A method is provided for preparing homochiral maleimide intermediates of the structure ##STR1## wherein R.sup.7, R.sup.8 and R.sup.9 are as defined herein by reacting a homochiral amine of the structure ##STR2## with maleic anhydride and a silylating agent. The maleimide intermediate is used in the enantio-selective preparation of thromboxane A.sub.2 receptor antagonists.
提供了一种制备同手性马来
酰亚胺中间体的方法,其结构为##STR1##,其中R.sup.7、R.sup.8和R.sup.9的定义如本文所述,通过将同手性胺##STR2##与
马来酐和
硅基化剂反应来实现。马来
酰亚胺中间体用于拟手性选择性制备血栓素A.sub.2受体拮抗剂。