A new indole synthesis via [3+3] annulation of 2-(benzotriazol-1-ylmethyl)-pyrroles with α,β-unsaturated aldehydes and ketones
作者:Alan R Katritzky、Julian R Levell、Jianqing Li
DOI:10.1016/0040-4039(96)01216-6
日期:1996.8
Poly-substituted indoles are readily accessible from substituted 2-(benzotriazol-1-ylmethyl)pyrrobles by lithiation, reaction with α,β-unsaturated aldehydes and ketones, and subsequent facile dehydrobenzotriazolylation-cyclodehydration. The substituted 2-(benzotriazol-1-ylmethyl)-pyrrole precursors are obtained by reacting α-bromoketones with terminally lithiated propargylbenzotriazole, and treating
可通过锂化,与α,β-不饱和醛和酮反应以及随后进行的容易的脱氢苯并三唑基化-环脱水作用,容易地从取代的2-(苯并三唑-1-基甲基)吡咯中获得多取代的吲哚。通过使α-溴代酮与末端锂化的炔丙基苯并三唑反应,并用伯胺处理所得的环氧化物,获得取代的2-(苯并三唑-1-基甲基)-吡咯前体。