Diastereoselective Synthesis of Polyfunctional-Pyrrolidines via Vinyl Epoxide Aminolysis/Ring-Closing Metathesis: Synthesis of Chiral 2,5-Dihydropyrroles and (1R,2S,7R,7aR)-1,2,7-Trihydroxypyrrolizidine
作者:Karl B. Lindsay、Minyan Tang、Stephen G. Pyne
DOI:10.1055/s-2002-25337
日期:——
This paper describes an efficient and diastereoselective method for preparing 2-substituted-2,5-dihydropyrroles in racemic and optically active form via acid catalysed or microwave assisted aminolysis of vinyl epoxides with allyl amine followed by ring-closing metathesis. Using this method, (1R,2S,7R,7aR)-1,2,7-trihydroxypyrrolizidine could be prepared by elaboration of a chiral 2-substitited-2,5-dihydropyrrole.
本文介绍了一种高效的非对映选择性方法,通过酸催化或微波辅助氨解乙烯基环氧化物与烯丙基胺,然后进行闭环偏析,制备外消旋和光学活性形式的 2-取代-2,5-二氢吡咯。利用这种方法,可以通过制备手性 2-取代基-2,5-二氢吡咯来制备 (1R,2S,7R,7aR)-1,2,7-三羟基吡咯烷。