esters with an oxygen nucleophile is described. Temperature controlled epimerization–substitution sequence provides a practical protocol for the preparation of highly enantioenriched α-hydroxy carboxylic acid derivatives up to 72% yield with 99:1 er.
描述了在α-
溴酸酯与氧亲核试剂的亲核取代反应中动态热力学拆分的一个实例。温度控制的差向异构化-取代序列为制备高度对映体富集的α-羟基
羧酸衍
生物提供了实用的方法,产率高达72%(99:1 er)。