Asymmetric process for the preparation of diarylethylpiperazines derivatives and novel asymmetric diarylmethylamines as intermediates
申请人:——
公开号:US20040077861A1
公开(公告)日:2004-04-22
An asymmetric synthesis of diarylmethylpiperazines is described. The synthetic route enables preparation of a variety of enatiomerically pure amines with different N-alkyl groups. The invention includes an asymmetric addition of organometallic compounds to chiral sulfinimine to give adducts in predominantly one diastereomer can subsequently be transferred into pure enantiomers of by cleavage of the chiral auxilliary which is followed by synthesis of the piperazine ring by alkylation procedures.
本文介绍了一种二苯甲基哌嗪的不对称合成方法。该合成路线可以制备具有不同N-烷基的对映纯氨基化合物。该发明包括有机金属化合物不对称加成到手性亚磺酰胺中,形成主要一种对映异构体的加合物,随后通过手性辅助基的裂解转化为纯对映体,再通过烷基化方法合成哌嗪环。