A facile method for the synthesis of enantiopure α-unsubstituted β-hydroxy esters
摘要:
One-pot deacylation-debromination reactions involving the transesterification of the initial chiral beta-bromo-beta-hydroxy thioimide aldol adducts and subsequent Al-Hg mediated reductive cleavage of the C-Br bond allow for a facile synthesis of enantiopure beta-hydroxy esters. (C) 2000 Published by Elsevier Science Ltd.
Catalytic asymmetric hydroboration of β,γ-unsaturated Weinreb amides: striking influence of the borane
作者:Sean M. Smith、Maulen Uteuliyev、James M. Takacs
DOI:10.1039/c1cc11746g
日期:——
Subtle differences in the structure of the borane strongly influence the catalytic efficiency and level of enantioselectivity in the catalytic asymmetric hydroboration of β,γ-unsaturated Weinreb amides.
Method for producing optically active 3-hydroxyhexanoic acids using
申请人:Chisso Corporation
公开号:US05643793A1
公开(公告)日:1997-07-01
A method for producing an optically active 3-hydroxy-hexanoic acid represented by formula (1) and the enantimer by asymmetrically hydrolyzing a racemic ester of 3-hydroxyhexanoic acid in the presence of a lipase derived from porcine pancreas. ##STR1##