A General Asymmetric Synthesis of <i>syn</i>- and <i>anti</i>-β-Substituted Cysteine and Serine Derivatives
作者:Chiyi Xiong、Wei Wang、Victor J. Hruby
DOI:10.1021/jo011172x
日期:2002.5.1
syn-beta-substituted cysteine and serine derivatives. In this approach, the key intermediates, > 94% enantiomerically pure cyclic sulfates 3 and aziridines 7, were prepared from alpha,beta-unsaturated esters 1, employing the Sharpless asymmetric dihydroxylation. The high regio- and stereoselective ring-opening reactions of cyclic sulfates and aziridines provided enantiomerically pure beta-substituted cysteine and serine
已经开发出立体发散的合成途径以制备光学上纯的抗和顺-β-取代的半胱氨酸和丝氨酸衍生物。在这种方法中,关键的中间体,> 94%对映体纯的环状硫酸盐3和氮丙啶7,是使用Sharpless不对称二羟基化反应由α,β-不饱和酯1制备的。环状硫酸盐和氮丙啶的高区域和立体选择性开环反应提供了对映体纯的β-取代的半胱氨酸和丝氨酸衍生物。