A Highly Stereoselective Synthesis of Glycidic Amides Based on a New Class of Chiral Sulfonium Salts: Applications in Asymmetric Synthesis
作者:Francisco Sarabia、Carlos Vivar-García、Miguel García-Castro、Cristina García-Ruiz、Francisca Martín-Gálvez、Antonio Sánchez-Ruiz、Samy Chammaa
DOI:10.1002/chem.201201332
日期:2012.11.19
A new type of chiral sulfonium salts that are characterized by a bicyclic system has been designed and synthesized from α‐amino acids. Their corresponding ylides, which were prepared by basic treatment of the sulfonium salts, reacted smoothly with a broad array of simple and chiral aldehydes to provide trans‐epoxy amides in reasonable to very good yields and excellent stereoselectivities (>98 %). The
由α-氨基酸设计并合成了一种新型的具有双环体系特征的手性sulf盐。通过对treatment盐进行碱性处理而制备的它们相应的酰基化物,可与各种简单的手性醛平稳地反应,以合理至非常高的收率和出色的立体选择性(> 98%)提供反式环氧酰胺。发现获得的环氧酰胺可用作合成构件。因此,它们被还原成相应的环氧醇,并与不同类型的亲核试剂进行环氧乙烷开环反应。