The salen Co(III)-catalyzed phenolic kinetic resolution of racemic anti- or syn-azido and benzyloxy epoxides provides a practical route to a range of enantioenriched anti- or syn-1-aryloxy-3-azido or benzyloxy-2-alcohols in excellent yields and ees. The synthetic potential of this protocol is illustrated with an enantioselective synthesis of ICI-118,551, a β-blocker, in a highly optically pure form (99% ee).
salen Co(III)催化的外消旋体反式或顺式
叠氮和苄氧基
环氧化物的
酚类动力学分离,提供了一种实用的方法,以优良的产率和对映体过剩(ee)的范围合成一系列富含对映体的反式或顺式1-芳氧基-3-
叠氮或苄氧基-2-醇。该协议的合成潜力通过高光学纯度(99% ee)的β-阻滞剂ICI-118,551的对映选择性合成得以说明。