摘要:
Allylic alkylation with retention of configuration of a substrate having an allylic carbon-oxygen bond by reaction with a nucleophile in the presence of a Pd.degree. with an excess of a phosphine.
摘要:
A process is disclosed that quantitatively bioconverts indene to (1S,2R)-indene oxide and (1S,2R)-indandiol, by the action of fungal haloperoxidase followed by various chemical step(s), e.g., adjusting the pH.
摘要:
A regeneratable polymer-supported Pd(O) catalytic deblocking process using a regeneratable polymer-supported Pd(O) catalyst in a biphasic system deblocks various allyl-protected ester, carbonates, carbamates and cinnamyl esters.
摘要:
A novel hydrogenation process, employing an iridium or rhodium catalyst, in an alcoholic solvent mixture, for the reduction of the 4a,5 double bond in the polyhydronaphthyl ring of des-(.alpha.-methylbutyryl)-8-hydroxy-lovastatin or analogs thereof, is disclosed.
摘要:
A process for alkylating the alpha position of the 8-acyl side chain in mevinolin and analogs thereof is disclosed. The process proceeds with a single charge of base and alkyl halide to give products with a pharmaceutically acceptable purity.
摘要:
A stereoselective process for the preparation of antihypercholesterolemic agents of the HMG-CoA reductase inhibitor type comprises treatment of an intermediate .beta.-hydroxyketone with a trialkylborane and sodium borohydride at low temperatures.
摘要:
A novel process for the preparation of intermediates in the totally synthetic antihypercholesterolemic agents, 6-[2-[1,1'-biphenyl]-2-yl-ethenyl] pyranones, involving a highly efficient nickel catalyzed aryl cross-coupling reaction is disclosed.
摘要:
.beta.- or .gamma.-Ketoesters and .beta.- or .gamma.-ketoamides are asymmetrically reduced with a Ru(II)-BINAP derived catalyst at about 40.degree. C. and about 50N/mm.sup.2 of hydrogen in the presence of a strong acid.
摘要翻译:在强酸存在下,在约40℃和约50N / mm 2的氢气下,使用Ru(II)-BINAP衍生的催化剂不对称地还原β-或γ-酮酯和β-或γ-酮酰胺。
摘要:
The present invention is directed to a process of making spirocycles of general structural formula: ##STR1## where R.sub.1 is selected from the group consisting of CO--C.sub.1-3 alkyl, cyano, carboxy, carboxy C.sub.1-6 alkyl ester, carboxamide, C.sub.1-6 alkyl sulfinyl, C.sub.1-6 alkyl sulfonyl, C.sub.1-6 methanesulfonamide and halogen; R.sub.2 is selected from the group consisting of keto or alcohol, R.sub.3 is cyano, resulting in compounds which are Class III antiarrhythmic.
摘要翻译:本发明涉及制备通式结构式的螺环的方法:除了CO-C 1-3烷基,氰基,羧基,羧基C 1-6烷基酯,甲酰胺,C 1-6烷基亚磺酰基,C 1-6烷基磺酰基, C 1-6甲磺酰胺和卤素; R2选自酮或醇,R3为氰基,得到III类抗心律失常药物。
摘要:
A novel hydrogenation process using a homogenous rhodium catalyst for selectively reducing the 3,4 double bond in the polyhydronaphthyl ring of lovastatin, simvastatin or C-8-acyl or C-6-substituted analogs thereof is disclosed.