Cu-Catalyzed Cascades to Carbocycles: Union of Diaryliodonium Salts with Alkenes or Alkynes Exploiting Remote Carbocations
作者:Fengzhi Zhang、Shoubhik Das、Andrew J. Walkinshaw、Alicia Casitas、Michael Taylor、Marcos G. Suero、Matthew J. Gaunt
DOI:10.1021/ja504361y
日期:2014.6.25
Copper-catalyzed cascade reactions between alkenes or alkynes and diaryliodonium salts form carbocyclic products in a single step. Arylation of the unsaturated functional group is proposed to form a carbocation intermediate that facilitates hydride shift pathways to translocate the positive charge to a remote position and enables ring formation via a Friedel-Crafts-type reaction.
烯烃或炔烃与二芳基碘鎓盐之间的铜催化级联反应一步形成碳环产物。不饱和官能团的芳基化被提议形成碳正离子中间体,促进氢化物转移途径将正电荷转移到远程位置,并通过弗里德尔-克拉夫茨型反应形成环。