Catalytic asymmetric synthesis of β-hydroxy-α-amino acid esters by direct aldol reaction of glycinate Schiff bases

被引：45

作者：

Yoshikawa, N ^{[1
]}

Shibasaki, M ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Pharmaceut Sci, Bunkyo Ku, Tokyo 1130033, Japan

来源：

TETRAHEDRON | 2002年 / 58卷 / 41期

基金：

日本学术振兴会;

关键词：

direct aldol reaction; heterobimetallic asymmetric catalyst; glycinate Schiff base; beta-hydroxy-alpha-amino acid; lanthanide; vancomycin; benzophenone imine; glycine;

D O I：

10.1016/S0040-4020(02)00979-1

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A catalytic asymmetric synthesis of beta-hydroxy-alpha-amino acid esters was developed using the direct aldol reaction of glycinate Schiff bases with aldehydes. The reaction was catalyzed by heterobimetallic asymmetric complexes without preformation of enol silyl ethers from glycinate Schiff bases. anti-beta-Hydroxy-alpha-amino acid esters were obtained as the major diastereomer in most cases, and moderate enantiomeric excess (up to 76% ee) was achieved for the first time for this type of reaction. Various substrates were also examined to investigate the effects of the protective groups for the amine or for the carboxylic acid moiety in glycine. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：8289 / 8298

页数：10

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