The Hg(OTf)2-catalyzed cyclization of N-tosylanilinoallylic alcohols giving rise to vinyl-substituted indolines has been developed. The reaction takes place with a highly efficient catalytic turnover (up to 1000 times) under mild conditions. The hydroxyl group of the organomercuric intermediate is protonated by in situ formed TfOH generating an oxonium cation, which regenerates the catalyst after demercuration.
我们开发了 Hg(OTf)2 催化 N-对
甲苯磺酰基
苯胺醇环化生成
乙烯基取代
吲哚啉的方法。该反应在温和的条件下以高效的催化周转率(高达 1000 倍)进行。有机巯基中间体的羟基被原位形成的 TfOH 质子化,生成羰基阳离子,在脱胶后再生催化剂。