Catalytic asymmetric Michael addition with curcumin derivative
作者:Wenjun Li、Wenbin Wu、Feng Yu、Huicai Huang、Xinmiao Liang、Jinxing Ye
DOI:10.1039/c0ob00757a
日期:——
Catalytic asymmetric Michael additions with curcumin derivatives were achieved by a new series of tertiary amine–thiourea organocatalysts to afford the Michael adducts in high yields and excellent enantioselectivities.
[EN] RUTHENIUM-DIAMINE COMPLEXES AND METHOD FOR PRODUCING OPTICALLY ACTIVE COMPOUNDS<br/>[FR] COMPLEXES RUTHÉNIUM-DIAMINE ET PROCÉDÉ DE PRODUCTION DE COMPOSÉS OPTIQUEMENT ACTIFS
申请人:TAKASAGO PERFUMERY CO LTD
公开号:WO2012026201A1
公开(公告)日:2012-03-01
Provided is a catalyst for asymmetric reduction, which can be produced by a convenient and safe production method, has a strong catalytic activity, and has excellent stereoselectivity. The present invention relates to a ruthenium complex represented by the following formula (1): wherein R1 represents an alkyl group or the like; Y represents a hydrogen atom; X represents a halogen atom or the like; j and k each represent 0 or 1; R2 and R3 each represent an alkyl group or the like; R11 to R19 each represent a hydrogen atom, an alkyl group or the like; Z represents oxygen or sulfur; n1 represents 1 or 2; and n2 represents an integer from 1 to 3, a method for producing the ruthenium complex, a catalyst for asymmetric reduction formed from the ruthenium complex, and methods for selectively producing an optically active alcohol and an optically active amine using the catalyst for asymmetric reduction.
Asymmetric Three-Component Reaction for the Synthesis of Tetrasubstituted Allenoates via Allenoate-Copper Intermediates
作者:Yu Tang、Jian Xu、Jian Yang、Lili Lin、Xiaoming Feng、Xiaohua Liu
DOI:10.1016/j.chempr.2018.04.012
日期:2018.7
three-component reaction of α-diazoesters with terminal alkynes and isatins was achieved. This one-pot synthesis gave rise to axially chiral tetrasubstituted allenoates bearing a stereogenic center. The chiral guanidinium salt/CuBr/YBr3 catalytic system proved efficient and highly diastereo- and enantioselective for a wide range of alkynes, aromatic α-diazoesters, and isatins under mild reaction conditions
[EN] PROCESS FOR THE PREPARATION OF AN OREXIN RECEPTOR ANTAGONIST<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN ANTAGONISTE DES RÉCEPTEURS DES OREXINES
申请人:MERCK SHARP & DOHME
公开号:WO2012148553A1
公开(公告)日:2012-11-01
The present invention is directed to processes for preparing a diazepane compound which is an antagonist of orexin receptors, and which is useful in the treatment or prevention of neurological and psychiatric disorders and diseases in which orexin receptors are involved. The present invention is further directed to crystalline forms of this diazepane compound and pharmaceutical compositions thereof.
METHOD FOR PRODUCING OPTICALLY ACTIVE COMPOUND, AND NOVEL METAL-DIAMINE COMPLEX
申请人:TAKASAGO INTERNATIONAL CORPORATION
公开号:US20160347678A1
公开(公告)日:2016-12-01
The present invention pertains to a method for producing an optically active compound which includes a step for reducing an imino group of an imine compound or a step for reducing an unsaturated bond of a heterocyclic compound, while in the presence of hydrogen gas as a hydrogen donor and one or more types of complexes selected from a group consisting of a complex represented by general formula (1), a complex represented by general formula (2), a complex represented by general formula (3), and a complex represented by general formula (4) (the general formulas (1)-(4) are as stipulated by claim
1
).