The invention relates to ylide-functionalized phosphane ligands, the production of same and use in transition metal compounds, as well as the use of same as catalysts in organic reactions.

A 4,4-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO) (8-hydroxyquinolato)(P.sup.iPr.sub.3).sub.2 moieties, its synthesis, and its use as a catalyst.

A 4,4-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO)(2-mercaptoquinolato)(P.sup.iPr.sub.3).sub.2 moieties, its synthesis, and its use as a catalyst.

A highly pure optically active proton pump inhibitor compound can be produced safely and inexpensively in a high yield and enantioselectivity by a method of producing an optically active sulfoxide of Formula 2 or a salt thereof, comprising oxidizing a sulfide of Formula 1 or a salt thereof with hydrogen peroxide using an iron salt in the presence of a chiral ligand of Formula 3; wherein A is CH or N; R.sup.1 is hydrogen atom, an alkyl optionally substituted by halogen(s), or an alkoxy optionally substituted by halogen(s); one to three R.sup.2 may exist, and each of R.sup.2 is independently an alkyl, a dialkylamino, or an alkoxy optionally substituted by halogen(s) or alkoxy(s); each of R.sup.3 is independently hydrogen atom, a halogen, cyano or the like; R.sup.4 is a tertiary alkyl; and * and ** represent respectively R configuration or S configuration.

##STR00001##

An oxidative homocoupling method of synthesizing certain 2,2-bithiophenes from thiophenes using oxygen as the terminal oxidant is disclosed. In non-limiting examples, the method uses oxygen along with a catalytic system that includes palladium, an assistive ligand, and a non-palladium metal additive to catalyze one of the following reactions:

##STR00001##

Associated catalytic systems and compositions are also disclosed.

Disclosed are processes and intermediates for the preparation of compound (X), which is currently being investigated for the treatment of prostate cancer. ##STR00001##

Catalyst systems including more than one metallocene catalysts and processes for using the same are provided to produce polyolefin polymers such as polyethylene polymers.

Disclosed in the present invention is a preparation method for a tetra-substituted allenoic acid compound based on a palladium catalytic system, that is, a highly optically active allenoic acid compound having axial chirality is directly constructed in one step by reacting tertiary propargyl alcohol, carbon monoxide and water in an organic solvent under the action of a palladium catalyst, a chiral bisphosphine ligand, an organophosphoric acid, and an organic additive, and the theoretical yield can reach 100%. The method of the present invention is simple to operate, the raw materials and reagents are readily available, the reaction conditions are mild, the substrate universality is wide, the functional group compatibility is good, the reaction has high enantioselectivity (77%?96% ee), and the reaction is well compatible with complex natural products or substrates of a drug molecular skeleton. The highly optically active allenoic acid compound obtained by the present invention can be used as an important intermediate for constructing a ?-butyrolactone compound containing a tetra-substituted chiral quaternary carbon center, tetra-substituted allenol, tetra-substituted allenal, tetra-substituted allenyl ketone, tetra-substituted allenami de and other compounds.

Disclosed are processes and intermediates for the preparation of compound (X), which is currently being investigated for the treatment of prostate cancer.

##STR00001##

A hydrosilylation iron catalyst prepared from a two-electron ligand (L) and a mononuclear, binuclear, or trinuclear complex of iron indicated by formula (1), Fe having bonds with carbon atoms included in X and the total number of Fe-carbon bonds being 2-10. As a result of using iron, the hydrosilylation iron catalyst is advantageous from a cost perspective as well as being easily synthesized. Hydrosilylation reactions can be promoted under mild conditions by using this catalyst.
Fe(X).sub.a(1)
(in the formula, each X independently indicates a C2-30 ligand that may include an unsaturated group excluding carbonyl groups (CO groups) and cyclopentadienyl groups, however at least one X includes an unsaturated group, a indicates an integer of 2-4 per Fe atom.)