Asymmetric synthesis via aziridinium ions: exploring the stereospecificity of the ring opening of aziridinium ions and a formal synthesis of (−)-swainsonine
作者:Sally J. Oxenford、Stephen P. Moore、Giorgio Carbone、Graeme Barker、Peter O’Brien、Mark R. Shipton、John Gilday、Kevin R. Campos
DOI:10.1016/j.tetasy.2010.03.048
日期:2010.6
opening of aziridinium ions with MeNH2 as a route to chiral diamines has been explored. When the aziridinium ion contained a phenyl or para-methoxyphenyl substituent, stereospecific ring opening occurred. In contrast, switching the para-methoxy group to a para-N,N-dimethylamino group gave a racemic diamine product. Second, starting from N-Boc pyrrolidine, asymmetric lithiation-trapping-ring expansion (via
描述了在两个不同项目中使用叠氮鎓离子。首先,已经探索了以MeNH 2为手性二胺的途径的叠氮鎓离子开环的立体特异性。当叠氮鎓离子包含苯基或对-甲氧基苯基取代基时,发生立体有择的开环。与此相反,在切换对位-甲氧基组到第- Ñ,Ñ二甲氨基基团,得到一个外消旋二胺产物。第二,从N -Boc吡咯烷开始,使用不对称的锂捕获-环扩环(通过叠氮鎓离子)来合成哌啶醇。这样,(-)的形式综合-swainsonine已完成。