New polymer-supported chiral phase-transfer catalysts in the asymmetric synthesis of α-amino acids:: the role of a spacer

被引：64
|
作者：
Thierry, B [1 ]
Plaquevent, JC [1 ]
Cahard, D [1 ]
机构：
[1] Univ Rouen, IRCOF, UPRESA 6014, F-76821 Mt St Aignan, France
来源：
TETRAHEDRON-ASYMMETRY | 2001年 / 12卷 / 07期
关键词：
D O I：
10.1016/S0957-4166(01)00187-2
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Polymer-supported cinchona alkaloid salts with different spacers were used as phase-transfer catalysts in the asymmetric C-alkylation of N-diphenyl methylene glycine tert-butyl ester. Various catalysts and alkylation conditions were studied, the best result being 81% e.e. with cinchoninium iodide bound to polqstyrene with a four-carbon spacer. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：983 / 986
页数：4
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