Radical cation salt induced tandem cyclization between anilines and N-vinyl amides: synthesis of 2-methyl-4-anilino-1,2,3,4-tetrahydroquinoline derivatives
作者:Xiao-dong Jia、Yan Ren、Cong-de Huo、Wen-Juan Wang、Xiang-Ning Chen、Xiao-Lan Xu、Xi-cun Wang
DOI:10.1016/j.tetlet.2010.10.106
日期:2010.12
A tandem cyclization of imines with N-vinyllactams induced by TBPA+ was investigated, and a series of 2-methyl-4-anilino-1,2,3,4-tetrahydroquinolines were synthesized based on a domino process in which N-vinyllactams serve as an acetaldehyde surrogate. A single electron transfer mechanism was proposed and radical cation salt acts as both a Lewis acid and one electron oxidant to induce such transformation
研究了由TBPA +诱导的亚胺与N-乙烯基内酰胺的串联环化反应,并基于其中N-乙烯基内酰胺起作用的多米诺过程,合成了一系列2-甲基-4-苯胺基-1,2,3,4-四氢喹啉作为乙醛的替代物。提出了单一的电子转移机制,自由基阳离子盐既充当路易斯酸又充当一种电子氧化剂来诱导这种转变。