A novel one-pot asymmetric synthetic method for the direct conversion of bromoacetates into highly substituted hydantoins has been developed. Both enantiomers of 1,3,5-trisubstituted hydantoins were conveniently synthesized through a dynamic kinetic resolution of bromoacetates derived from either ethyl l -lactate or diacetone- d -glucose. The sequential three-component reaction permitted the preparation
开发了一种将
溴乙酸盐直接转化为高度取代的乙内酰
脲的新型单锅不对称合成方法。1,3,5-三取代乙内酰
脲的两种对映异构体通过动态动力学拆分衍生自 l-
乳酸乙酯或双
丙酮-d-
葡萄糖的
溴乙酸盐方便地合成。连续三组分反应允许以 77-51% 的产率制备 (R)- 或 (S)-1,3,5- 三取代的乙内酰
脲,对映体比例高达 95:5。