N-Heterocyclic Carbene-Catalyzed Domino Ring-Opening/Redox Amidation/Cyclization Reactions of Formylcyclopropane 1,1-Diesters: Direct Construction of a 6−5−6 Tricyclic Hydropyrido[1,2-<i>a</i>]indole Skeleton
作者:Ding Du、Linxia Li、Zhongwen Wang
DOI:10.1021/jo900650h
日期:2009.6.5
Catalyzed by N-heterocycliccarbenes (NHCs), domino ring-opening/redox amidation/cyclization reactions of the readily available formylcyclopropane1,1-diesters with 2-chloro-1H-indole-3-carboaldehydes were reported. This methodology provides an efficient and direct construction of a 6−5−6 tricyclic hydropyrido[1,2-a]indole skeleton, which can be potentially applied for the synthesis of several types
据报道,在N-杂环卡宾(NHC)的催化下,易得的甲酰基环丙烷1,1-二酯与2-氯-1 H-吲哚-3-碳醛的多米诺开环/氧化还原酰胺化/环化反应得到了报道。该方法学提供了一种有效的直接构建6-5-6三环氢吡啶并[1,2- a ]吲哚骨架的方法,可潜在地用于合成几种类型的多环吲哚生物碱。