An efficient route to the pyrrolizidine ring system via an N-acyl anion cyclisation process
作者:Anthony Murray、George R. Proctor、P.John Murray
DOI:10.1016/0040-4020(96)00049-x
日期:1996.3
An enantioselective route to the pyrrolizidine ring system has been developed which uses an N-acyl anion cyclisation reaction as the key step. This methodology has provided the natural pyrrolizidines (−)-(1R, 8S)-1-hydroxy-pyrrolizidine 7, (−)-pyrrolizidin-1-ene-3-one 9 and (±)-trachelanthamidine 14. Extension of the process to an N-propionyl substrate provides ready access to a series of 2-methyl
已经开发了使用N-酰基阴离子环化反应作为关键步骤的对吡咯烷环系统的对映选择性途径。该方法学提供了天然吡咯烷核苷(-)-(1R,8S)-1-羟基-吡咯烷核苷7,(-)-吡咯并恶唑-1-烯-3-酮9和(±)-正邻苯二甲酰胺14。将该方法扩展至N-丙酰基底物使得可以容易地获得一系列2-甲基吡咯嗪核苷。