THE SYNTHESIS OF CONDENSED POLYNUCLEAR HYDROCARBONS BY THE CYCLODEHYDRATION OF AROMATIC ALCOHOLS. VII. CYCLODEHYDRATION INVOLVING THE WAGNER REARRANGEMENT
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.
ring systems between both electron‐rich dienes and dienophiles. However, the most recent examples of this class have been limited to β‐methylstyrenes as dienophiles; the use of non‐conjugated alkenes remains challenging. The present study describes the serendipitous development of novel radical cation Diels‐Alder reactions by electrocatalysis that use non‐conjugated alkenes as dienophiles. The key to successful