The disclosure relates to an entecavir intermediate, a synthetic method therefor, and the synthetic method for entecavir by using the intermediate. According to the disclosure, the synthetic methods for entecavir and the intermediate thereof have the advantages of being controllable in chirality, high in yield and product purity, wide in source of raw materials, cheap and available in reagents, simple in reactions, convenient to operate, environmentally friendly, and suitable for industrial amplification production.

Control or repellency of bed bugs is accomplished by bringing the bed bugs into contact with at least one of the compounds of the structure (I); wherein R is selected from OH, OC(O)R.sub.4, OR.sub.6, (OR.sub.6).sub.2, wherein each R.sub.6 is independently selected from an alkyl group containing from 1 to 4 carbon atoms and R.sub.4 is a branched or straight chain saturated or unsaturated hydrocarbyl group with zero to two double bonds and from 1 to 15 carbon atoms; X is O or CH.sub.2, with the proviso that when X is O R can only be =0; each Z is independently selected from (CH) and (CH.sub.2) y is a numeral selected from 1 and 2; R.sub.1 is selected from H or a branched or straight chain saturated or unsaturated hydrocarbyl group with zero to two double bonds and from 1 to 15 carbon atoms. R.sub.2 is selected from H and a branched or straight chain saturated or unsaturated hydrocarbyl group with zero to three double bonds and from 1 to 15 carbon atoms. R.sub.3 is selected from H, a branched or straight chain, saturated or unsaturated hydrocarbyl group with zero to three double bonds and from 1 to 15 carbon atoms, (CH.sub.2).sub.nOH, C(O)OR.sub.5, CH.sub.2C(O)OR.sub.7, CH.sub.2C(O)R.sub.8, C(O)NR.sub.9R.sub.10, CH.sub.2C(O)NR.sub.11R.sub.12 where each of R.sub.5, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11 and R.sub.12 is independently selected from H and a branched or straight chain, saturated or unsaturated hydrocarbyl group with zero to three double bonds and from 1 to 15 carbon atoms, and n is an integer of from 1 to 12; and the bond between the 2 and 3 positions in the ring structure may be a single or a double bond, and wherein the compounds of structure (1) contain from 11 to 20 total carbon atoms, except where R is O, XCH.sub.2 and y is 1 the compounds of structure (I) contain from 13 to 20 total carbon atoms in the compounds, wherein the compounds of structure (1) contain from 11 to 20 total carbon atoms, except where R is O, XCH2 and y is 1 the compounds of structure (I) contain from 13 to 20 total carbon atoms in the compounds, wherein the compounds of structure (1) contain from 11 to 20 total carbon atoms, except where R is =0, XCH.sub.2 and y is 1 the compounds of structure (I) contain from 13 to 20 total carbon atoms in the compounds. ##STR00001##

Control or repellency of bed bugs is accomplished by bringing the bed bugs into contact with at least one of the compounds of the structure (I); wherein R is selected from OH, OC(O)R.sub.4, OR.sub.6, (OR.sub.6).sub.2, wherein each R.sub.6 is independently selected from an alkyl group containing from 1 to 4 carbon atoms and R.sub.4 is a branched or straight chain saturated or unsaturated hydrocarbyl group with zero to two double bonds and from 1 to 15 carbon atoms; X is O or CH.sub.2, with the proviso that when X is O R can only be =0; each Z is independently selected from (CH) and (CH.sub.2) y is a numeral selected from 1 and 2; R.sub.1 is selected from H or a branched or straight chain saturated or unsaturated hydrocarbyl group with zero to two double bonds and from 1 to 15 carbon atoms. R.sub.2 is selected from H and a branched or straight chain saturated or unsaturated hydrocarbyl group with zero to three double bonds and from 1 to 15 carbon atoms. R.sub.3 is selected from H, a branched or straight chain, saturated or unsaturated hydrocarbyl group with zero to three double bonds and from 1 to 15 carbon atoms, (CH.sub.2).sub.nOH, C(O)OR.sub.5, CH.sub.2C(O)OR.sub.7, CH.sub.2C(O)R.sub.8, C(O)NR.sub.9R.sub.10, CH.sub.2C(O)NR.sub.11R.sub.12 where each of R.sub.5, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11 and R.sub.12 is independently selected from H and a branched or straight chain, saturated or unsaturated hydrocarbyl group with zero to three double bonds and from 1 to 15 carbon atoms, and n is an integer of from 1 to 12; and the bond between the 2 and 3 positions in the ring structure may be a single or a double bond, and wherein the compounds of structure (1) contain from 11 to 20 total carbon atoms, except where R is O, XCH.sub.2 and y is 1 the compounds of structure (I) contain from 13 to 20 total carbon atoms in the compounds, wherein the compounds of structure (1) contain from 11 to 20 total carbon atoms, except where R is O, XCH2 and y is 1 the compounds of structure (I) contain from 13 to 20 total carbon atoms in the compounds, wherein the compounds of structure (1) contain from 11 to 20 total carbon atoms, except where R is =0, XCH.sub.2 and y is 1 the compounds of structure (I) contain from 13 to 20 total carbon atoms in the compounds. ##STR00001##

Highly active, recoverable and recyclable transition metal-based metathesis catalysts and their organometallic complexes including dendrimeric complexes are disclosed, including a Ru complex bearing a 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene and styrenyl ether ligand. The heterocyclic ligand significantly enhances the catalytic activity, and the styrenyl ether allows for the easy recovery of the Ru complex. Derivatized catalysts capable of being immobilized on substrate surfaces are also disclosed. The present catalysts can be used to catalyze ring-closing metathesis (RCM), ring-opening (ROM) and cross metatheses (CM) reactions, and promote the efficient formation of various trisubstituted olefins at ambient temperature in high yield.

Highly active, recoverable and recyclable transition metal-based metathesis catalysts and their organometallic complexes including dendrimeric complexes are disclosed, including a Ru complex bearing a 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene and styrenyl ether ligand. The heterocyclic ligand significantly enhances the catalytic activity, and the styrenyl ether allows for the easy recovery of the Ru complex. Derivatized catalysts capable of being immobilized on substrate surfaces are also disclosed. The present catalysts can be used to catalyze ring-closing metathesis (RCM), ring-opening (ROM) and cross metatheses (CM) reactions, and promote the efficient formation of various trisubstituted olefins at ambient temperature in high yield.

The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Fe complexes with tridentate ligands, having one amino or imino coordinating group and two phosphino coordinating groups, in hydrogenation processes for the reduction of ketones or aldehydes, into the corresponding alcohol or diol, respectively.

The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Fe complexes with tridentate ligands, having one amino or imino coordinating group and two phosphino coordinating groups, in hydrogenation processes for the reduction of ketones or aldehydes, into the corresponding alcohol or diol, respectively.

The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Fe complexes with tridentate ligands, having one amino or imino coordinating group and two phosphino coordinating groups, in hydrogenation processes for the reduction of ketones or aldehydes, into the corresponding alcohol or diol, respectively.

The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Fe complexes with tridentate ligands, having one amino or imino coordinating group and two phosphino coordinating groups, in hydrogenation processes for the reduction of ketones or aldehydes, into the corresponding alcohol or diol, respectively.

Control or repellency of bed bugs is accomplished by bringing the bed bugs into contact with at least one of the compounds of the structure (I)

##STR00001##

Wherein
R is selected from OH, OC(O)R.sub.4, OR.sub.6, (OR.sub.6).sub.2, wherein each R.sub.6 is independently selected from an alkyl group containing from 1 to 4 carbon atoms and R.sub.4 is a branched or straight chain saturated or unsaturated hydrocarbyl group with zero to two double bonds and from 1 to 15 carbon atoms;
X is O or CH.sub.2, with the proviso that when X is O, R can only be O;
each Z is independently selected from (CH) and (CH.sub.2)
y is a numeral selected from 1 and 2;
R.sub.1 is selected from H or a branched or straight chain saturated or unsaturated hydrocarbyl group with zero to two double bonds and from 1 to 15 carbon atoms.
R.sub.2 is selected from H and a branched or straight chain saturated or unsaturated hydrocarbyl group with zero to three double bonds and from 1 to 15 carbon atoms.
R.sub.3 is selected from H, a branched or straight chain, saturated or unsaturated hydrocarbyl group with zero to three double bonds and from 1 to 15 carbon atoms, (CH.sub.2).sub.nOH, C(O)OR.sub.5, CH.sub.2C(O)OR.sub.7, CH.sub.2C(O)R.sub.8, C(O)NR.sub.9R.sub.10, CH.sub.2C(O)NR.sub.11R.sub.12 where each of R.sub.5, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11 and R.sub.12 is independently selected from H and a branched or straight chain, saturated or unsaturated hydrocarbyl group with zero to three double bonds and from 1 to 15 carbon atoms, and n is an integer of from 1 to 12; and
the bond between the 2 and 3 positions in the ring structure may be a single or a double bond, and wherein the compounds of structure (1) contain from 11 to 20 total carbon atoms, except where R is O, XCH.sub.2 and y is 1 the compounds of structure (I) contain from 13 to 20 total carbon atoms in the compounds. wherein the compounds of structure (1) contain from 11 to 20 total carbon atoms, except where R is O, XCH.sub.2 and y is 1 the compounds of structure (I) contain from 13 to 20 total carbon atoms in the compounds. wherein the compounds of structure (1) contain from 11 to 20 total carbon atoms, except where R is O, XCH.sub.2 and y is 1 the compounds of structure (I) contain from 13 to 20 total carbon atoms in the compounds.