO (S)-42c 43 99 (IV-a) Ph Ph Cl cHex 42d 71 (IV-b) cHex cHex Cl cHex 42e 55 (R)-(IV-k) Fc Ph Cl cHex (S)-42f 60 99
E.1.1. [1,3,2]-dioxaborolan-2-yl derivatives
General Procedure

(159) To a solution of o-bromophosphine borane (IV) (0.50 mmol) in dry THF (2 mL) was added dropwise under argon at 78 C. n-BuLi (0.55 mmol). The resulting solution was stirred at this temperature during one hour and 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.80 mmol) was then added dropwise. After 30 minutes at 78 C. and 20 hours at room temperature, the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel and/or by recristallisation.

(160) E.1.1.1. Diphenyl-[2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]phosphine borane 42a

(161) Starting from the o-bromophenyl phosphine borane (IV-a); Purification: column chromatography (elution with 1:1 petroleum ether/methylene chloride). White solid; Yield: 51%; R.sub.f 0.28 (petroleum ether/methylene chloride 1:1); IR (neat) 2976, 2415, 2373, 2349, 1584, 1481, 1435, 1356, 1320, 1262, 1215, 1144, 1107, 1059, 964, 861, 733, 697, 667, 650 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.95 (s, 12H, CH.sub.3), 7.15-7.22 (m, 2H, Harom), 7.27-7.42 (m, 8H, Harom), 7.55-7.62 (m, 4H, Harom), 7.84 (ddd, J=1.4, 2.9, 7.2 Hz, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 24.7 (CH.sub.3), 83.9 (C(CH.sub.3).sub.2), 128.3 (d, J=10.3 Hz, Carom), 129.9 (d, J=2.5 Hz, Carom), 130.1 (d, J=10.0 Hz, Carom), 130.6 (d, J=2.5 Hz, Carom), 130.7 (d, J=57.7 Hz, Carom), 133.5 (d, J=9.3 Hz, Carom), 134.4 (d, J=10.5 Hz, Carom), 134.5 (d, J=55.4 Hz, Carom), 136.7 (d, J=11.4 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 25.0; HRMS calcd for C.sub.24H.sub.21PB.sub.2O.sub.2Na (M+Na).sup.+ 425.1991. found 425.1975; Anal calcd for C.sub.24H.sub.21PB.sub.2O.sub.2: C, 71.69; H, 7.27. found: C, 71.70; H, 7.06.

(162) E.1.1.2. Dicyclohexyl-[2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]phosphine borane 42b

(163) Starting from the o-bromophenylphosphine borane (IV-b); Purification: column chromatography (elution with 1:1 petroleum ether/methylene chloride) and/or recristallisation in methyl alcohol/methylene chloride. White solid; Yield 66%; R.sub.f 0.45 (petroleum ether/methylene chloride 1:1); IR (neat) 2986, 2922, 2849, 2371, 2347, 1446, 1373, 1339, 1317, 1266, 1139, 1107, 1053, 960, 855, 823, 764, 749, 674 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.94-0.99 (m, 10H, cHex), 1.20 (s, 12H, CH.sub.3), 1.36-1.42 (m, 6H, cHex), 1.60-1.62 (m, 2H, cHex), 1.72-1.76 (m, 2H, cHex), 2.39-2.52 (m, 2H, cHex), 7.21-7.25 (m, 2H, Harom), 7.66-7.70 (m, 1H, Harom), 7.88 (ddd, J=1.7, 6.9, 13.3 Hz, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 25.1 (CH.sub.3), 25.8 (d, J=1.0 HZ, CH.sub.2), 27.0 (d, J=8.3 Hz, CH.sub.2), 27.2 (d, J=8.5 Hz, CH.sub.2), 27.6 (CH.sub.2), 28.6 (CH.sub.2), 33.8 (d, J=32.9 Hz, CH), 84.4 (C(CH.sub.3).sub.2), 129.6 (d, J=2.4 Hz, Harom), 130.4 (d, J=12.1 Hz, Harom), 133.1 (d, J=47.7 Hz, Harom), 136.7 (d, J=8.1 Hz, Harom), 137.4 (d, J=16.9 Hz, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 34.0; HRMS calcd for C.sub.24H.sub.41PB.sub.2O.sub.2Na (M+Na).sup.+ 437.2931. found 437.2905; Anal calcd for C.sub.24H.sub.41PB.sub.2O.sub.2: C, 69.60; H, 9.98. found: C, 69.49; H, 10.06.

(164) E.1.1.3. (S)-Ferrocenyl-phenyl-[2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]phosphine borane 42c

(165) Starting from the o-bromophenyl phosphine borane (R)-(IV-k); Purification: column chromatography (elution with 2:1 petroleum ether/methylene chloride). Orange solid; Yield 43%; Enantiomeric excess: 99% by HPLC analysis (chiralcel OD-H, 0.2 mL.Math.min.sup.1, hexane-2-propanol 98:2, t.sub.R (R)=27.2 min, t.sub.R (S)=29.7 min; R.sub.f 0.32 (petroleum ether/methylene chloride 2:1); [].sub.D +116.7 (c 0.3, CHCl.sub.3); IR (neat) 2979, 2927, 2855, 2396, 1480, 1352, 1320, 1266, 1171, 1145, 1109, 1054, 1028, 860, 824, 740, 697 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.93-0.1.03 (2s, 12H, CH.sub.3), 3.91-3.92 (m, 1H, Cp), 4.06 (sl, 5H, Cp), 4.38-4.39 (m, 1H, Cp), 4.47-4.48 (m, 1H, Cp), 4.69-4.70 (m, 1H, Cp), 7.14-7.40 (m, 6H, Harom), 7.57-7.63 (m, 2H, Harom), 7.73-7.77 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 24.6-24.7 (2s, CH.sub.3), 69.8 (Cp), 71.2 (d, J=68.6 Hz, Cp), 71.6 (d, J=4.0 Hz, Cp), 71.8 (d, J=5.7 Hz, Cp), 72.3 (d, J=4.6 Hz, Cp), 74.4 (d, J=13.6 Hz, Cp), 83.8 (C(CH.sub.3).sub.2), 127.8 (d, J=10.4 Hz, Carom), 129.4 (d, J=2.4 Hz, Carom), 129.7 (d, J=9.4 Hz, Carom), 130.2 (d, J=2.4 Hz, Carom), 132.2 (d, J=60.6 Hz, Carom), 133.0 (d, J=9.6 Hz, Carom), 133.6 (d, J=9.2 Hz, Carom), 136.4 (d, J=11.3 Hz, Carom), 137.2 (d, J=54.9 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 20.8; HRMS calcd for C.sub.28H.sub.33PB.sub.2O.sub.2FeNa (M+Na).sup.+ 533.1656. found 533.1654; Anal calcd for C.sub.28H.sub.33PB.sub.2O.sub.2Fe: C, 65.94; H, 6.52. found: C, 65.73; H, 6.45.

(166) E.1.2. Dicyclohexylboranyl Derivatives

(167) General Procedure

(168) To a solution of o-bromophosphine borane (IV) (0.50 mmol) in dry THF (2 mL) was added dropwise under argon at 78 C. n-BuLi (0.55 mmol). The resulting solution was stirred at this temperature during one hour and chlorodicyclohexylboran 56b (IM solution in hexane) (0.80 mmol) was then added dropwise. After 30 minutes at 78 C. and 20 hours at room temperature, the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel.

(169) E.1.2.1. (2-dicyclohexylboranyl-phenyl)-diphenylphosphine borane 42d

(170) Starting from the o-bromophenylphosphine borane (IV-a). Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate). White solid; Yield: 71%; R.sub.f 0.57 (petroleum ether/ethyl acetate 3:1); IR (neat) 2914, 2842, 2779, 2494, 2449, 2158, 1437, 1106, 688 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.78-0.95 (m, 2H, Hcy), 1.05-1.09 (m, 10H, Hcy), 1.50-1.69 (m, 10H, Hcy), 7.14-7.26 (m, 2H, Harom), 7.29-7.32 (m, 1H, Harom), 7.43-7.57 (m, 11H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 27.4 (CH.sub.2), 28.4 (CH.sub.2), 28.7 (CH.sub.2), 31.0 (CH.sub.2), 31.9 (CH.sub.2), 33.5 (CH), 125.5 (d, J=8.7 Hz, Carom), 127.8 (Carom), 128.4 (d, J=62.8 Hz, Carom), 128.7 (d, J=10.6 Hz, Carom), 130.3 (d, J=2.9 Hz, Carom), 130.5 (d, J=8.5 Hz, Carom), 131.3 (d, J=2.6 Hz, Carom), 132.8 (d, J=5.8 Hz, Carom), 133.3 (d, J=9.6 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 13.6; HRMS calcd for C.sub.30H.sub.39PB.sub.2Na (M+Na).sup.+ 475.2878. found 475.2869; Anal calcd for C.sub.30H.sub.39PB.sub.2: C, 79.68; H, 8.69. found: C, 79.80; H, 8.99.

(171) E.1.2.2 Dicyclohexyl-(2-dicyclohexylboranyl-phenyl)phosphine borane 42e

(172) Starting from the o-bromophenyl-dicyclohexylphosphine borane (IV-b). Purification: column chromatography (elution with 3:1 petroleum ether/methylene chloride). White solid; Yield 55%; R.sub.f 0.63 (petroleum ether/methylene chloride 3:1); IR (neat) 2918, 2845, 2455, 2412, 2148, 1442, 1272, 1169, 1128, 1082, 1004, 889, 852, 755 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.88-1.08 (m, 4H, Hcy), 1.15-1.50 (m, 20H, Hcy), 1.65-1.85 (m, 16H, Hcy), 1.98-2.15 (m, 4H, Hcy), 7.20-7.27 (m, 2H, Harom), 7.31-7.41 (m, 2H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 25.8 (CH.sub.2), 26.7 (CH.sub.2), 26.9-27.0 (m, CH.sub.2), 27.5 (m, CH.sub.2), 28.8 (d, J=25.3 Hz, CH.sub.2), 31.7 (d, J=16.8 Hz, CH.sub.2), 33.0 (d, J=36.0 Hz, CH), 34.0 (CH), 124.8 (d, J=8.0 Hz, Harom), 126.5 (d, J=60.8 Hz, Harom), 129.7 (d, J=2.8 Hz, Harom), 130.4 (d, J=4.8 Hz, Harom), 130.7 (d, J=14.7 Hz, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 18.0; HRMS calcd for C.sub.30H.sub.51PB.sub.2Na (M+Na).sup.+ 487.3817. found 487.3789; Anal calcd for C.sub.30H.sub.51PB.sub.2: C, 77.60; H, 11.07. found: C, 77.41; H, 11.20.

(173) E.1.2.3. (S)-Ferrocenyl-(2-dicyclohexylboranyl-phenyl)phosphine borane 42f

(174) Starting from the ferrocenyl-(o-bromophenyl)-phenylphosphine borane (R)-(IV-k). Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate). Orange solid; Yield 60%; Enantiomeric excess: 99% by HPLC analysis (chiralpak AD, 0.2 mL.Math.min.sup.1, hexane-2-propanol 98:2, t.sub.R (R)=21.2 min, t.sub.R (S)=24.7 min; R.sub.f 0.62 (petroleum ether/ethyl acetate 3:1); [C].sub.D 51.4 (c 0.4, CHCl.sub.3); IR (neat) 2915, 2843, 2468, 2418, 2200, 1436, 1179, 1171, 1108, 1027, 1000, 967, 838, 751, 742, 691 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.77-0.80 (m, 6H, Hcy), 0.98-0.99 (m, 2H, Hcy), 1.10-1.19 (m, 5H, Hcy), 1.32-1.40 (m, 4H, Hcy), 1.46-1.47 (m, 1H, Hcy), 1.59-1.66 (m, 4H, Hcy), 3.80-3.81 (m, 1H, Hfer), 4.20 (s, 5H, Hfer), 4.31-4.32 (m, 1H, Hfer), 4.38-4.39 (m, 1H, Hfer), 4.41-4.42 (m, 1H, Hfer), 7.11-7.14 (m, 3H, Harom), 7.27-7.32 (m, 1H, Harom), 7.36-7.44 (m, 3H, Harom), 7.66-7.72 (m, 2H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 27.3 (d, J=27.8 Hz, CH.sub.2), 28.4 (d, J=24.5 Hz, CH.sub.2), 28.8 (d, J=19.5 Hz, CH.sub.2), 31.0 (d, J=12.9 Hz, CH.sub.2), 31.8 (d, J=15.3 Hz, CH.sub.2), 33.4 (CH), 69.7 (Cfer), 70.0 (d, J=75.6 Hz, Cfer), 70.9 (d, J=7.3 Hz, Cfer), 72.2 (d, J=14.8 Hz, Cfer), 72.7 (d, J=8.7 Hz, Cfer), 73.0 (d, J=6.1 Hz, Cfer), 125.2 (d, J=8.5 Hz, Carom), 128.2 (d, J=64.4 Hz, Carom), 128.4 (d, J=10.5 Hz, Carom), 129.9 (d, J=2.7 Hz, Carom), 130.3 (d, J=15.5 Hz, Carom), 130.6 (d, J=68.9 Hz, Carom), 131.0 (d, J=2.4 Hz, Carom), 132.1 (d, J=5.5 Hz, Carom), 132.7 (d, J=9.4 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 8.3; HRMS calcd for C.sub.34H.sub.43PB.sub.2FeNa (M+Na).sup.+ 583.2542. found 583.2550; Anal calcd for C.sub.34H.sub.43PB.sub.2Fe: C, 72.90; H, 7.74. found: C, 73.20; H, 7.94.

(175) E.2. Synthesis of o-boronato free phosphine (1-43)

(176) ##STR00033##

Synthesis of (S)-(2-methoxyphenyl)-phenyl-[2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]phosphine 43i

(177) ##STR00034##

(178) To a solution of o-bromophenylphosphine (R)-(II-i) (0.15 g, 0.41 mmol) in dry THF (2 mL) was added dropwise under argon at 78 C. n-BuLi (0.45 mmol). The resulting solution was stirred at this temperature during 30 minutes and boron derivatives (2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane) (0.13 mL, 0.66 mmol) was then added dropwise. After 30 minutes at 78 C. and 20 hours at room temperature, the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel using petroleum ether/ethyl acetate 5:1 as eluent. White solid; Yield 58%; Enantiomeric excess: 99% by HPLC analysis (chiralpak AD, 0.2 mL.Math.min.sup.1, hexane-2-propanol 99:1, t.sub.R (R)=26.4 min, t.sub.R (S)=34.1 min; R.sub.f 0.33 (petroleum ether/ethyl acetate 5:1); [].sub.D=21.2 (c 0.3, CHCl.sub.3); IR (neat) 3053, 2978, 2932, 1583, 1471, 1430, 1379, 1347, 1313, 1271, 1240, 1143, 1101, 1047, 1024, 963, 858, 744, 697 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.01-1.02 (2s, 12H, CH.sub.3), 3.68 (s, 3H, 0 CH.sub.3), 6.60 (ddd, J=1.7, 4.3, 7.4 Hz, 1H, Harom), 6.71-6.82 (m, 3H, Harom), 7.18-7.24 (m, 8H, Harom), 7.72-7.76 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 24.5-24.6 (2s, CH.sub.3), 55.7 (OCH.sub.3), 83.8 (C(CH.sub.3).sub.2), 110.0 (d, J=1.5 Hz, Carom), 121.0 (Carom), 127.0 (Carom), 127.2 (d, J=13.9 Hz, Carom), 128.3 (d, J=7.3 Hz, Carom), 128.4 (Carom), 130.0 (Carom), 130.4 (Carom), 132.1 (d, J=1.2 Hz, Carom), 134.0 (Carom), 134.4 (Carom), 134.7 (Carom), 135.5 (d, J=9.0 Hz, Carom), 138.0 (d, J=11.7 Hz, Carom), 143.5 (d, J=19.0 Hz, Carom), 161.4 (d, J=15.8 Hz, Carom); 31P NMR (121 MHz, CDCl.sub.3) 15.4; HRMS calcd for C.sub.25H.sub.28PBO.sub.3Na (M+Na).sup.+ 419.1946. found 419.1932; Anal calcd for C.sub.25H.sub.28PBO.sub.3: C, 71.79; H, 6.75. found: C, 71.60; H, 6.56.

(179) F. Synthesis of o-Carbinol Phosphine Derivatives (III-44) and (I-45)

(180) F.1. Synthesis of o-Carbinol Phosphine Boranes (III-44)

(181) ##STR00035##

(182) TABLE-US-00004 TABLE 4 Synthesis of hydroxyphosphine boranes (III-44) hydroxyphosphines borane o-bromo phosphines (III-44) borane (IV) Aldehyde ratio R.sup.1 R.sup.2 R.sup.11 44:44 rdt (%) ee (%) (R)-(IV-k) Fc Ph Ph 44,44a 45:55 71 99 (S)-(IV-k) Ph Fc Ph 44,44b 64:26 72 99 (S)-(IV-k) Ph Fc t-Bu 44,44c 60:40 66 99
General Procedure

(183) To a solution of o-bromophosphine borane (IV) (0.4 mmol) in dry THF (2 mL) was added n-butyllithium at 78 C. (0.44 mmol, 1.1 eq.). After stirring during one hour at 78 C., a solution of aldehyde (0.8 mmol, 2 eq (benzaldehyde 57a) or 1.6 mmol, 4 q (pivaldehyde 57b) in dry THF (0.5 mL) was added dropwise. The reaction mixture was stirred during 1 h30 to room temperature, then hydrolyzed with water (2 mL) and extracted with methylene chloride (35 mL). The combined organic phases were dried over MgSO.sub.4 and the solvent was removed in vacuo to give a diastereomeric mixture, which was purified and separed by chromatographic column on silica gel using ethyl acetate/petroleum ether as eluent.

(184) F.1.1. (Sp)-[2-(Ferrocenylphenylphosphino borane)-phenyl]phenyl methanol 44a/44a

(185) 185 mg of (R)-ferrocenyl-o-bromophenylphosphine borane (IV-k) and 170 mg of benzaldehyde were used to afford the corresponding hydroxyphosphine borane 44b and 44b, with 71% overall yield and a diastereomeric ratio 44a/44a 45:55.

(Sp,S)-[2-(Ferrocenylphenylphosphino borane)-phenyl]phenyl methanol 44a

(186) Orange solidR.sub.f: 0.65 (ethyl acetate/petroleum ether 1:9)mp=70-72 C.

(187) Enantiomeric excess >99%; [].sub.D=+31.0 (c=0.2; CHCl.sub.3).

(188) IR (cm.sup.1): 3499 (OH), 3057-2855 (CH), 2429 (BH), 2053, 1983, 1950, 1886, 1670, 1590, 1570, 1499, 1471, 1453, 1438, 1412, 1381, 1348, 1314, 1264, 1226, 1197, 1185, 1172, 1130, 1107, 1065, 1034, 1019, 1003, 958, 887, 816, 768, 699.

(189) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=1.35-1.91 (m, 3H, BH.sub.3), 4.10 (s, 5H, Fc), 4.13 (s, 1H, Fc), 4.20 (s, 1H, Fc), 4.56 (s, 1H, Fc), 6.14 (s, 1H, CHOH), 6.76-6.79 (m, 2H, Harom), 6.78-7.04 (m, 1H, Harom), 7.09-7.15 (m, 3H, Harom), 7.17-7.21 (m, 2H, Harom), 7.33-7.38 (m, 1H, Harom) 7.47-7.65 (m, 2H, Harom).

(190) RMN.sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=69.8 (d, J=3.8 Hz, Fc), 69.9 (Fc), 70.7 (d, J=7.5 Hz, Fc), 71.6 d, J=2.3 Hz, Fc), 72.2 (d, J=2.3 Hz, Fc), 72.3 (d, J=17.3 Hz, Fc), 74.8 (d, J=16.6 Hz, CHOH), 126.0 (Carom), 126.7 (Carom), 127.3 (Carom), 127.8 (Carom), 128.5 (d, J=3.8 Hz, Carom), 129 (d, J=8.3 Hz, Carom), 130.3 (d, J=16.6 Hz, Carom), 130.7 (d, J=8.3 Hz, Carom), 131.0 (d, J=12.0 Hz, Carom), 131.5 (d, J=2.3 Hz, Carom), 131.7 (d, J=2.3 Hz, Carom), 132.4 (d, J=6.0 Hz, Carom), 132.6 (d, J=9.8 Hz, Carom), 133.1 (d, J=9.8 Hz, Carom).

(191) .sup.31P NMR (121 MHz, CDCl.sub.3): (ppm)=+13.7 (sl).

(192) Exact mass calculated for C.sub.29H.sub.28BFeNaOP [M+Na].sup.+: 513.1218, tr. 513.1214. Enantiomeric purity was determined by HPLC on chiral column (Chiralcel OD-H, hexane/iPrOH 98:2, 0.8 mL.Math.min.sup.1, J=254 nm, 20 C., t.sub.R (Rp, Rc)=21.7 min, t.sub.R (Sp, Rc)=25.9 min, t.sub.R (Sp, Sc)=34.9 min, t.sub.R (Rp, Sc)=49 min.

(Sp,R)-[2-(Ferrocenylphenylphosphino borane)-phenyl]phenyl methanol 44a

(193) Orange solidR.sub.f: 0.65 (ethyl acetate/petroleum ether 1:9)mp=172-174 C.

(194) Enantiomeric excess >99%*; [].sub.D=85 (c=0.2; CHCl.sub.3).

(195) IR (cm.sup.1): 3509 (OH), 3088-2907 (CH), 2394 (BH), 1705, 1606, 1568, 1495, 1472, 1449, 1437, 1371, 1318, 1262, 1232, 1171, 1126, 1107, 1068, 1017, 1003, 935, 919, 897, 839, 817, 768, 749, 735, 700, 654.

(196) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=1.23-1.30 (m, 3H, BH.sub.3), 4.10 (s, 5H, Fc), 4.12 (s, 1H, Fc), 4.56 (s, 1H, Fc), 4.66 (s, 1H, Fc), 4.79 (s, 1H, Fc), 6.14 (s, 1H, CHOH), 6.76-6.79 (m, 2H, Harom), 6.98-7.09 (m, 1H, Harom), 7.12-7.18 (m, 3H, Harom), 7.20-7.21 (m, 2H, Harom), 7.33-7.38 (m, 1H, Harom) 7.51-7.63 (m, 3H, Harom), 7.86-7.93 (m, 2H, Harom). .sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=69.8 (d, J=3.8 Hz, Fc), 69.9 (Fc), 70.7 (d, J=7.5 Hz, Fc), 71.6 (d, J=2.3 Hz, Fc), 72.1 (d, J=2.3 Hz, Fc), 72.2 (d, J=17.3 Hz, Fc), 74.8 (d, J=16.5 Hz, CHOH), 126 (Carom), 126.7 (Carom), 127.3 (Carom), 127.8 (Carom), 128.5 (d, J=3.8 Hz, Carom), 129.0 (d, J=8.3 Hz, Carom), 130.3 (d, J=16.6 Hz, Carom), 130.7 (d, J=8.3 Hz, Carom), 131.1 (d, J=12 Hz, Carom), 131.0 (d, J=2.5 Hz, Carom), 131.8 (d, J=2.2 Hz, Carom), 132.1 (d, J=6.1 Hz, Carom), 132.6 (d, J=9.7 Hz, Carom), 133.1 (d, J=9.7 Hz, Carom).

(197) .sup.31P NMR (121 MHz, CDCl.sub.3): (ppm)=+14.2 (sl).

(198) Exact mass calculated for C.sub.29H.sub.28BFeNaOP [M+Na].sup.+: 513.1218, tr. 513.1214. Enantiomeric purity was determined by HPLC on chiral column (Chiralcel OD-H, hexane/iPrOH 98:2, 0.8 mL.Math.min, =254 nm, 20 C., t.sub.R (Rp, Rc)=21.7 min, t.sub.R (Sp, Rc)=25.9 min, t.sub.R (Sp, Sc)=34.9 min, t.sub.R (Rp, Sc)=49 min.
F.1.2. (Rp)-[2-(Ferrocenyllhenyhlphoshino borane)-phenyl]phenylmethanol 44b and 44b

(199) 185 mg of (S)-ferrocenyl-o-bromophenylphosphine borane (IV-k) and 170 mg of benzaldehyde were used to afford the corresponding hydroxyphosphine borane 44b and 44b, with 72% overall yield and a diastereomeric ratio 44b/44b 64:26.

(Rp,R)-[2-(Ferrocenylphenylphosphino borane)-phenyl]phenyl methanol 44b

(200) Orange solidR.sub.f: 0.65 (ethyl acetate/petroleum ether 1:9)mp=172-174 C. Enantiomeric excess >99%*; [].sub.D=30.1 (c=0.2; CHCl.sub.3).

(201) IR (cm.sup.1): 3572 (OH), 3057-2922 (CH), 2391 (BH), 1590, 1494, 1436, 1412, 1367, 1313, 1171, 1130, 1108, 1060, 1025, 823, 763, 744, 730, 698.

(202) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=1.23-1.70 (m, 3H, BH.sub.3), 4.08 (s, 5H, Fc), 4.17 (s, 1H, Fc), 4.56 (s, 1H, Fc), 4.66 (s, 1H, Fc), 4.90 (s, 1H, Fc), 6.33 (d, J=2.7 Hz, 1H, CHOH), 7.05-7.10 (m, 1H, Harom), 7.17-7.24 (m, 1H, Harom), 7.27-7.30 (m, 2H, Harom), 7.31-7.32 (m, 2H, Harom), 7.33-7.40 (m, 3H, Harom) 7.57-7.64 (m, 3H, Harrom), 7.89-7.96 (m, 2H, Harom).

(203) .sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=69.4 (d, J=70.2 Hz, Fc), 69.9 (Fc), 71.1 (d, J=6.8 Hz, Fc), 71.4 (d, J=3 Hz, Fc), 72.1 (d, J=6.8 Hz, Fc), 72.4 (d, J=8.3 Hz, Fc), 75 (d, J=16.6 Hz, CHOH), 126.2 (Carom), 126.8 (Carom), 127.4 (d, J=51 Hz, Carom), 127.6 (d, J=13.6 Hz, Carom), 127.9 (Carom), 128.6 (Carom), 129.1 (d, J=9.8 Hz, Carom), 130.8 (d, J=8.3 Hz, Carom), 131.0 (d, J=27.9 Hz, Carom), 131.6 (Carom), 131.9 (d, J=2.3 Hz, Carom), 132.0 (Carom), 132.7 (d, J=7.5 Hz, Carom), 132.9 (d, J=2.3 Hz, Carom).

(204) .sup.31P NMR (121 MHz, CDCl.sub.3): (ppm)=+16.19 (sl).

(205) Exact mass calculated for C.sub.29H.sub.28BFeNaOP [M+Na].sup.+: 513.1218, tr. 513.1221. Enantiomeric purity was determined by HPLC on chiral column (Chiralcel OD-H, hexane/iPrOH 98:2, 0.8 mL.Math.min.sup.1, =254 nm, 20 C., t.sub.R (Rp, Rc)=21.7 min, t.sub.R (Sp, Rc)=25.9 min, t.sub.R (Sp, Sc)=34.9 min, t.sub.R (Rp, Sc)=49 min.

(Rp,S)-[2-(Ferrocenylphenylphosphino borane)-phenyl]phenyl methanol 44b

(206) Orange solidR.sub.f: 0.66 (ethyl acetate/petroleum ether 1:9)mp=92-94 C.

(207) Excs nantiomrique >99%*[].sub.D=+62 (c=0.2; CHCl.sub.3).

(208) IR (cm.sup.1): 3498 (OH), 3055 (CH), 2424 (BH), 1588, 1470, 1436, 1410, 137, 1312, 1261, 1182, 1170, 1105, 1063, 1031, 1017, 1001, 828, 766, 738, 697, 657, 639.

(209) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=0.86-1.34 (m, 3H, BH.sub.3), 4.11 (s, 5H, Fc), 4.14 (s, 1H, Fc), 4.57 (s, 1H, Fc), 4.66 (s, 1H, Fc), 4.80 (s, 1H, Fc), 6.15 (d, J=3 Hz, 1H, CHOH), 6.78-6.99 (m, 2H, Harom), 7.01-7.20 (m, 1H, Harom), 7.14-7.22 (m, 5H, Harom), 7.33-7.42 (m, 1H, Harom), 7.51-7.63 (m, 3H, Harom) 7.87-7.94 (m, 2H, Harom).

(210) .sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=69.0 (d, J=72.4 Hz, Fc), 69.9 (Fc), 70.7 (d, J=7.5 Hz, Fc), 71.6 d, J=2.3 Hz, Fc), 72.2 (d, J=2.3 Hz, Fc), 72.3 (d, J=17.3 Hz, Fc), 74.8 (d, J=17.4 Hz, CHOH), 126.0 (Carom), 126.7 (Carom), 127.3 (d, J=8.3 Hz, Carom), 127.7 (Carom), 128.8 (d, J=10.6 Hz, Carom), 130.3 (d, J=17.4 Hz, Carom), 130.7 (d, J=8.3 Hz, Carom), 131.0 (d, J=12.1 Hz, Carom), 131.5 (d, J=2.3 Hz, Carom), 131.7 (d, J=2.3 Hz, Carom), 132.4 (d, J=6 Hz, Carom), 133.1 (d, J=9.8 Hz, Carom), 141.0 (d, J=11.3 Hz, Carom), 146.6 (d, J=11.3 Hz, Carom).

(211) .sup.31P NMR (121 MHz, CDCl.sub.3): (ppm)=+12.8 (sl).

(212) Exact mass calculated for C.sub.29H.sub.28BFeNaOP [M+Na].sup.+: 513.1218. found: 513.1233.

(213) The enantiomeric purity was determined by HPLC on chiral column (Chiralcel OD-H, hexane/iPrOH 98:2, 0.8 mL.Math.min.sup.1, =254 nm, 20 C., t.sub.R (Rp, Rc)=21.7 min, t.sub.R (Sp, Rc)=25.9 min, t.sub.R (Sp, Sc)=34.9 min, t.sub.R (Rp, Sc)=49 min.

(214) F.1.3. Synthesis of (R) t-butyl-(2-ferrocenylphenyphosphino borane)-phenyl methanol 44c and 44c

(215) 185 mg of (S)-ferrocenylphenyl-o-bromophenylphosphine borane (IV-k) and 138 mg of pivaldehyde were used to afford the corresponding hydroxyphosphine borane 44c and 44c, with 66% overall yield and a diastereomeric ration 44c/44c60:40.

(Rp,Rc) t-Butyl-(2-ferrocenylphenyphosphino borane)-phnyl methanol 44c

(216) Orange solidRf: 0.56 (ethyl acetate/petroleum ether 1:9)mp=170-172 C.

(217) Enantiomeric excess >99%*[].sub.D=214 (c=0.2; CHCl.sub.3).

(218) IR (cm.sup.1): 3553 (OH), 2957-2900 (CH), 2396 (BH), 1568, 1464, 1438, 1416, 1395, 1362, 1311, 1292, 1235, 1197, 1171 (OCH.sub.3), 1108, 1062, 1027, 1001, 829, 741, 699.

(219) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=0.61 (s, 9H, CH.sub.3) 1.44-1.72 (m, 3H, BH.sub.3), 4.05 (s, 5H, Fc), 4.23 (s, 1H, Fc), 4.55 (s, 1H, Fc), 4.61 (s, 1H, Fc), 4.68 (s, 1H, Fc), 4.86 (d, J=3.9 Hz, 1H, CHOH), 7.0-7.07 (m, 1H, Harom), 7.14-7.20 (m, 1H, Harom), 7.39-7.45 (m, 1H, Harom), 7.55-7.57 (m, 3H, Harom) 7.70-7.77 (m, 1H, Harom), 7.89-7.94 (m, 2H, Harom).

(220) .sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=26.7 (CH.sub.3), 69.9 (Fc), 70.1 (d, J=72.4 Hz, Fc), 71.7 (d, J=2.3 Hz, C(CH.sub.3).sub.3), 72.0 (d, J=6 Hz, Fc), 72.2 (d, J=9 Hz, Fc), 74.9 (d, J=16.6 Hz, CHOH), 76 (d, J=8.3 Hz, Fc), 127.0 (d, J=8.3 Hz, Carom), 128.4 (d, J=10.6 Hz, Carom), 128.7 (d, J=8.3 Hz, Carom), 130.3 (Carom), 130.8 (d, J=2.3 Hz, Carom), 130.9 (Carom), 131.5 (d, J=2.3 Hz, Carom), 131.6 (Carom), 132.7 (d, J=6.8 Hz, Carom), 133.4 (d, J=9 Hz, Carom).

(221) .sup.31P NMR (121 MHz, CDCl.sub.3): (ppm)=+13.3 (m).

(222) Exact mass calculated for C.sub.27H.sub.32BFeOPNa [M+Na].sup.+: 493.1531, tr. 493.1547. Enantiomeric purity was determined by HPLC on chiral column (Chiralpack AD, hexane/iPrOH 99:1.1 mL.Math.min.sup.1, =254 nm, 20 C., t.sub.R((Sp,Rc ou Sc)=13.4 min, t.sub.R(Rp, Sc)=14.7 min), t.sub.R ((Sp,Rcou Sc)=34.9 min, t.sub.R (Rp,Rc)=50.9 min).

(Rp,S) t-Butyl-(2-ferrocenylphenyphosphino borane)-phenyl methanol 44c

(223) Orange solidR.sub.f: 0.35 (ethyl acetate/petroleum ether 1:9)mp=160-162 C.

(224) Enantiomeric excess >99%* [].sub.D=232 (c=0.2; CHCl.sub.3).

(225) IR (cm.sup.1): 3585 (OH), 2950 (CH), 2420 (BH), 2364, 2161, 2069, 1587, 1479, 1435, 1261, 1230, 1205, 1171, 107, 1070, 1056, 1026, 1002, 907, 857, 826, 781, 764, 749, 728, 704, 683.

(226) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=0.94 (s, 9H, CH.sub.3) 1.33-1.74 (m, 3H, BH.sub.3), 4.01 (s, 5H, Fc), 4.04 (s, 1H, Fc), 4.50 (s, 1H, Fc), 4.62 (s, 1H, Fc), 4.73 (s, 1H, Fc), 4.88 (d, J=3.9 Hz, 1H, CHOH), 6.98-7.05 (m, 1H, Harom), 7.16-7.21 (m, 1H, Harom), 7.40-7.45 (m, 1H, Harom), 7.53-7.63 (m, 4H, Harom), 7.73-7.85 (m, 2H, Harom).

(227) .sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=26.7 (CH.sub.3), 69.9 (Fc), 70.8 (d, J=70.2 Hz, Fc), 71.3 d, J=9.8 Hz, Fc), 72.1 (d, J=6 Hz, Fc), 75.2 (d, J=16.6 Hz, CHOH), 76.9 (CH.sub.3).sub.3), 127.0 (d, J=9 Hz, Fc), 128.5 (d, J=7.5 Hz, Carom), 128.8 (d, J=9.7 Hz, Carom), 131.0 (d, J=78.5 Hz, Carom), 132.0 (d, J=35.5 Hz, Carom), 132.6 (d, J=9 Hz, Carom), 133.4 (d, J=7.5 Hz, Carom), 146.4 (d, J=7.6 Hz, Carom).

(228) RMN.sup.31P (121 MHz, CDCl.sub.3): (ppm)=+17.1 (m).

(229) Exact mass calculated for C.sub.27H.sub.32BFeNaOP [M+Na].sup.+: 493.1531, tr. 493.1528. Enantiomeric purity was determined by HPLC on chiral column (Chiralpack AD, hexane/iPrOH 98:2, 0.5 mL.Math.min.sup.1, =254 nm, 20 C, t.sub.R((Sp,Rc ou Sc)=13.4 min, t.sub.R(Rp, Sc)=14.7 min) t.sub.R ((Sp,Rcou Sc)=34.9 min, t.sub.R (Rp,Rc)=50.9 min).
F.2. Synthesis of o-carbinol free phosphines (1-45)

(230) ##STR00036##

(231) TABLE-US-00005 TABLE 5 Synthesis of o-anisylhydroxyphosphines borane (I-45d,e) hydroxyphosphines borane o-bromo phosphines (I-45) (II) Aldehyde rdt ee R.sup.1 R.sup.2 R.sup.11 Ratio 45:45 (%) (%) (S)-(II-i) Ph o-An Ph 45,45d 78:22 45 99 (S)-(II-i) Ph o-An t-Bu 45,45e 38:62 50 99
F.2.1. Synthesis of (R)-[2-(o-anisylphenylphosphino)-phenyl]phenyl methanol 45d and 45d

(232) 135 mg of (S)-o-anisyl-o-bromophenylphenylphosphine (II-i) and 170 mg of benzaldehyde 57a were used to afford the corresponding hydroxyphosphines 45d and 45d in 45% overall yield and with a diastereomeric ratio 45d/45d78:22.

(R)-[2-(o-anisylphenylphosphino)-phenyl]phenyl methanol 45d

(233) White solidR.sub.f: 0.46 (ethyl acetate/petroleum ether 1:9)mp=68-70 C.

(234) Enantiomeric excess >99%*[].sub.D=+123 (c=0.2; CHCl.sub.3).

(235) IR (cm.sup.1): 3409 (OH), 3054-2834 (CH), 2332, 2157, 2037, 1882, 1583, 1573, 1493, 1461, 1430, 1296, 1272, 1240, 1179, 1160, 1128, 1069, 1019, 916, 881, 850, 824, 793, 746, 696.

(236) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=3.71 (s, 3H, OCH.sub.3), 6.31 (sl, 1H, CHOH), 6.59-6.64 (m, 1H, Harom), 6.70 (d, J=6.9 Hz, 1H, Harom), 6.78-6.88 (m, 2H, Harom), 6.96-7.0 (m, 1H, Harom), 7.13-7.22 (m, 4H, Harom), 7.32-7.38 (m, 5H, Harom), 7.47-7.50 (m, 2H, Harom), 7.51-7.60 (m, 1H, Harom), 7.67-7.74 (m, 1H, Harom).

(237) .sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=55.7 (OCH.sub.3), 73.4 (d, J=24.9 Hz, CHOH), 110.2 (d, J=2.3 Hz, Carom), 111.8 (d, J=6.8 Hz, Carom), 121.0 (Carom), 121.2 (d, J=11.3 Hz, Carom), 124.8 (d, J=9.8 Hz, Carom), 126.7 (d, J=2.3 Hz, Carom), 126.8 (d, J=6.8 Hz, Carom), 127.8 (d, J=15.0 Hz, Carom), 127.9 (Carom), 128.5 (d, J=18.8 Hz, Carom), 128.6 (Carom), 129.5 (Carom), 130.4 (Carom), 131.2 (Carom), 133.9 (d, J=7.5 Hz, Carom), 134.2 (d, J=8.3 Hz, Carom), 136.0 (d, J=9.0 Hz, Carom), 141.8 (Carom), 143.5 (Carom), 148.7 (d, J=24.1 Hz, Carom).

(238) .sup.31P NMR (121 MHz, CDCl.sub.3): (ppm)=28.1 (s).

(239) Exact mass calculated for C.sub.24H.sub.27NaO.sub.2P [M+Na].sup.+: 421.1328, tr. 421.1345. Enantiomeric purity was determined by HPLC on chiral column (Lux 5 cellulose-2, hexane/iPrOH 90:10, 1 mL.Math.min.sup.1, =254 nm, 20 C, t.sub.R((Sp,Rc ou Sc)=8.7 min, t.sub.R(Rp,Rc ou Sc)=10.9 min, t.sub.R(Sp,Rc ou Sc)=15.7 min, t.sub.R(Rp, Rc ou Sc)=21.3 min).

(R)-[2-(o-anisylphenylphosphino)-phenyl]phenyl methanol 45d

(240) White oilR.sub.f: 0.30 (ethyl acetate/petroleum ether 1:9).

(241) Enantiomeric excess >99%*[].sub.D=47 (c=0.2; CHCl.sub.3).

(242) IR (cm.sup.1): 3355 (OH), 3058-2836 (CH), 1952, 1899, 1812, 1584, 1573, 1494, 1471, 1453, 1431, 1296, 1273, 1240, 1179, 1162, 1128, 1107, 1069, 1019, 915, 881, 852, 821, 794, 742, 695, 649.

(243) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=3.66 (s, 3H, OCH.sub.3), 5.52 (d, J=8 Hz, 1H, CHOH), 6.74-6.80 (m, 1H, Harom), 6.81-7.08 (m, 2H, Harom), 7.12-7.24 (m, 6H, Harom), 7.27-7.42 (m, 5H, Harom), 7.47-7.67 (m, 2H, Harom), 7.72-7.78 (m, 2H, Harom). .sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=55.8 (OCH.sub.3), 73 (d, J=24.9 Hz, CHOH), 110.4 (d, J=2.4 Hz, Carom), 111.5 (d, J=6.8 Hz, Carom), 121 (Carom), 121.2 (d, J=11.2 Hz, Carom), 124.3 (Carom), 126.8 (d, J=2.3 Hz, Carom), 126.9 (d, J=6.7 Hz, Carom), 127.8 (d, J=15 Hz, Carom), 128 (Carom), 128.5 (d, J=18.8 Hz, Carom), 128.6 (Carom), 129.5 (Carom), 130.2 (Carom), 133.2 (Carom), 133.6 (d, J=18.1 Hz, Carom), 134.1 (d, J=9.8 Hz, Carom), 134.7 (d, J=10.7 Hz, Carom), 141.8 (Carom), 142.8 (Carom), 149 (d, J=23.8 Hz, Carom).

(244) .sup.31P NMR (121 MHz, CDCl.sub.3): (ppm)=26.8 (s).

(245) Exact mass calculated for C.sub.24H.sub.27NaO.sub.2P [M+Na].sup.+: 421.1328, tr. 421.1346. Enantiomeric purity was determined by HPLC on chiral column (Lux 5 cellulose-2, hexane/iPrOH 90:10, 1 mL.Math.min.sup.1, =254 nm, 20 C, t.sub.R((Sp,Rc ou Sc)=8.7 min, t.sub.R(Rp,Rc ou Sc)=10.9 min, t.sub.R(Sp,Rc ou Sc)=15.7 min, t.sub.R(Rp, Rc ou Sc)=21.3 min).
F.2.2. Synthesis of (R)-t-butyl-(2-o-anisylphenyphosphino)-phenyl methanol 45e and 45e

(246) 135 mg of (S)-o-anisyl-o-bromophenylphenylphosphine (IV-i) and 138 mg of pivaldehyde 57b were used to afford the corresponding hydroxyphosphines 45e and 45e with 50% overall yield and a diatereomeric ratio 45e/45e38:62.

(R)-t-Butyl-(2-o-anisylphenyphosphino)-phenyl methanol 45e

(247) White solidR.sub.f: 0.46 (ethyl acetate/petroleum ether 1:9)mp=76-78 C.

(248) Enantiomeric excess >99%*[].sub.D=+189 (c=0.2; CHCl.sub.3).

(249) IR (cm.sup.1): 3594 (OH), 2952-2835 (CH), 1573, 1462, 1430, 1361, 1273, 1462, 1430, 1361, 1273, 1240, 1161, 1069, 1002, 745, 696.

(250) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=1.04 (s, 9H, CH.sub.3) 3.74 (s, 1H, OCH.sub.3), 5.5 (d, J=7.5 Hz, 1H, CHOH), 6.69-6.88 (m, 1H, Harom), 6.90-6.97 (m, 3H, Harom), 7.14-7.21 (m, 3H, Harom), 7.31-7.36 (m, 5H, Harom), 7.61-7.63 (m, 1H, Harom).

(251) .sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=26.4 (CH.sub.3), 55.8 (OCH.sub.3), 78.1 (d, J=25.6 Hz, CHOH), 110.4 (d, J=1.5 Hz, Carom), 112.0 (d, J=6.8 Hz, Carom), 121.1 (Carom), 121.3 (d, J=11.3 Hz, Carom), 126.8 (d, J=12.8 Hz, Carom), 127.4 (Carom), 128.3 (d, J=6.0 Hz, Carom), 128.6 (Carom), 130.1 (Carom), 132.9 (Carom), 133.7 (d, J=20.4 Hz, Carom), 134.7 (d, J=2.3 Hz, Carom), 135.4 (d, J=14.3 Hz, Carom), 136.2 (d, J=11.3 Hz, Carom), 147.8 (d, J=23.4 Hz, Carom) 160.7 (d, J=15.8 Hz, Carom).

(252) .sup.31P NMR (121 MHz, CDCl.sub.3): 8 (ppm)=24.6 (s).

(253) Exact mass calculated for C.sub.24H.sub.27NaO.sub.2P [M+Na].sup.+: 401.1641, tr. 401.1653. Enantiomeric purity was determined by HPLC on chiral column (Lux 5 cellulose-2, hexane/iPrOH 98:2, 1 mL.Math.min.sup.1, =254 nm, 20 C, t.sub.R((Rp, Rcou Sc)=7.3 min, t.sub.R((Sp,Rc on Sc)=8.4 min, t.sub.R(Sp, Rc ou Sc)=10.2 min, t.sub.R(Rp,Rc on Sc)=12.7 min).

(R)-t-Butyl-(2-o-anisylphenyphosphino)-phenyl methanol 45e

(254) White solidR.sub.f: 0.34 (ethyl acetate/petroleum ether 1:9)mp=70-72 C.

(255) Enantiomeric excess >99%*[].sub.D=+108 (c=0.2; CHCl.sub.3).

(256) IR (cm.sup.1): 3576-3448 (OH), 3054-2834 (CH), 2340, 1725, 1583, 1573, 1461, 1430, 1393, 1361, 1271, 1240, 1180, 1161, 1128, 1089, 1068, 1041, 1024, 1001, 935, 903, 879, 850, 824, 794, 746, 732, 697.

(257) .sup.1H NMR (300 MHz, CDCl.sub.3): (ppm)=1.01 (s, 9H, CH.sub.3) 3.07 (s, 1H, OCH.sub.3), 5.58 (d, J=8.1 Hz, 1H, CHOH), 6.61-6.65 (m, 1H, Harom), 6.84-6.89 (m, 2H, Harom), 6.96-7.19 (m, 1H, Harom), 7.14-7.19 (m, 1H, Harom), 7.32-7.40 (m, 7H, Harom), 7.62-7.64 (m, 1H, Harom).

(258) .sup.13C NMR (75 MHz, CDCl.sub.3): (ppm)=27.0 (CH.sub.3), 52.4 (C(CH.sub.3).sub.3), 54.4 (OCH.sub.3), 80.3 (d, J=4.7 Hz, CHOH), 110.4 (d, J=6.8 Hz, Carom), 110.7 (d, J=6.0 Hz, Carom), 119.8 (d, J=12.0 Hz, Carom), 125 (d, J=13.6 Hz, Carom), 128.1 (d, J=12.1 Hz, Carom), 128.2 (d, J=12.8 Hz, Carom), 129.1 (d, J=10.6 Hz, Carom), 129.6 (d, J=8.3 Hz, Carom), 130.2 (d, J=18.9 Hz, Carom), 130.9 (d, J=3.0 Hz, Carom), 131.4 (d, J=2.3 Hz, Carom), 132.0 (d, J=9.8 Hz, Carom), 132.9 (d, J=14.3 Hz, Carom), 133.7 (d, J=16.6 Hz, Carom) 134.2 (d, J=1.5 Hz, Carom), 134.4 (d, J=8.3 Hz, Carom).

(259) .sup.31P NMR (121 MHz, CDCl.sub.3): (ppm)=26.8 (s).

(260) Exact mass calculated for C.sub.24H.sub.27NaO.sub.2P [M+Na].sup.+: 401.1641, tr. 401.1629. Enantiomeric purity was determined by HPLC on chiral column (Lux 5 cellulose-2, hexane/iPrOH 98:2, 1 mL.Math.min.sup.1, =254 nm, 20 C, t.sub.R((Rp, Rcou Sc)=7.3 min, t.sub.R((Sp,Rc ou Sc)=8.4 min, t.sub.R(Sp, Rc ou Sc)=10.2 min, t.sub.R(Rp,Rc ou Sc)=12.7 min).
G. Synthesis of O-Acylaryl Phosphine Derivatives (1-46)

(261) ##STR00037##

[o-(t-butylcarbonyl)phenyl]diphenylphosphine (1-46)

(262) To a solution of (2-bromophenyl)diphenylphosphine (II-a) (0.50 mmol) in dry THF (2 mL) was added dropwise under argon at 78 C. n-BuLi (0.55 mmol). The resulting solution was stirred at this temperature during one hour and pivaloyl chloride (0.80 mmol) was then added dropwise. After stirring at room temperature overnight, the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel using petroleum ether/ethyl acetate 3:1 as eluent. White solid; Yield 78%; R.sub.f 0.43 (petroleum ether/ethyl acetate 3:1); IR (neat) 3049, 2967, 2928, 2867, 1686, 1585, 1477, 1458, 1431, 1389, 1361, 1283, 1192, 967, 947, 778, 741, 691 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.35 (s, 9H, CH.sub.3), 7.18-7.22 (m, 1H, Harom), 7.25-7.40 (m, 13H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 27.7 (d, J=3.3 Hz, CH.sub.3), 44.7 (C(CH.sub.3).sub.3), 124.8 (d, J=8.6 Hz, Carom), 128.3 (Carom), 128.5 (d, J=4.9 Hz, Carom), 128.7 (Carom), 133.3 (Carom), 133.5 (Carom), 134.6 (d, J=15.8 Hz, Carom), 134.8 (d, J=2.2 Hz, Carom), 137.0 (d, J=10.4 Hz, Carom), 148.0 (d, J=35.8 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 10.4; HRMS calcd for C.sub.23H.sub.23PONa [M+Na].sup.+ 369.1379. found 369.1382.

(263) H. Synthesis of O-Silano Phosphine Derivatives (1-47)

(264) ##STR00038##

(265) TABLE-US-00006 TABLE 6 Preparation of o-silanophosphines (I-47) o-bromo phosphines (II) o-silanophosphines (I-47) R.sup.1 R.sup.2 (R.sup.11).sub.4-nSiCl.sub.n Rdt (%) e.e. (%) (R)-(II-i) o-An Ph (Me).sub.3SiCl 47a 49 >95 (IV-g) Ph Ph (Me).sub.3SiCl 47d 25 (II-a) Ph Ph Me.sub.2SiCl.sub.2 47b 52 (S)-(II-i) Ph o-An Me.sub.2SiCl.sub.2 47c 61 99
H.1. Synthesis of o-silano phosphines 47a,d
H1.1. (R)-(2-methoxy-phenyl)-phenyl-(2-trimethylsilyl-phenyl)phosphine 47a

(266) To a solution of (R)-(2-bromophenyl)-(2-methoxyphenyl)-phenylphosphine (II-i) (0.19 g, 0.50 mmol) in dry THF (2 mL) was added dropwise under argon at 78 C n-BuLi (0.55 mmol). The resulting solution was stirred at this temperature during one hour and trimethylsilylchloride (0.10 mL, 0.80 mmol) was then added dropwise. After stirring until room temperature during 20 h, the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel using petroleum ether/methylene chloride 2:1 as eluent. White solid; Yield 49%; Enantiomeric excess >95% by .sup.31P NMR of the corresponding phosphine oxide with (R)-3,5-dinitro-N-(1-phenyl-ethyl)-benzamide as chiral reagent; R.sub.f 0.38 (petroleum ether/methylene chloride 2:1); [].sub.D +1.6 (c 0.9, CHCl.sub.3); IR (neat) 3057, 2960, 2900, 1583, 1572, 1472, 1431, 1272, 1242, 1182, 1160, 1125, 1114, 1021, 834, 753, 743 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.20 (d, J=1.5 Hz, SiCH.sub.3), 3.53 (s, 3H, OCH.sub.3), 6.48 (ddd, J=1.8, 4.2, 7.5 Hz, 1H, Harom), 6.65-6.71 (m, 2H, Harom), 6.91-6.93 (m, 1H, Harom), 7.00-7.06 (m, 4H, Harom), 7.10-7.17 (m, 4H, Harom), 7.44-7.45 (m, 1H, Harom), .sup.13C NMR (75.5 MHz, CDCl.sub.3) 0.1 (d, J=9.6 Hz, SiCH.sub.3), 54.3 (OCH.sub.3), 109.0 (d, J=1.4 Hz, Carom), 119.6 (Carom), 125.9 (d, J=13.3 Hz, Carom), 126.7 (Carom), 126.8 (d, J=0.9 Hz, Carom), 126.9 (Carom), 127.0 (Carom), 127.7 (Carom), 128.7 (Carom), 132.1 (Carom), 132.4 (Carom), 133.3 (d, J=16.2 Hz, Carom), 133.7 (d, J=1.2 Hz, Carom), 136.3 (d, J=11.4 Hz, Carom), 141.7 (d, J=11.3 Hz, Carom), 146.3 (d, J=47.2 Hz, Carom), 159.6 (d, J=15.5 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 20.6; HRMS calcd for C.sub.22H.sub.25POSiNa (M+Na).sup.+ 387.1304. found 387.1296; Anal calcd for C.sub.22H.sub.25POSi: C, 72.49; H, 6.91. found: C, 72.19; H, 7.02.

(267) H.1.2. diphenyl-(2-trimethylsilyl-phenyl)phosphine 47d

(268) To a solution of o-iodophosphine borane (IV-g) (0.19 g, 0.47 mmol) in dry THF (2 mL) was added dropwise under argon at 20 C. i-PrMgCl.LiCl (0.28 mL, 0.52 mmol). The resulting solution was stirred at this temperature during one hour and trimethylsilylchloride (0.09 mL, 0.71 mmol) was then added dropwise. After 30 minutes at 20 C. and 20 hours at room temperature, the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel using petroleum ether/ethyl acetate (3/1) as eluent to afford the corresponding silylated phosphine. Colorless oil; Yield 25%; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.26 (d, J=1.5 Hz, 9H, CH.sub.3Si), 7.08-7.18 (m, 13H, Harom), 7.50-7.54 (m, 1H, Harom); 31H NMR (121 MHz, CDCl3) 10.2 (s).

(269) H.2. Synthesis of diphosphine 47b,c with a silano group as bridge

(270) General Procedure

(271) To a solution of o-bromophosphine (II) (0.50 mmol) in dry THF (3 mL) was added dropwise under argon at 78 C. n-BuLi (0.55 mmol). The resulting solution was stirred at this temperature during one hour and dichlorodimethylsilane (0.23 mmol) was then added dropwise. After stirring at room temperature overnight, the reaction mixture was quenched with water (10 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4, filtered and the solvent evaporated giving a residue which was purified by column chromatography on silica gel and/or recristallisation.

(272) H.2.1. Diphosphine 47b

(273) Purification: column chromatography (elution with 3:1 methylene chloride/petroleum ether) and recristallisation in methyl alcohol/methylene chloride. White solid; Yield: 52%; R.sub.f 0.28 (methylene chloride/petroleum ether 3:1); IR (neat) 3045, 2966, 1583, 1478, 1431, 1251, 1108, 831, 809, 737, 694 cm.sup.1; H NMR (300 MHz, CDCl.sub.3) 0.63 (t, J=1.5 Hz, 6H, SiCH.sub.3), 6.90-6.95 (m, 8H, Harom), 7.06-7.21 (m, 18H, Harom), 7.64-7.68 (m, 2H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 2.58 (t, J=10.1 Hz, SiCH.sub.3), 127.9 (Carom), 128.1 (d, J=6.1 Hz, Carom), 128.2 (Carom), 129.1 (Carom), 133.2 (d, J=18.8 Hz, Carom), 135.2 (Carom), 136.3 (dd, J=2.8, 16.0 Hz, Carom), 138.4 (d, J=13.3 Hz, Carom), 143.0 (d, J=12.0 Hz, Carom), 148.0 (dd, J=3.3, 47.5 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 11.2; HRMS calcd for C.sub.38H.sub.34P.sub.2SiNa [M+Na].sup.+ 603.1797. found 603.1778.

(274) H.2.2. Diphosphine 47c:

(275) Purification: column chromatography (elution with 3:1 methylene chloride/petroleum ether). White solid; Yield: 61%; R.sub.f 0.10 (methylene chloride/petroleum ether 3:1); [].sub.D34.0 (c 0.3, CHCl.sub.3) (ee=99%); IR (neat) 3049, 2954, 2833, 1575, 1467, 1271, 1239, 1110, 1023, 814, 741, 695 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.74-0.75 (m, 6H, SiCH.sub.3), 3.66 (s, 6H, OCH.sub.3), 6.66 (ddd, J=1.7, 4.1, 7.3 Hz, 2H, Harom), 6.82-6.86 (m, 4H, Harom), 7.04-7.07 (m, 6H, Harom), 7.17-7.32 (m, 12H, Harom), 7.64-7.66 (m, 2H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 2.62 (dd, J=8.7, 12.6 Hz, SiCH.sub.3), 55.5 (OCH.sub.3), 110.3 (Carom), 120.8 (Carom), 127.3 (d, J=14.2 Hz, Carom), 127.8 (Carom), 127.9 (d, J=6.2 Hz, Carom), 128.7 (Carom), 129.7 (Carom), 133.5 (Carom), 133.6 (Carom), 133.9 (Carom), 134.9 (Carom), 136.4 (dd, J=2.1, 15.7 Hz, Carom), 137.5 (d, J=11.9 Hz, Carom), 142.7 (d, J=11.3 Hz, Carom), 147.1 (dd, J=2.5, 47.1 Hz, Carom), 160.8 (d, J=17.7 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 20.0.

(276) I. Synthesis of 1,2-Diphosphinobenzenes (I-48)

(277) ##STR00039##

(278) TABLE-US-00007 TABLE 7 Synthesis of 1,2-diphosphinobenzenes (I-48) 1,2-diphosphinobenzenes o-bromophenylphosphines (I-48) (II) Rdt e.e. R.sup.1 R.sup.2 R.sup.7 R.sup.8 (%) (%).sup.a (S)-(II-i) Ph o-An 48a Ph Ph 70 99 (S)-(II-i) Ph o-An 48b c-Hex c-Hex 47 99 (S)-(II-i) Ph o-An 48c i-Pr i-Pr 43 99 (S)-(II-i) Ph o-An 48d o-Tol o-Tol 37 99 (S)-(II-i) Ph o-An 48e p-Tol p-Tol 52 99 (S)-(II-i) Ph o-An 48f p-CF.sub.3Ph p-CF.sub.3Ph 58 99 (S)-(II-k) Ph Fc 48g Ph Ph 56 99 (R)-(II-m) Ph iPr 48h Ph Ph 54 98 (II-a) Ph Ph 48i o-Tol Ph 54 99 (S)-(II-i) Ph o-An 48j o-An Ph 52 99 (R)-(II-m) Ph iPr 48k o-An Ph 56 99 .sup.adetermined by HPLC on chiral column
I.1 Synthesis Using Chlorophosphines
General Procedure

(279) To a solution of o-bromoarylphosphine (II) (0.54 mmol) in THF (2 mL) was added at 78 C. under argon n-BuLi (1.6 M in hexane) (0.37 mL, 0.59 mmol) and the resulting solution was stirred at this temperature during one hour. At this time, chlorophosphine (0.65 mmol) was added at 78 C. and the solution was stirred at room temperature overnight. After quenching with water, the mixture was extracted with methylene chloride (35 mL) and the organic phases were dried over MgSO.sub.4. The solvent was evaporated under vacuum to give a residue which was purified by chromatographic column on silica gel and/or recristallisation.

(280) I.1.1. (Sp)-1-Diphenylphosphino-2-(o-anisylphenylphosphino)benzene 48a

(281) Purification: column chromatography (elution with 3:1 petroleum ether/methylene chloride). Analytical pure sample was obtained by recristallisation in methylene chloride/methyl alcohol. White solid; Yield 70%; Enantiomeric excess 99% by HPLC analysis (chiralpak AD, 0.2 mL.Math.min.sup.1, hexane/2-propanol 99:1, t.sub.R (S) 44.5 min, t.sub.R (R) 61.9 min); R.sub.f 0.18 (petroleum ether/methylene chloride 3:1); [].sub.D +58.6 (c 0.3, CHCl.sub.3); IR (neat) 3048, 1581, 1571, 1469, 1431, 1299, 1272, 1240, 1180, 1160, 1129, 1090, 1069, 1022, 793, 743, 719 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.57 (s, 3H, OCH.sub.3), 6.56 (ddd, J=1.7, 4.4, 7.4 Hz, 1H, Harom), 6.67-6.75 (m, 2H, Harom), 6.90-7.00 (m, 2H, Harom), 7.04-7.22 (m, 18H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 55.6 (OCH.sub.3), 110.2 (d, J=1.5 Hz, Carom), 120.8 (Carom), 125.9 (dd, J=6.7, 13.9 Hz, Carom), 128.1 (Carom), 128.2 (Carom), 128.3 (Carom), 129.0 (Carom), 130.0 (Carom), 133.6 (Carom), 133.7 (Carom), 133.8 (Carom), 133.9 (Carom), 134.0 (Carom), 134.1 (Carom), 134.2 (Carom), 134.3 (Carom), 136.5 (dd, J=4.9, 11.0 Hz, Carom), 137.4 (dd, J=5.1, 12.1 Hz, Carom), 143.3 (dd, J=10.7, 21.7 Hz, Carom), 143.6 (dd, J=9.5, 32.5 Hz, Carom), 161.0 (d, J=15.3 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 14.0 (d, J=164.8 Hz), 23.6 (d, J=164.8 Hz); HRMS calcd for C.sub.31H.sub.26OP.sub.2Na [M+Na].sup.+ 499.1351. found 499.1375.

(282) I.1.2. (Sp)-1-dicyclohexylphosphino-2-(o-anisylphenylphosphino)-benzene 48b

(283) Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate). White solid; Yield 47%; Enantiomeric excess 99% by HPLC analysis (Lux 5 Cellulose 2, 0.5 mL.Math.min.sup.1, hexane/2-propanol 98:2, t.sub.R (S) 7.6 min, t.sub.R (R) 10.7 min); R.sub.f 0.62 (petroleum ether/ethyl acetate 3:1); [].sub.D +57.1 (c 0.3, CHCl.sub.3); IR (neat) 2922, 2847, 1582, 1571, 1471, 1445, 1430, 1241, 1041, 836, 752, 695 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.00-1.20 (m, 10H, Hcy), 1.48-1.79 (m, 12H, Hcy), 3.62 (s, 3H, OCH.sub.3), 6.54 (ddd, J=1.5, 3.6, 7.2 Hz, 1H, Harom), 6.73-6.85 (m, 3H, Harom), 7.09-7.7.27 (m, 9H, Harom), 7.43-7.47 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 26.4 (d, J=8.6 Hz, CH.sub.2), 27.0-27.5 (m, CH.sub.2), 28.8 (d, J=7.8 Hz, CH.sub.2), 29.1 (d, J=10.5 Hz, CH.sub.2), 34.0 (dd, J=5.4, 14.7 Hz, CH), 34.9 (dd, J=4.3, 15.4 Hz, CH), 55.6 (OCH.sub.3), 110.1 (Carom), 120.8 (Carom), 127.5 (dd, J=9.1, 17.7 Hz, Carom), 127.8 (Carom), 128.0-128.1 (m, Carom), 128.6 (Carom), 129.7 (Carom), 132.4 (dd, J=2.2, 6.2 Hz, Carom), 133.4 (d, J=7.5 Hz, Carom), 134.2 (Carom), 134.3 (Carom), 134.6 (Carom), 137.3 (dd, J=3.8, 15.2 Hz, Carom), 141.7 (dd, J=17.0, 31.2 Hz, Carom), 146.2 (dd, J=8.2, 32.4 Hz, Carom), 160.8 (d, J=15.8 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 12.2 (d, J=167.8 Hz), 23.2 (d, J=167.8 Hz); HRMS calcd for C.sub.31H.sub.38OP.sub.2Na [M+Na].sup.+ 511.2290. found 511.2295.

(284) I.1.3. (Sp)-1-di-i-propylphosphino-2-(o-anisylphenylphosphino)benzene 48c

(285) Purification: column chromatography (elution with 3:1 petroleum ether/ethyl acetate). Colorless sticky oil; Yield 43%; Enantiomeric excess 99% by HPLC analysis (Lux 5 Cellulose 2, 0.3 mL.Math.min.sup.1, hexane/2-propanol 98:2, t.sub.R (S) 12.8 min, t.sub.R (R) 14.7 min); R.sub.f 0.63 (petroleum ether/ethyl acetate 3:1); [].sub.D +85.0 (c 0.5 CHCl.sub.3); IR (neat) 2948, 2864, 1572, 1461, 1429, 1271, 1240, 1180, 1104, 1070, 1025, 879, 746 cm.sup.1; .sup.1H NMR (300 MHz, C.sub.6D.sub.6) 0.90 (dd, J=7.2, 12.0 Hz, 3H, CH.sub.3), 1.12 (dd, J=7.2, 10.8 Hz, 3H, CH.sub.3), 1.24 (dd, J=7.2, 13.8 Hz, 3H, CH.sub.3), 1.36 (dd, J=7.2, 14.4 Hz, 3H, CH.sub.3), 2.12-2.18 (m, 2H, CH), 3.30 (s, 3H, OCH.sub.3), 6.61 (dd, J=4.4, 8.1 Hz, 1H, Harom), 6.86 (t, J=7.4 Hz, 1H, Harom), 7.06-7.11 (m, 2H, Harom), 7.18-7.24 (m, 5H, Harom), 7.31-7.33 (m, 1H, Harom), 7.46-7.48 (m, 1H, Harom), 7.57-7.60 (m, 2H, Harom); .sup.13C NMR (75.5 MHz, C.sub.6D.sub.6) 19.2 (d, J=9.3 Hz, CH.sub.3), 19.5 (d, J=12.5 Hz, CH.sub.3), 20.1 (d, J=18.7 CH.sub.3), 20.2 (dd, J=1.9, 18.6 Hz, CH.sub.3), 24.3 (dd, J=5.6, 15.7 Hz, CH), 25.0 (dd, J=4.5, 16.6 Hz, CH), 54.9 (OCH.sub.3), 110.1 (Carom), 121.0 (Carom), 128.1 (Carom), 128.2 (Carom), 128.3 (Carom), 128.8 (Carom), 129.7 (Carom), 132.2 (d, J=2.3 Hz, Carom), 132.3 (d, J=2.8 Hz, Carom), 133.4 (d, J=7.8 Hz, Carom), 134.6 (Carom), 134.9 (Carom), 135.0 (Carom), 138.2 (dd, J=4.9, 14.7 Hz, Carom), 142.1 (d, J=19.4 Hz, Carom), 142.3 (d, J=18.8 Hz, Carom), 147.1 (dd, J=11.2, 32.7 Hz, Carom), 161.2 (d, J=15.1 Hz, Carom); .sup.31P NMR (121 MHz, C.sub.6D.sub.6) 3.7 (d, J=165.0 Hz), 20.7 (d, J=165.0 Hz); HRMS calcd for C.sub.25H.sub.30OP.sub.2Na [M+Na].sup.+ 431.1664. found 431.1682.

(286) I.1.4. (Sp)-1-di(o-tolyl)phosphino-2-(o-anisyl-phenylphosphino)benzene 48d

(287) Purification: column chromatography (elution with 3:1 toluene/petroleum ether) and recristallisation in methylene chloride/methyl alcohol. White solid; Yield 37%; Enantiomeric excess 99% by HPLC analysis (Lux 5 Cellulose 2, 0.5 mL.Math.min.sup.1, hexane/2-propanol 98:2, t.sub.R (S) 8.2 min, t.sub.R (R) 9.6 min); R.sub.f 0.39 (toluene/petroleum ether 3:1); [].sub.D +73.0 (c 0.2, CHCl.sub.3); IR (neat) 3050, 2929, 2834, 1573, 1469, 1429, 1272, 1241, 1130, 1108, 1070, 1025, 745 cm.sup.1; .sup.1H NMR (300 MHz, C.sub.6D.sub.6) 2.38 (s, 3H, CH.sub.3), 2.54 (s, 3H, CH.sub.3), 3.23 (s, 3H, OCH.sub.3), 6.56 (dd, J=4.2, 7.8 Hz, 1H, Harom), 6.82-6.85 (m, 1H, Harom), 7.01-7.26 (m, 14H, Harom), 7.27-7.30 (m, 2H, Harom), 7.38-7.39 (m, 1H, Harom), 7.53-7.55 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, C.sub.6D.sub.6) 21.1 (d, J=21.1 Hz, CH.sub.3), 21.3 (d, J=21.1 Hz, CH.sub.3), 54.9 (OCH.sub.3), 126.0 (d, J=5.7 Hz, Carom), 126.9 (dd, J=6.9, 16.0 Hz, Carom), 128.1 (Carom), 128.2 (Carom), 128.3 (d, J=3.1 Hz, Carom), 128.5 (d, J=6.9 Hz, Carom), 129.1 (d, 4.6 Hz, Carom), 129.8 (Carom), 130.2 (2d, J=5.1 Hz; J=4.7 Hz, 2Carom), 133.7 (Carom), 133.9 (Carom), 134.0 (d, J=6.9 Hz, Carom), 134.1 (d, J=7.0 Hz, Carom), 134.2 (Carom), 134.4 (Carom), 134.6 (Carom), 136.1-136.3 (m, Carom), 137.5 (dd, J=4.7, 13.6 Hz, Carom), 142.7 (2dd, J=9.9, 34.0 Hz; J=15.2, 26.7 Hz, 2Carom), 155.7 (dd, J=11.1, 32.8 Hz, Carom), 162.2 (d, J=15.3 Hz, Carom); .sup.31P NMR (121 MHz, C.sub.6D.sub.6) 22.0 (d, J=172.5 Hz), 26.3 (d, J=172.5 Hz); HRMS calcd for C.sub.33H.sub.31OP.sub.2 [M+H].sup.+ 505.1845. found 505.1841.

(288) I.1.5. (Sp)-1-di(p-tolyl)phosphino-2-(o-anisyl-phenylphosphino)benzene 48e

(289) Purification: column chromatography (elution with 2:1 toluene/petroleum ether). White solid; Yield 52%; Enantiomeric excess 99% by HPLC analysis (Lux 5 Cellulose 2, 0.5 mL.Math.min.sup.1, hexane/2-propanol 90:10, t.sub.R (S) 8.0 min, t.sub.R (R) 10.9 min); R.sub.f 0.17 (toluene/petroleum ether 2:1); [].sub.D +58.0 (c 0.3, CHCl.sub.3); IR (neat) 3046, 2963, 2919, 1572, 1496, 1470, 1429, 1396, 1260, 1240, 1184, 1090, 1020, 803, 750, 696 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 2.32-2.33 (2s, 6H, CH.sub.3), 3.67 (s, 3H, OCH.sub.3), 6.62 (ddd, J=1.7, 4.3, 7.4 Hz, 1H, Harom), 6.76-6.84 (m, 2H, Harom), 6.99-7.31 (m, 18H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 20.2 (CH.sub.3), 20.3 (CH.sub.3), 54.5 (OCH.sub.3), 109.1 (d, J=1.3 Hz, 5 Carom), 119.7 (Carom), 125.0 (dd, J=6.5, 13.9 Hz, Carom), 127.0 (Carom), 127.1 (Carom), 127.6 (Carom), 127.8 (Carom), 127.9 (d, J=3.0 Hz, Carom), 128.0 (d, J=2.7 Hz, Carom), 128.8 (Carom), 132.6 (d, J=7.6 Hz, Carom), 132.7-133.2 (m, Carom), 135.6 (dd, J=4.8, 11.5 Hz, Carom), 136.9 5carom), 137.0 (Carom), 142.2 (dd, J=10.1, 31.6 Hz, Carom), 143.2 (dd, J=11.2, 32.4 Hz, Carom), 160.0 (d, J=15.4 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 15.4 (d, J=162.8 Hz), 24.1 (d, J=162.8 Hz); HRMS calcd for C.sub.33H.sub.30OP.sub.2Na [M+Na].sup.+ 527.1664. found 527.1687.

(290) I.1.6. (Sp)-1-di(p-trifluoromethylphenyl)phosphino-2-(o-anisylphenylphosphino)benzene 48f

(291) Purification: column chromatography (elution with 2:1 toluene/petroleum ether). White solid; Yield 58%; Enantiomeric excess 99% by HPLC analysis (Lux 5 Cellulose 2, 0.3 mL.Math.min, hexane/2-propanol 90:10, t.sub.R (S) 11.3 min, t.sub.R (R) 13.1 min); R.sub.f 0.56 (toluene/petroleum ether 2:1); [].sub.D +52.9 (c 0.3, CHCl.sub.3); IR (neat) 3050, 2933, 1431, 1397, 1320, 1242, 1163, 1120, 1105, 1059, 1015, 830, 750, 696 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.57 (s, 3H, OCH.sub.3), 6.48-6.52 (m, 1H, Harom), 6.65-6.74 (m, 2H, Harom), 6.90-7.01 (m, 2H, Harom), 7.06-7.25 (m, 12H, Harom), 7.35 (d, J=7.8 Hz, 2H, Harom), 7.41 (d, J=7.8 Hz, 2H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 55.6 (OCH.sub.3), 120.9 (Carom), 124.0 (2q, J=272.4 Hz, 2CF.sub.3), 124.9-125.1 (m, Carom), 128.2 (Carom), 128.4 (d, J=7.3 Hz, Carom), 128.7 (Carom), 129.1 (Carom), 129.3 (Carom), 129.6 (Carom), 130.4 (Carom), 130.5 (q, J=32.4 Hz, Carom), 133.9-134.2 (m, Carom), 134.5 (Carom), 135.6 (dd, J=4.5, 10.1 Hz, Carom), 140.8 (d, J=9.8 Hz, Carom), 141.3-141.8 (m, Carom), 144.2 (dd, J=10.5, 32.8 Hz, Carom), 161.0 (d, J=15.4 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 14.5 (d, J=164.5 Hz), 24.0 (d, J=164.5 Hz); .sup.19F NMR (282 MHz, CDCl.sub.3) 62.8 (2s, CF.sub.3); HRMS calcd for C.sub.33H.sub.24OF.sub.6P.sub.2Na [M+Na].sup.+ 635.1099. found 635.1103.

(292) I.1.7. (Rp)-1-diphenylphosphino-2-(ferrocenylphenylphosphino)benzene 48 g

(293) To a solution of (S)-ferrocenyl-(2-bromophenyl)-phenylphosphine (II-k) (0.20 g, 0.45 mmol) in THF (2 mL) was added at 78 C. under argon n-BuLi (1.6 M in hexane) (0.37 mL, 0.50 mmol) and the resulting solution was stirred at this temperature during one hour. At this time, chlorodiphenylphosphine (0.09 mL, 0.54 mmol) was added at 78 C. and the solution was stirred at room temperature overnight. After quenching with water, the mixture was extracted with methylene chloride (35 mL) and the organic phases were dried over MgSO.sub.4. The solvent was evaporated under vacuo to give a residue which was purified by chromatographic column on silica gel using toluene/petroleum ether (1/1) as eluent and recristallisation in methylene chloride/acetone.

(294) Purification: column chromatography (elution with 1:1 toluene/petroleum ether) and recristallisation in methylene chloride/acetone. Orange solid; Yield: 56%; Enantiomeric excess 99% by HPLC analysis (Lux 5 Cellulose 2, 1.0 mL.Math.min.sup.1, hexane/2-propanol 98:2, t.sub.R (S) 5.5 min, t.sub.R (R) 7.9 min); R.sub.f 0.34 (toluene/petroleum ether 1:1); [].sub.D 55.5 (c 0.2, CHCl.sub.3); IR (neat) 3048, 1585, 1567, 1478, 1433, 1307, 1193, 1158, 1106, 1069, 1025, 1000, 888 cm; .sup.1H NMR (300 MHz, C.sub.6D.sub.6) 4.04 (sl, 1H, Cp), 4.19 (sl, 5H, Cp), 4.22 (sl, 1H, Cp), 4.26 (sl, Cp), 4.37 (sl, 1H, Cp), 7.04-7.18 (m, 11H, Harom), 7.30-7.34 (m, 3H, Harom), 7.54-7.56 (m, 5H, Harom); .sup.13C NMR (75.5 MHz, C.sub.6D.sub.6) 69.4 (Cfer), 70.6 (Cfer), 71.2 (d, J=5.3 Hz, Cfer), 72.7 (d, J=5.4 Hz, Cfer), 73.8 (d, J=24.1 Hz, Cfer), 77.4 (d, J=11.1 Hz, Cfer), 128.1 (Carom), 128.2 (2s, 2Carom), 128.3 (Carom), 128.5 (d, J=5.8 Hz, Carom), 128.8 (d, J=6.3 Hz, Carom), 133.6 (Carom), 133.7 (Carom), 133.8 (Carom), 134.2 (Carom), 134.4 (2s, 2Carom), 134.5 (Carom), 137.4 (dd, J=4.0, 12.5 Hz, Carom), 138.6 (dd, J=7.9, 14.0 Hz, Carom), 139.1 (d, J=9.8 Hz, Carom), 142.9 (dd, J=12.3, 30.8 Hz, Carom), 146.9 (dd, J=13.7, 32.3 Hz, Carom); .sup.31P NMR (121 MHz, C.sub.6D.sub.6) 13.6 (d, J=155.5 Hz), 24.6 (d, J=155.5 Hz); HRMS calcd for C.sub.34H.sub.28FeP.sub.2Na [M+Na]+ 577.0908. found 577.0935.

(295) I.1.8. (Rp)-1-diphenylphosphino-2-(isopropylphenylphosphino)benzene 48h

(296) To a solution of (R)-(2-bromophenyl)-isopropylphenylphosphine (II-m) (0.14 g, 0.45 mmol) in THF (2 mL) was added at 78 C. under argon n-BuLi (1.6 M in hexane) (0.37 mL, 0.50 mmol) and the resulting solution was stirred at this temperature during one hour. At this time, chlorodiphenylphosphine (0.09 mL, 0.54 mmol) was added at 78 C. and the solution was stirred at room temperature overnight. After quenching with water, the mixture was extracted with methylene chloride (35 mL) and the organic phases were dried over MgSO.sub.4. The solvent was evaporated under vacuo to give a residue which was purified by chromatographic column on silica gel using petroleum ether/toluene (2/1) as eluent.

(297) White solid; Yield: 54%; Enantiomeric excess: 98% by HPLC analysis after transformation to the corresponding dithiophosphine (Lux 5 Cellulose 2, 0.8 mL.Math.min, hexane/2-propanol 80:20, t.sub.R (R)=16.2 min, t.sub.R (S)=18.2 min; R.sub.f 0.39 (petroleum ether/toluene 2:1); [].sub.D +61.7 (c 0.3, CHCl.sub.3); IR (neat) 3050, 2962, 2923, 2864, 1477, 1433, 1381, 1363, 1305, 1270, 1229, 1181, 1155, 1091, 1069, 1025, 999, 745, 695, 648 cm.sup.1; H NMR (300 MHz, CDCl.sub.3) 1.07 (ddd, J=2.6, 6.8, 13.6 Hz, 3H, CH.sub.3), 1.11 (ddd, J=2.9, 6.8, 12.8 Hz, 3H, CH.sub.3), 2.48-2.55 (m, 1H, CH), 6.94-6.97 (m, 1H, Harom), 7.07-7.35 (m, 16H, Harom), 7.38 (td, J=1.3, 7.5 Hz, 1H, Harom), 7.66-7.68 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 19.5 (dd, J=3.4, 18.4 Hz, CH.sub.3), 19.7 (dd, J=3.4, 16.2 Hz, CH.sub.3), 25.9 (dd, J=4.6, 7.1 Hz, CH), 127.9 (Carom), 128.0 (Carom), 128.1 (Carom), 128.2 (2s, Carom), 128.3 (Carom), 128.4 (Carom), 128.7 (Carom), 128.9 (Carom), 131.9 (d, J=5.1 Hz, Carom), 133.3 (d, J=3.4 Hz, Carom), 133.4 (d, J=3.7 Hz, Carom), 133.9 (d, J=6.1 Hz, Carom), 134.0 (t, J=4.1 Hz, Carom), 134.2 (t, J=4.4 Hz, Carom), 136.9 (d, J=9.5 Hz, Carom), 137.7 (d, J=11.8 Hz, Carom), 138.0 (dd, J=5.3, 10.2 Hz, Carom), 143.5 (dd, J=6.5, 22.8 Hz, Carom), 144.8 (dd, J=3.9, 25.0 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 13.1 (d, J=155.8 Hz), 14.2 (d, J=155.8 Hz); HRMS calcd for C.sub.27H.sub.27P.sub.2 [M+H].sup.+ 413.1582. found 413.1586.

(298) I.2. Synthesis using phenyl phosphinites

(299) I.2.1. (Sp)-1-diphenylphosphino-2-(o-tolylphenylphosphino)benzene 48i

(300) To a solution of o-bromodiphenylphosphine (II-a) (0.20 g, 0.59 mmol) in THF (3 mL) was added at 78 C. under argon n-BuLi (1.6 M in hexane) (0.41 mL, 0.65 mmol) and the resulting solution was stirred at this temperature during one hour. At this time, a solution of (R)-phenyl-o-tolylphenylphosphinite (0.17 g, 0.59 mmol) in THF (2 mL) was added dropwise at 78 C. and the mixture was stirred at room temperature overnight. After quenching with water, the mixture was extracted with methylene chloride (35 mL) and the organic phases were dried over MgSO.sub.4. The solvent was evaporated under vacuo to give a residue which was purified by chromatographic column on silica gel using toluene/petroleum ether (1/1) as eluent.

(301) Colorless sticky solid; Yield: 54%; Enantiomeric excess: 99% by HPLC analysis (Lux 5 Cellulose 2, 0.2 mL.Math.min.sup.1, hexane/2-propanol 98:2, t.sub.R (S)=19.5 min, t.sub.R (R)=20.8 min; R.sub.f 0.43 (petroleum ether/toluene 1:1); [].sub.D +33.0 (c 0.3 CHCl.sub.3); IR (neat) 3051, 1584, 1477, 1433, 1269, 1068, 998, 739, 693 cm.sup.1; .sup.1H NMR (300 MHz, C.sub.6D.sub.6) 2.45 (d, J=0.8 Hz, 3H, CH.sub.3), 7.00-7.07 (m, 3H, Harom), 7.08-7.19 (m, 12H, Harom), 7.30-7.32 (m, 1H, Harom), 7.36-7.38 (m, 1H, Harom), 7.43-7.48 m, 6H, Harom); .sup.13C NMR (75.5 MHz, C.sub.6D.sub.6) 21.2 (d, J=22.6 Hz, CH.sub.3), 126.0 (Carom), 128.3 (Carom), 128.4 (m, Carom), 128.5 (Carom), 128.6 (d, J=7.3 Hz, Carom), 129.2 (d, J=6.2 Hz, Carom), 130.2 (d, J=4.5 Hz, Carom), 133.7 (Carom), 133.8 (Carom), 134.0 (Carom), 134.1 (Carom), 134.2 (d, J=18.7 Hz, Carom), 134.3 (Carom), 134.4 (Carom), 134.5 (Carom), 136.7 (dd, J=5.6, 13.3 Hz, Carom), 137.0 (dd, J=5.6, 13.3 Hz, Carom), 137.7 (dd, J=6.1, 12.8 Hz, Carom), 138.0 (dd, J=6.1, 12.8 Hz, Carom), 142.4 (d, J=26.2 Hz, Carom), 143.8 (dd, J=11.7, 32.9 Hz, Carom), 144.4 (dd, J=12.2, 33.2 Hz, Carom); .sup.31P NMR (121 MHz, C.sub.6D.sub.6) 12.7 (d, J=154.0 Hz), 19.8 (d, J=154.0 Hz); HRMS calcd for C.sub.31H.sub.26P.sub.2Na [M+Na].sup.+ 483.1402. found 483.1423.

(302) I.2.2. (S,S)-Bis[1,2-(o-anisyl-phenyl)phosphino]benzene 48j

(303) To a solution of (S)-o-anisyl-(o-bromo)phenylphosphine (II-i) (0.22 g, 0.59 mmol) in THF (3 mL) was added at 78 C. under argon n-BuLi (1.6 M in hexane) (0.41 mL, 0.65 mmol) and the resulting solution was stirred at this temperature during one hour. At this time, a solution of (R)-phenyl-o-anisylphenylphosphinite (0.18 g, 0.59 mmol) in THF (2 mL) was added dropwise at 78 C. and the mixture was stirred at room temperature overnight. After quenching with water, the mixture was extracted with methylene chloride (35 mL) and the organic phases were dried over MgSO.sub.4. The solvent was evaporated under vacuo to give a residue which was purified by chromatographic column on silica gel using methylene chloride/petroleum ether (2/1) as eluent and recristallisation in methylene chloride/methyl alcohol.

(304) White solid; Yield: 52%; Enantiomeric excess: 99% by .sup.31P NMR in the presence of (+)-di--chlorobis{2-[1-(dimethylamino)ethyl]phenyl-C,N}dipalladium; R.sub.f 0.39 (methylene chloride/petroleum ether 2:1); [].sub.D+116.2 (c 0.4, CHCl.sub.3); IR (neat) 3055, 2937, 2832, 1571, 1469, 1429, 1295, 1270, 1239, 1178, 1157, 1130, 1093, 1069, 1039, 1023, 1012, 792, 745, 730, 690 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.57 (s, 6H, OCH.sub.3), 6.69-6.72 (m, 2H, Harom), 6.80-6.84 (m, 4H, Harom), 6.99-7.02 (m, 2H, Harom), 7.24-7.32 (m, 14H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 55.5 (OCH.sub.3), 110.2 (Carom), 120.8 (Carom), 126.6 (t, J=3.6 Hz, Carom), 128.1 (3s, Carom), 128.9 (Carom), 129.8 (Carom), 133.5 (t, J=3.2 Hz, Carom), 133.9 (Carom), 134.0 (Carom), 134.1 (Carom), 134.2 (Carom), 136.9 (t, J=3.9 Hz, Carom), 143.3 (t, J=11.9 Hz, Carom), 161.0 (d, J=6.9 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 23.4 (s); HRMS calcd for C.sub.32H.sub.38O.sub.2P.sub.2Na[M+Na].sup.+ 507.1637. found 507.1637.

(305) I.2.3. (1R,2S)-(+)-1-(i-Propylphenylphosphino)-2-(o-anisylphenylphosphino)-benzene 48k

(306) To a solution of (R)-isopropyl-(2-bromophenyl)-phenylphosphine (II-m) (0.18 g, 0.59 mmol) in THF (3 mL) was added at 78 C. under argon n-BuLi (1.6 M in hexane) (0.41 mL, 0.65 mmol) and the resulting solution was stirred at this temperature during one hour. At this time, a solution of (R)-phenyl-o-anisylphenylphosphinite (0.18 g, 0.59 mmol) in THF (2 mL) was added dropwise at 78 C. and the mixture was stirred at room temperature overnight. After quenching with water, the mixture was extracted with methylene chloride (35 mL) and the organic phases were dried over MgSO.sub.4. The solvent was evaporated under vacuo to give a residue which was purified by chromatographic column on silica gel using methylene chloride/petroleum ether (2/1) as eluent.

(307) White sticky solid; Yield: 56%; Enantiomeric excess: 99% by HPLC analysis (Chiralpak AD, 0.2 mL.Math.min.sup.1, hexane/2-propanol 98:2, t.sub.R (RS)=24.5 min, t.sub.R (SS)=27.5 min; R.sub.f 0.44 (petroleum ether/methylene chloride 1:2); []D+85.0 (c 0.2 CHCl.sub.3); IR (neat) 2954, 1575, 1461, 1429, 1271, 1239, 1179, 1129, 1070, 1023, 745, 695 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 6.81 (td, J=6.8, 15.4 Hz, 6H, CH.sub.3), 2.47-2.57 (m, 1H, CH), 3.61 (s, 3H, OCH.sub.3), 6.47 (ddd, J=1.5, 3.8, 7.2 Hz, 1H, Harom), 6.65 (t, J=7.4 Hz, 1H, Harom), 6.79 (ddd, J=0.7, 4.7, 8.2 Hz, 1H, Harom), 6.89-6.92 (m, 1H, Harom), 7.14-7.24 (m, 5H, Harom), 7.30-7.39 (m, 8H, Harom), 7.61-7.64 (m, 1H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 19.5 (CH.sub.3), 19.7 (CH.sub.3), 25.6 (dd, J=8.1, 10.7 Hz, CH), 55.6 (OCH.sub.3), 110.1 (d, J=1.4 Hz, Carom), 120.7 (Carom), 126.0 (dd, J=5.2, 13.7 Hz, Carom), 127.8 (d, J=7.2 Hz, Carom), 128.0 (Carom), 128.2 (2s, Carom), 128.8 (d, J=17.2 Hz, Carom), 129.8 (Carom), 131.7 (d, J=6.4 Hz, Carom), 133.3 (d, J=19.2 Hz, Carom), 134.0 (Carom), 134.0 (d, J=7.2 Hz, Carom), 134.2 (Carom), 134.4 (Carom), 137.3 (dd, J=7.3, 13.8 Hz, Carom), 138.3 (d, J=2.9 Hz, Carom), 143.8 (dd, J=13.9, 31.6 Hz, Carom), 144.9 (d, J=10.1 Hz, Carom), 160.9 (d, J=13.5 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 13.5 (d, J=163.2 Hz), 24.6 (d, J=163.2 Hz); HRMS calcd for C.sub.28H.sub.29OP.sub.2[M+H].sup.+ 443.1688. found 443.1667.

(308) J. Synthesis of Diphosphines with a Biphenyl Bridge (I-49)

(309) ##STR00040##

(310) TABLE-US-00008 TABLE 8 Synthesis of diphosphines with a biphenyl bridge (I-49) Diphosphine (I-49) o-Bromophenylphosphine (II) Rdt e.e. R.sup.1 R.sup.2 (%) (%) (II-a) Ph Ph 49a 46 (II-e) o-Tol o-Tol 49b 36 (R)-(II-k) Fc Ph (S,S)-49c 35.sup.a 99 (R)-(II-n) Ph c-Hex (R,R)-49d 27 (S)-(II-o) Ph o-Tol (S,S)-49e 45 .sup.aisolated as a diborane complex
J.1. bis-2,2-(Diphenylphosphino)biphenyle 49a

(311) To a solution of (2-bromophenyl)-diphenylphosphine (II-a) (0.41 g, 1.20 mmol) in THF (5 mL) was added at 78 C. under argon n-BuLi (1.6 M in hexane) (0.75 mL, 1.20 mmol) and the resulting solution was stirred at this temperature during one hour. A solution of Fe(acac).sub.3 (0.52 g, 1.44 mmol) in THF (7 mL) was then added and the stirring was maintained during one hour at 78 C. The solution was quenched with water (2 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4 and the solvent evaporated under vacuo to give a residue which was purified by chromatographic column on silica gel using petroleum ether/methylene chloride (2/1) as eluent. The titled compound was obtained as white solid. Yield: 46%; Rf 0.32 (petroleum ether/CH.sub.2Cl.sub.2 2/1); .sup.1H NMR (300 MHz, CDCl.sub.3) 6.80-6.84 (m, 2H, Harom), 6.98-7.01 (m, 2H, Harom), 7.04-7.22 (m, 24H, H arom); .sup.31P NMR (121 MHz, CDCl.sub.3) 14.4. Noteworthy, the coupling of (II-a) was also carried out with FeCl.sub.3 or Cu(OAc).sub.2 and the diphosphine 49a was obtained in satisfactory yields (30-45%).

(312) J.2. bis-2,2-(di-o-tolylphosphino)biphenyle 49b

(313) To a solution of (2-bromophenyl)-di(o-tolyl)phosphine (II-e) (0.44 g, 1.20 mmol) in THF (5 mL) was added at 78 C. under argon n-BuLi (1.6 M in hexane) (0.82 mL, 1.32 mmol) and the resulting solution was stirred at this temperature during one hour. A solution of Fe(acac).sub.3 (0.52 g, 1.44 mmol) in THF (7 mL) was then added and the stirring was maintained during one hour at 78 C. The solution was quenched with water (2 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4 and the solvent evaporated under vacuo to give a residue which was purified by chromatographic column on silica gel using petroleum ether/toluene (20/1) as eluent. The titled compound was obtained as white solid. Yield: 36%; Rf 0.41 (petroleum ether/toluene 20/1); IR (neat) 3050, 3002, 1450, 1428, 1380, 1267, 1201, 1129, 1034, 951, 877, 801, 751, 717 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 2.11 (s, 6H, CH.sub.3), 2.44 (sl, 6H, CH.sub.3), 6.77-6.78 (m, 2H, Harom), 6.92-6.93 (m, 2H, Harom), 6.97-7.01 (m, 4H, Harom), 7.06-7.09 (m, 2H, Harom), 7.12-7.15 (m, 4H, Harom), 7.19 (td, J=1.4, 7.5 Hz, 2H, Harom), 7.23-7.29 (m, 6H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 20.9 (d, J=24.1 Hz, CH.sub.3), 21.5 (t, J=12.1 Hz, CH.sub.3), 125.7 (d, J=6.6 Hz, Carom), 127.2 (Carom), 127.4 (Carom), 128.2 (Carom), 128.6 (Carom), 129.6 (t, J=3.0 Hz, Carom), 129.9 (t, J=2.0 Hz, Carom), 131.2 (dd, J=4.2, 3.7 Hz, Carom), 132.6 (Carom), 133.1 (Carom), 135.2 (Carom), 135.6 (d, J=14.4 Hz, Carom), 135.7 (Carom), 136.1 (d, J=24.1 Hz, Carom), 143.0 (d, J=25.7 Hz, Carom), 143.3 (d, J=28.3 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 28.5. HRMS calcd for C.sub.40H.sub.36P.sub.2Na (M+Na).sup.+ 601.2185. found 601.2164.

(314) J.3. Synthesis of (S,S)-bis-2,2-(ferrocenylphenylphosphino)biphenyl diborane and free diphosphine 49c

(315) To a solution of (S)-Ferrocenyl-(2-bromophenyl)-phenylphosphine (II-k) (0.20 g, 0.44 mmol) in THF (4 mL) was added at 78 C. under argon n-BuLi (1.6 M in hexane) (0.30 mL, 0.48 mmol) and the resulting solution was stirred at this temperature during one hour. A solution of Fe(acac).sub.3 (0.19 g, 0.53 mmol) in THF (5 mL) was then added and the stirring was maintained during one hour at 78 C. The solution was quenched with water (2 mL) and extracted with methylene chloride (310 mL). The organic phases were dried over MgSO.sub.4 and the solvent evaporated under vacuo to give a residue which was purified by chromatographic column on silica gel using petroleum ether/ethyl acetate (20/1) as eluent. The orange powder obtained was dissolved in THF and BH.sub.3.DMS was added. After stirring overnight, water was added (1 mL) and the solution was extracted with methylene chloride (35 mL). The organic phases were dried over MgSO.sub.4 and the solvent evaporated to give an orange solid which was recristallised in a mixture of hexane and methylene chloride. The titled diborane compound was obtained as orange crystals. Yield: 35%; Enantiomeric excess: 99% by HPLC analysis (chiralcel OD-H, 0.5 mL.Math.min.sup.1, hexane-2-propanol 98:2, t.sub.R (S,S)=27.2 min, t.sub.R (R,R)=30.9 min; R.sub.f 0.42 (petroleum ether/ethyl acetate 3:1); [].sub.D 58.3 (c 0.3, CHCl.sub.3); IR (neat) 3053, 2435, 2371, 2338, 1459, 1435, 1171, 1106, 1057, 1026, 1001, 823, 742, 697 cm.sup.1; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.89 (s, 10H, Cp), 4.16 (sl, 2H, Cp), 4.21 (sl, 2H, Cp), 4.32-4.34 (m, 4H, Cp), 6.67-6.68 (m, 2H, Harom), 6.97-7.14 (m, 6H, Harom), 7.52-7.57 (m, 6H, Harom), 7.91-7.97 (m, 4H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 69.7 (Cp), 69.8 (d, J=68.1 Hz, Cp), 70.9 (d, J=5.3 Hz, Cp), 71.0 (d, J=7.9 Hz, Cp), 72.7 (d, J=1.6 Hz, Cp), 75.0 (d, J=18.2 Hz, Cp), 127.2 (d, J=9.0 Hz, Carom), 128.3 (d, J=10.2 Hz, Carom), 129.2 (d, J=2.1 Hz, Carom), 130.3 (d, J=54.0 Hz, Carom), 131.0 (d, J=2.2 Hz, Carom), 132.2 (d, J=61.5 Hz, Carom), 132.6 (d, J=7.7 Hz, Carom), 133.5 (d, J=9.2 Hz, Carom), 134.0 (d, J=8.3 Hz, Carom), 143.6 (dd, J=3.2, 9.7 Hz, Carom); .sup.31P NMR (121 MHz, CDCl.sub.3) 17.2; HRMS calcd for C.sub.44H.sub.42P.sub.2B.sub.2Fe.sub.2Na (M+Na).sup.+ 789.1539. found 789.1549; Anal calcd for C.sub.44H.sub.42P.sub.2B.sub.2Fe.sub.2: C, 68.99; H, 5.53. found: C, 69.27; H, 5.43.

(S,S)-bis-2, 2-(Ferrocenylphenylphosphino)biphenyl 49c

(316) A solution of the diphosphine diborane (0.06 g, 0.08 mmol) and DABCO (0.05 g, 0.48 mmol) in dry toluene (4 mL) was stirred at room temperature overnight. After evaporation of the solvent in vacuo, the residue was purified by chromatographic column on silica gel using petroleum ether/ethyl acetate (3/1) as eluent to give the titled compound as an orange solid. Yield: 90%; Enantiomeric excess: 99% by HPLC analysis (chiralcel OD-H, 0.3 mL.Math.min.sup.1, hexane-2-propanol 98:2, t.sub.R (R,R)=19.6 min, t.sub.R (S,S)=22.3 min; R.sub.f 0.21 (petroleum ether/ethyl acetate 20:1); [].sub.D 129.3 (c 0.2, CHCl.sub.3); IR (neat) 3069, 2925, 1477, 1454, 1431, 1411, 1306, 1260, 1192, 1158, 1107, 1019, 1000, 815, 747, 699 cm; .sup.1H NMR (300 MHz, CDCl.sub.3) 3.82 (sl, 2H, Cp), 4.20 (s, 10H, Cp), 4.43-4.44 (m, 2H, Cp), 4.55 (sl, 2H, Cp), 4.82-4.83 (m, 2H, Cp), 6.53-6.54 (m, 2H, Harom), 7.05 (td, J=1.3, 7.4 Hz, 2H, Harom), 7.20-7.22 (m, 2H, Harom), 7.27 (td, J=1.2, 7.4 Hz, 2H, Harom), 7.28-7.34 (m, 10H, Harom); .sup.13C NMR (75.5 MHz, CDCl.sub.3) 69.2 (Cp), 69.8 (Cp), 71.0 (t, J=3.5 Hz, Cp), 71.5 (Cp), 74.5 (t, J=17.1 Hz, Cp), 127.1 (Carom), 127.5 (Carom), 127.7 (t, J=3.7 Hz, Carom), 128.3 (Carom), 130.2 (t, J=3.8 Hz, Carom), 132.4 (Carom), 134.4 (t, J=10.7 Hz, Carom), 137.9 (dd, J=4.0, 4.7 Hz, Carom), 138.9 (t, J=4.7 Hz, Carom), 145.6 (t, J=17.1 Hz, Carom); .sup.31P NMR (121 MHz, CDCl3) 23.6; HRMS calcd for C.sub.44H.sub.36P.sub.2Fe.sub.2Na (M+Na).sup.+761.0883. found 761.0846; Anal calcd for C.sub.44H.sub.36P.sub.2Fe.sub.2: C, 71.57; H, 4.91. found: C, 71.12; H, 5.06.

(317) J.4. (R,R)-bis-2,2-(cyclohexylphenylphosphino)biphenyl 49d

(318) The same procedure as described for 49a was used starting from (R)-(2-bromophenyl)-cyclohexyl-phenylphosphine (II-o). The product was purified by column chromatography on silica gel with a mixture hexane/CH.sub.2Cl.sub.2 as eluent.

(319) .sup.31P NMR (CDCl.sub.3): 6=17.1

(320) J.5. (S,S)-bis-2,2-(phenyl-o-tolylphosphino)biphenyl 49e

(321) The same procedure as described for 49a was used starting from (S)-(2-bromophenyl)-phenyl-(o-tolyl)phosphine (II-o). The product was purified by column chromatography on silica gel with a mixture Hexane/EtOAc 50:1 as eluent.

(322) .sup.31P NMR (CDCl.sub.3): 6=18.7 and 23.0

(323) K. Catalysis of Asymmetric Hydrogenation by Chiral Rhodium Complexes

(324) Chiral diphosphines (1-48) and (I-49c) were tested in catalyzed asymmetric hydrogenation reactions as rhodium complexes. Substrates used are methyl -aceamidocinnamate 63, dimethyl itaconate 65, precursor 67 of Levetiracetam 69 and dehydroesters 70 and 72:

(325) ##STR00041##
K.1. Preparation of rhodium complexes with 1,2-diphosphino benzene ligands (I-48)
General procedure

(326) To a solution of [Rh(COD).sub.2]BF.sub.4 (0.09 mmol) in methylene chloride (2.5 mL) was added dropwise under argon a solution of diphosphine (0.1 mmol) in methylene chloride (3.5 mL). The resulting solution was stirred at this temperature during one hour and then diethyl ether (10 mL) was added. The precipitate was filtered and washed with diethyl ether (35 mL) to afford the rhodium complexes.

(Cycloocta-1,5-diene)-(Sp)-[1-diphenylphosphino-2-(o-anisyl-phenylphosphino)-benzene 48a]rhodium tetrafuoroborate

(327) General procedure; Orange solid; Yield 80%; .sup.1H NMR (300 MHz, CDCl.sub.3) 2.35-2.45 (m, 8H, CH.sub.2), 3.66 (s, 3H, OCH.sub.3), 4.83-5.21 (m, 4H, CH), 6.99-7.00 (m, 2H, Harom), 7.12-7.14 (m, 1H, Harom), 7.45-7.60 (m, 20H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 49.9 (dd, J=27.6, 150.7 Hz), 57.0 (dd, J=27.6, 150.7 Hz); HRMS calcd for C.sub.39H.sub.38OP.sub.2Rh [M-BF.sub.4].sup.+ 687.1447. found 687.1436.

(Cycloocta-1,5-diene)-(Sp)-[1-dicyclohexylphosphino-2-(o-anisyl-phenylphosphino)-benzene 48b]rhodium tetrafitoroborate

(328) General procedure; Orange solid; Yield 63%; .sup.1H NMR (300 MHz, CDCl.sub.3) 0.85-1.40 (m, 12, Hcy), 1.66-1.76 (m, 6H, Hcy), 1.93-1.97 (m, 1H, Hcy), 2.17-2.51 (m, 11H, Hcy/CH.sub.2), 3.55 (s, 3H, OCH.sub.3), 4.66-4.73 (m, 2H, CH), 5.57 (sl, 1H, CH), 5.92 (sl, 1H, CH), 6.93-7.02 (m, 3H, Harom), 7.36-7.62 (m, 9H, Harom), 7.71-7.75 (m, 1H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 53.2 (dd, J=24.9, 150.6 Hz), 62.5 (dd, J=24.9, 145.4 Hz); HRMS calcd for C.sub.39H.sub.50OP.sub.2Rh [M-BF.sub.4].sup.+ 699.2386. found 699.2362.

(Cycloocta-1,5-diene)-(Sp)-[1-diisopropylphosphino-2-(o-anisyl-phenylphosphino)-benzene 48c]rhodium tetrafuoroborate

(329) General procedure; Orange solid; Yield 53%; 1H NMR (300 MHz, CDCl.sub.3) 0.89 (dd, J=7.0, 16.3 Hz, 3H, CH.sub.3), 1.18 (dd, J=7.2, 16.4 Hz, 3H, CH.sub.3), 1.25-1.29 (m, 6H, CH.sub.3), 2.29-2.46 (m, 6H, CH.sub.2/CH), 2.53-2.60 (m, 2H, CH.sub.2), 2.66-2.82 (m, 2H, CH.sub.2), 3.60 (s, 3H, OCH.sub.3), 4.75-4.79 (2sl, 2H, CH.sub.COD), 5.67 (sl, 1H, CH.sub.COD), 6.05 (sl, 1H, CH.sub.COD), 6.98-7.07 (m, 3H, Harom), 7.41-7.47 (m, 3H, Harom), 7.51-7.69 (m, 3H, Harom), 7.64-7.67 (m, 3H, Harom), 7.78-7.80 (m, 1H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 52.5 (dd, J=23.9, 152.3 Hz), 69.5 (dd, J=23.9, 146.3 Hz); HRMS calcd for C.sub.33H.sub.42OP.sub.2Rh [M-BF.sub.4]+ 619.1760. found 619.1758.

(Cycloocta-1,5-diene)-(Sp)-[1-di(p-tolyl)phosphino-2-(o-anisyl-phenylphosphino)-benzene 48e]rhodium tetrafuoroborate

(330) General procedure; Orange solid; Yield 54%; .sup.1H NMR (300 MHz, CDCl.sub.3) 2.31-2.43 (m, 8H, CH.sub.2), 2.42 (s, 3H, CH.sub.3), 2.44 (s, 3H, CH.sub.3), 3.66 (s, 3H, OCH.sub.3), 4.83-5.21 (m, 4H, CH), 6.97-7.02 (m, 2H, Harom), 7.12-7.15 (m, 1H, Harom), 7.25-7.26 (m, 2H, Harom), 7.31-7.35 (m, 4H, Harom), 7.42-7.54 (m, 5H, Harom), 7.55-7.61 (m, 7H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 49.8 (dd, J=26.7, 148.2 Hz), 56.2 (dd, J=26.7, 150.7 Hz); HRMS calcd for C.sub.41H.sub.42OP.sub.2Rh [M-BF.sub.4].sup.+ 715.1760. found 715.1733.

(Cycloocta-1,5-diene)-(Sp)-[1-di(p-trifluoromethylphenyl)phosphino-2-(o-anisyl-phenylphosphino)-benzene 48f]rhodium tetrafuoroborate

(331) General procedure; Yellow solid, Yield 66%; .sup.1H NMR (300 MHz, CDCl.sub.3) 2.38-2.50 (m, 8H, CH.sub.2), 3.70 (s, 3H, OCH.sub.3), 4.90-5.31 (m, 4H, CH), 6.96-6.98 (m, 2H, Harom), 7.12 (dd, J=5.1, 8.4 Hz, 1H, Harom), 7.47-7.63 (m, 12H, Harom), 7.69-7.72 (m, 4H, Harom), 7.81-7.82 (m, 2H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 49.7 (dd, J=29.2, 148.2 Hz), 56.0 (dd, J=29.2, 153.0 Hz); HRMS calcd for C.sub.41H.sub.36OF.sub.6P.sub.2Rh [M-BF.sub.4].sup.+ 823.1195. found 823.1192.

(Cycloocta-1,5-diene)-(Rp)-[1-diphenylphosphino-2-(ferrocenyl-phenylphosphino)-benzene 48 g]rhodium tetrafuoroborate

(332) General procedure; Dark orange solid; Yield 73%; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.91-2.00 (m, 2H, CH.sub.2), 2.23-2.25 (m, 2H, CH.sub.2), 2.51-2.64 (m, 4H, CH.sub.2), 3.61 (s, 5H, Cp), 4.42 (sl, 1H, Cp), 4.51 (sl, 1H, Cp), 4.62-4.65 (m, 4H, Cp/CH), 5.22-5.23 (m, 1H, CH), 5.61-5.62 (m, 1H, CH), 7.35-7.42 (m, 4H, Harom), 7.45-7.47 (m, 3H, Harom), 7.52-7.55 (m, 3H, Harom), 7.61-7.69 (m, 6H, Harom), 7.74-7.76 (m, 1H, Harom), 7.90-7.93 (m, 2H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 51.0 (dd, J=29.1, 148.2 Hz), 58.2 (dd, J=29.1, 153.0 Hz); HRMS calcd for C.sub.42H.sub.40FeP.sub.2Rh [M-BF.sub.4].sup.+ 765.1005. found 765.0987.

(Cycloocla-1,5-diene)-(Rp)-[1-diphenylphosphino-2-(isopropyl-phenylsphino)-benzene 48h]rhodium tetrafuoroborate

(333) General procedure; Orange solid; Yield 60%; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.22 (dd, J=7.0, 14.7 Hz, 3H, CH.sub.3), 1.28 (dd, J=7.0, 19.5 Hz, 3H, CH.sub.3), 2.13-2.16 (m, 2H, CH.sub.2), 2.32-2.58 (m, 6H, CH.sub.2), 3.29-3.33 (m, 1H, CH), 4.84-4.85 (m, 1H, CH), 4.92-4.93 (m, 1H, CH), 5.04-5.05 (m, 1H, CH), 5.69-5.70 (m, 1H, CH), 7.49-7.71 (m, 19H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 57.8 (dd, J=28.5, 154.9 Hz), 67.8 (dd, J=28.5, 148.6 Hz); HRMS calcd for C.sub.35H.sub.38P.sub.2Rh [M-BF.sub.4].sup.+ 623.1498. found 623.1500.

(Cycloocta-1,5-diene)-(1S,2S)-[1,2-(o-anisyl-phenylphosphino)-benzene 48j]rhodium tetrafuioroborate

(334) To a suspension of [Rh(COD).sub.2]BF.sub.4 (0.055 mmol) in THF (1.2 mL) was added dropwise under argon a solution of diphosphine 48j (0.059 mmol) in THF (1.7 mL). The resulting solution was stirred at this temperature during one hour and the solvent was evaporated to about 1 mL. Diethyl ether (5 mL) was added and the resulting precipitate was filtered then washed with diethyl ether (35 mL) to afford the corresponding rhodium complex.

(335) Orange solid; Yield 64%; .sup.1H NMR (300 MHz, CDCl.sub.3) 2.33-2.51 (m, 8H, CH.sub.2), 3.60 (s, 6H, OCH.sub.3), 5.07 (sl, 4H, CH), 6.89-6.93 (m, 4H, Harom), 7.09-7.11 (m, 2H, Harom), 7.42-7.58 (m, 12H, Harom), 7.67-7.70 (m, 4H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 50.7 (d, J=149.8 Hz); HRMS calcd for C.sub.40H.sub.40O.sub.2P.sub.2Rh [M-BF.sub.4].sup.+ 717.1553. found 717.1522.

(Cycloocta-1,5-diene)-(1S,2R)-[2-(isopropyl-phenylphosphino)-1-(o-anisyl-phenyl phosphino)-benzene 48k]rhodium tetrafuoroborate

(336) To a suspension of [Rh(COD).sub.2]BF.sub.4 (0.055 mmol) in THF (1.2 mL) was added dropwise under argon a solution of diphosphine 48k (0.059 mmol) in THF (1.7 mL). The resulting solution was stirred at this temperature during one hour and the solvent was evaporated to about 1 mL. Diethyl ether (5 mL) was added and the resulting precipitate was filtered then washed with diethyl ether (35 mL) to afford the corresponding rhodium complex.

(337) Orange solid; Yield 70%; .sup.1H NMR (300 MHz, CDCl.sub.3) 1.07 (dd, J=6.8, 15.0 Hz, 3H, CH.sub.3), 1.17 (dd, J=6.8, 19.1 Hz, 3H, CH.sub.3), 2.05-2.17 (m, 2H, CH.sub.2), 2.28-2.30 (m, 2H, CH.sub.2), 2.45-2.47 (m, 2H, CH.sub.2), 2.56-2.58 (m, 2H, CH.sub.2), 3.10-3.14 (m, 1H, CH), 3.60 (s, 3H, OCH.sub.3), 4.70 (sl, 2H, CH), 5.00 (sl, 1H, CH), 5.70 (sl, 1H, CH), 7.04-7.13 (m, 3H, Harom), 7.52-7.61 (m, 13H, Harom), 7.76-7.79 (m, 2H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 50.4 (dd, J=26.9, 150.1 Hz), 64.0 (dd, J=26.9, 146.3 Hz); HRMS calcd for C.sub.36H.sub.40OP.sub.2Rh [M-BF.sub.4].sup.+ 653.1604. found 653.1591.

(338) K.2. Preparation of rhodium complexes with diphosphine ligand (I-49c)

(Cycloocta-1,5-diene)-[(S,S)-2,2-bis(ferrocenyl-phenylphosphino)-1,1-biphenyl 49c]rhodium tetrafuoroborate

(339) To a solution of [Rh(COD).sub.2]BF.sub.4 (0.036 g, 0.09 mmol) in methylene chloride (2.5 mL) was added dropwise under argon a solution of diphosphine 49c (0.074 g, 0.1 mmol) in methylene chloride (3.5 mL). The resulting solution was stirred at this temperature during one hour and then diethyl ether (10 mL) was added. The precipitate was filtered and washed with diethyl ether (35 mL) to afford the rhodium complex 5 as an orange powder.

(340) Yield 65%; .sup.1H NMR (300 MHz, CDCl.sub.3) 2.00-2.02 (m, 2H, CH.sub.2), 2.17-2.22 (m, 2H, CH.sub.2), 2.47-2.51 (m, 2H, CH.sub.2), 2.59-2.64 (m, 2H, CH.sub.2), 3.08 (sl, 2H, Hfer), 4.09 (sl, 10H, Hfer), 4.30 (br.s, 2H, Hfer), 4.64-4.72 (m, 8H, Hfer/CH), 6.63 (d, J=7.1 Hz, 2H, Harom), 7.11 (t, J=7.5 Hz, 2H, Harom), 7.25-7.27 (m, 10H, Harom), 7.37 (t, J=7.3 Hz, Harom), 8.18 (br.s, 2H, Harom); .sup.31P NMR (121 MHz, CDCl.sub.3) 21.0 (d, J=145.6 Hz); HRMS calcd for C.sub.52H.sub.48Fe.sub.2P.sub.2Rh [M-BF.sub.4].sup.+ 949.0982. found 949.0999.

(341) K.3. Asymmetric Catalyzed Hydrogenation

(342) Typical procedure

(343) A solution of [Rh(COD)L*]BF.sub.4 (0.005 mmol, 1 mol %) and substrate (0.5 mmol) in dry solvent (7.5 mL) was introduced in a stainless steel autoclave. The autoclave was closed, purged with hydrogen and then pressurized with hydrogen. After 16 h of stirring at room temperature, the pressure was released to atmospheric pressure and the solution was transferred to a round bottom flask. The solvent was removed on a rotary evaporator to give a residue which was purified by column chromatography on silica gel to afford the hydrogenated product. The enantiomeric excess was determined by HPLC on chiral column.

(344) Results of aymmetric catalyzed hydrogenations by rhodium complexes of ligands (I-48) or (I-49) are presented in table 9 and 10.

(345) TABLE-US-00009 TABLE 9 Asymmetric catalyzed hydrogenation by rhodium complexes of ligands (I-48) Cond. (RT/16 h) Product Diphosphine 48 P Conv ee Substrate R.sup.1 R.sup.2 R.sup.7 R.sup.8 Solvant (H.sub.2) (%) (%) 63 48a Ph o-An Ph Ph MeOH 4 64 93 61 (R) 10 100 63 (R) 20 100 60 (R) THF 10 6 nd CH.sub.2Cl.sub.2 7 nd EtOH 100 55 (R) i-PrOH 81 38 (R) Toluene 2 nd 48b o-An cHex cHex MeOH 10 100 32 (R) THF 100 20 (R) CH.sub.2Cl.sub.2 23 nd 48c o-An i-Pr i-Pr MeOH 100 42 (R) 48e o-An p-Tol p-Tol MeOH 10 100 49 (R) 48f o-An p-CF.sub.3Ph p-CF.sub.3Ph MeOH 10 100 45 (R) 48g Fc Ph Ph MeOH 10 100 6 (R) 48h i-Pr Ph Ph MeOH 10 100 58 (S) 48i Ph o-Tol Ph MeOH 10 100 54 (R) 48j o-An o-An Ph MeOH 10 100 19 (R) 48k i-Pr o-An Ph MeOH 10 100 22 (S) 65 48a o-An Ph Ph MeOH 10 66 100 32 (R) THF 100 0 CH.sub.2Cl.sub.2 100 2 (R) 48b o-An cHex cHex MeOH 10 100 45 (R) THF 100 57 (R) CH.sub.2Cl.sub.2 100 57 (R) 48c o-An i-Pr i-Pr MeOH 100 12 (R) CH.sub.2Cl.sub.2 100 48 (R) 48e o-An p-Tol p-Tol MeOH 100 0 CH.sub.2Cl.sub.2 100 2 (R) 48f o-An p-CF.sub.3Ph p-CF.sub.3Ph MeOH 10 100 3 (R) CH.sub.2Cl.sub.2 100 0 48g Fc Ph Ph CH.sub.2Cl.sub.2 10 100 56 (R) 48h i-Pr Ph Ph CH.sub.2Cl.sub.2 10 100 44 (R) 48i Ph o-Tol Ph CH.sub.2Cl.sub.2 10 100 0 48j o-An o-An Ph CH.sub.2Cl.sub.2 10 100 46 (R) 48k i-Pr o-An Ph MeOH 10 100 57 (R) 48k i-Pr o-An Ph CH.sub.2Cl.sub.2 10 100 76 (R)

(346) TABLE-US-00010 TABLE 10 Asymmetric catalyzed hydrogenation by rhodium complex of ligand (I-49c) Product Conditions (RT C./16 h) Conv Substrate Solvent P(H.sub.2) (%) ee (%) MeOH THF CH.sub.2Cl.sub.2 PC toluene 4 10 4 64 100 100 100 100 100 100 85 (R) 80 (R) 68 (R) 70 (R) 66 (R) 46 (R) MeOH THF CH.sub.2Cl.sub.2 4 66 100 100 100 32 (S) 72 (S) 96 (S) MeOH THF CH.sub.2Cl.sub.2 4 68 100 100 100 38 (R) 43 (R) 38 (R) MeOH THF CH.sub.2Cl.sub.2 4 71 100 100 100 90 (R) 16 (R) 40 (R) MeOH THF CH.sub.2Cl.sub.2 toluene 4 73 100 100 100 100 36 (S) 43 (S) 58 (S) 6 (S)

Methyl 2-acetamido-3-phenylpropionate 64

(347) The enantiomeric excess of 64 was determined by HPLC on Chiralcel OD-H hexane/2-propanol 95:5, 1 mL.Math.min.sup.1, t.sub.R (R) 21.4 min, t.sub.R (S) 34.7 min. H NMR (300 MHz, CDCl.sub.3) 1.97 (s, 3H, CH.sub.3), 3.06-3.08 (m, 2H, CH.sub.2Ph), 3.64 (s, 3H, CH.sub.3), 4.86-4.88 (m, 1H, CH), 6.11 (br s, 1H, NH), 7.19-7.22 (m, 5H, Harom).

Dimethyl 3-methylsuccinate 66

(348) The enantiomeric excess of 66 was determined by HPLC on Chiralcel OD-H hexane/2-propanol 95:5, 0.5 mL.Math.min.sup.1, t.sub.R (R) 13.0 min, t.sub.R (S) 21.8 min. .sup.1H NMR (300 MHz, CDCl.sub.3) 1.14 (d, J=7.1 Hz, 3H, CH.sub.3), 2.31 (dd, J=3.0, 16.5 Hz, 1H, CH.sub.2), 2.66 (dd, J=8.1, 16.5 Hz, 1H, CH.sub.2), 2.84-2.86 (m, 1H, CH), 3.60 (s, 3H, CH.sub.3), 3.62 (s, 3H, CH.sub.3).

(349) L. Catalysis of Asymmetric Allylation by Chiral Palladium Complexes

(350) Chiral diphosphines (I-48) were tested in catalyzed asymmetric allylation reactions of dimethyl malonate 74 in its derivative 76, in presence of chiral palladium complexes. Reactions were carried out at ambiant temperature and results obtained after 18 h of reaction are presented in Table 11.

(351) ##STR00047##

(352) TABLE-US-00011 TABLE 11 Asymmetric catalyzed allylation by palladium complexes and diphosphine (I-48). Conditions (RT C./18 h).sup.(a) Product 76 Diphosphine 48 (R.sup.1 = Ph) Conv Rdt e.e. R.sup.2 R.sup.9 R.sup.10 Base.sup.(b) Solvent (%) (%) (%) 48a o-An Ph Ph A THF 100 80 21 (S) B 100 86 19 (S) CH.sub.2Cl.sub.2 100 83 24 (S) Toluene 100 nd 14 (S) 48b cHex cHex A THF 100 nd 13 (S) B 100 85 13 (S) CH.sub.2Cl.sub.2 100 nd 45 (S) 48c i-Pr i-Pr A THF 100 nd 49 (S) B CH.sub.2Cl.sub.2 100 nd 56 (S) 48d o-Tol o-Tol A THF 100 84 58 (R) B CH.sub.2Cl.sub.2 n.d. 72.sup.a 52 (R) 48e p-Tol p-Tol A THF 100 nd 6 (R) B CH.sub.2Cl.sub.2 100 nd 30 (S) 48f p-CF.sub.3Ar p-CF.sub.3Ar A THF 100 nd 6 (S) B CH.sub.2Cl.sub.2 100 n.d 14 (S) 48j o-An o-An Ph B CH.sub.2Cl.sub.2 100.sup.a n.d. 53 (S) 48k i-Pr o-An Ph B CH.sub.2Cl.sub.2 100 n.d. 15 (S) .sup.(a)1% [Pd(C.sub.3H.sub.5)Cl].sub.2. .sup.(b)conditions A: NaH and B: BSA/KOAc

Typical Procedure for the Allylic Alkylation of 1,3-Diphenylpropenyl Acetate 75 with Dimethylmalonate 74

(353) In a Schlenk tube, ligand (12 mol, 1.2 mol %) and [Pd(.sup.3-C.sub.3H.sub.5)Cl].sub.2 (5 mol, 0.5 mol %) were dissolved in dichloromethane (2 mL) under argon atmosphere. The reaction mixture was stirred 1 h at room temperature and (E)-1,3-diphenylprop-2-en-1-yl acetate 75 (0.25 g, 1 mmol) in dichloromethane (1 mL) was transferred to this Schlenk tube. After 20 minutes, this solution was transferred into another reaction vessel containing N,O-bis(trimethylsilyl)acetamide (0.49 mL, 2 mmol), a catalytic amount of KOAc and dimethyl malonate 74 (0.23 mL, 2 mmol) in CH.sub.2Cl.sub.2 (4 mL). The reaction mixture was stirred at room temperature during 18 h. The reaction mixture was then diluted with diethyl ether and the organic layer was washed with a saturated aqueous NH.sub.4Cl solution (25 mL) and then dried over MgSO.sub.4. Evaporation under reduced pressure gave a residue which was purified by chromatography on silica gel with petroleum ether/ethyl acetate (10/1) as eluent affording the alkylated product.

Methyl 2-carboxymethoxy-3,5-diphenylpent-4-enoate 76

(354) The enantiomeric excess of 76 was determined by HPLC on Chiralpak AD hexane/2-propanol 90:10, 0.5 mL.Math.min.sup.1, t.sub.R (R) 15.8 min, t.sub.R (S) 22.7 min. H NMR (CDCl.sub.3) S (ppm), 3.56 (s, 3H, CH.sub.3), 3.75 (s, 3H, CH.sub.3), 4.02 (d, J=10.9 Hz, 1H, CH), 4.27 (dd, J=8.8, J=10.8 Hz, 1H, CH), 6.40 (dd, J=8.6, 15.7 Hz, 1H, CH), 6.54 (d, J=15.7 Hz, 1H, CH), 7.10-7.40 (10H, m, Harom).