Simple Gold-Catalyzed Synthesis of Benzofulvenes-<i>gem</i>-Diaurated Species as “Instant Dual-Activation” Precatalysts
作者:A. Stephen K. Hashmi、Ingo Braun、Pascal Nösel、Johannes Schädlich、Marcel Wieteck、Matthias Rudolph、Frank Rominger
DOI:10.1002/anie.201109183
日期:2012.4.27
Alkyl‐substituted diynes deliver benzofulvenes in a unique gold‐catalyzed reaction. The catalytic cycle involves the formation of gold acetylides by alkynyl C–H activation, the formation of vinylidene gold(I) intermediates by dual activation, and alkyl C–H activation by the vinylidene gold(I) species. gem‐Diaurated species obtained from the catalysis reactions prove to be highly active catalysts for
烷基取代的二炔在独特的金催化反应中提供苯并富烯。催化循环包括通过炔基C–H活化形成乙炔金,通过双重活化形成亚乙烯基Gold(I)中间体,以及通过亚乙烯基Gold(I)进行烷基C–H活化。从催化反应中获得的稀有宝石被证明是这些转化的高活性催化剂。