Reactions of 1,2-dehydropyrrolidin-5-one with 1,3-dienes. Synthesis of <i>dl</i>-gephyrotoxin 223AB
作者:Oliver E. Edwards、Austin M. Greaves、Wing-Wah Sy
DOI:10.1139/v88-191
日期:1988.5.1
Evidence is presented that the regiospecific and often stereospecific pseudo-Diels–Alder reactions of 1,3-dienes with N-acyl immonium salts, derived from 5-ethoxy-2-pyrrolidinone, are stepwise reactions. 6,7-Dehydroindolizidinones, unsaturated lactam esters, and new indene and furan derivatives are described. A synthesis of dl-gephyrotoxin 223AB (indolizidine 223AB) from trans-1,3-heptadiene was achieved
有证据表明,1,3-二烯与衍生自 5-乙氧基-2-吡咯烷酮的 N-酰基亚铵盐的区域特异性和通常立体特异性的假狄尔斯-阿尔德反应是逐步反应。描述了 6,7-脱氢 indolizidinones、不饱和内酰胺酯和新的茚和呋喃衍生物。实现了从反式-1,3-庚二烯合成 dl-gephyrotoxin 223AB(吲哚里西啶 223AB)。