N-Heterocyclic Carbene Catalyzed Domino Reactions of Formylcyclopropane 1,1-Diesters: Construction of a 6-5-5 Tricyclic Pyrrolo[1,2-a]indole
作者:Linxia Li、Ding Du、Jun Ren、Zhongwen Wang
DOI:10.1002/ejoc.201001364
日期:2011.1
Catalyzed by N-heterocyclic carbenes (NHCs), a domino ring-opening/redox amidation/Knoevenagel condensation of readily available formylcyclopropane 1,1-diesters with 1H-indole-2-carbaldehydes is reported. This methodology provides a new and direct method for the construction of a 6-55 tricyclic pyrrolo[1,2-a] indole skeleton.
据报道,在 N-杂环卡宾 (NHC) 的催化下,容易获得的甲酰基环丙烷 1,1-二酯与 1H-吲哚-2-甲醛发生多米诺开环/氧化还原酰胺化/Knoevenagel 缩合反应。该方法为构建6-55三环吡咯并[1,2-a]吲哚骨架提供了一种新的直接方法。