Regioselective and Stereoselective Nucleophilic Ring Opening Reactions of A Phenyl-Substituted Aziridine: Enantioselective Synthesis of β-Substituted Tryptophan, Cysteine, and Serine Derivatives
作者:Chiyi Xiong、Wei Wang、Chaozhong Cai、Victor J. Hruby
DOI:10.1021/jo010860d
日期:2002.2.1
The asymmetric synthesis of beta-phenyl-substituted cysteine, tryptophan, and serine derivatives was successfully developed. In this approach, the key intermediate, enantiomerically pure 3-phenylaziridine-2-carboxylic ester 7, was prepared from alpha,beta-unsaturated ester 1 by employing the Sharpless asymmetric dihydroxylation. The aziridine 7 was treated with 4-methoxybenzylthiol, indole, and acetic
成功开发了β-苯基取代的半胱氨酸,色氨酸和丝氨酸衍生物的不对称合成物。在这种方法中,关键的中间体,对映体纯的3-苯基氮丙啶-2-羧酸酯7,是通过采用Sharpless不对称二羟基化反应由α,β-不饱和酯1制备的。用4-甲氧基苄硫醇,吲哚和乙酸处理氮丙啶7,分别在C3位置的清洁S(N)2型开环中分别生成β-苯基取代的半胱氨酸,色氨酸和丝氨酸。该通用方法可用于合成多种β-取代的新氨基酸。