[3+3] Cyclization reactions of β-nitroenamines and β-enaminonitriles with α,β-unsaturated carboxylic acid chlorides
作者:Mihály V. Pilipecz、Tamás R. Varga、Zoltán Mucsi、Pál Scheiber、Péter Nemes
DOI:10.1016/j.tet.2008.03.090
日期:2008.6
New indolizidines, quinolizidines, and octahydro-pyrido[1,2-a]azepines of lactam type were synthesized from 2-nitromethylene-pyrrolidine, -piperidine, and -hexahydroazepine, respectively, by [3+3] cyclizations with α,β-unsaturated carboxylic acid chlorides. In the case of quinolizidines, a double bond migration was observed, and explained in terms of amidity percentage. Cyanomethylene-pyrrolidine gave
通过[3 + 3]与α,β-的环化反应,分别由2-硝基亚甲基-吡咯烷,-哌啶和-六氢a庚啶合成了内酰胺型的新吲哚并咪唑,喹唑烷和八氢吡啶并[1,2- a ]氮杂ze。不饱和羧酸氯化物。在喹喔啉类的情况下,观察到双键迁移,并且用酰胺百分比来解释。当分别使用简单的开链酰基氯或肉桂酰氯时,氰基亚甲基-吡咯烷产生内酰胺类型的吲哚并咪唑,而1-氰基亚甲基-四氢异喹啉的转化产生内酰胺和酮。