Double Asymmetric Hydrogenation of Linear β,β-Disubstituted α,β-Unsaturated Ketones into γ-Substituted Secondary Alcohols using a Dual Catalytic System
β‐unsaturated ketones catalyzed by the DM‐SEGPHOS/DMAPEN/RuII complex with t‐C4H9OK afforded the γ‐substituted secondaryalcohols in high diastereo‐ and enantioselectivities. Some mechanistic experiments suggested that two different reactive species, type (I) and (II), were reversibly formed in this catalytic system: Type (I) with the diamine ligand DMAPEN enantioselectively hydrogenated the enones
Rhodium-Catalyzed Conjugated Addition of Aryllead Reagents to α,β-Unsaturated Carbonyl Compounds in Air and Water
作者:Rui Ding、Yong-Jun Chen、Dong Wang、Chao-Jun Li
DOI:10.1055/s-2001-16805
日期:——
In the presence of a rhodium catalyst, α,β-unsaturated esters and ketones (1a-f) react with phenyltrimethyllead 2 in aqueous media and under an air atmosphere to give the corresponding conjugated addition products (3a-e) in high yields.
PROCESS FOR THE CHIRAL RESOLUTION OF ACETATES TO (R)-ALCOHOLS EMPLOYING FUSARIUM PROLIFERATUM
申请人:Council of Scientific and Industrial Research
公开号:EP3063281A2
公开(公告)日:2016-09-07
[EN] A PROCESS OF CHIRAL RESOLUTION OF CYCLIC AND ACYCLIC ACETATES TO ENANTIOMERICALLY PURE (R)--ALCOHOLS<br/>[FR] PROCEDE DE RESOLUTION CHIRALE D'ACETATES CYCLIQUES ET ACYCLIQUES EN (R)-ALCOOLS DE PURETE ENANTIOMERIQUE
申请人:COUNCIL SCIENT IND RES
公开号:WO2015063796A2
公开(公告)日:2015-05-07
The patent discloses herein a process for the chiral resolution of racemic cyclic and acyclic acetates to obtain (R)-alcohol. Further, it discloses the resolution of racemic cyclic and acyclic acetates to obtain enantiomerically pure (R)-(-)-alcohol as single enantiomer through fungal catalyzed deacylation in single fermentation, wherein fungal strains are F. proliferatum.