A Two-Component Pericyclic Reaction for Synthesis of Substituted Benzofurans and Aryl−Quaternary Carbon Bonds1
摘要:
The reaction shown is presumed to be a new [3,3]-sigmatropic rearrangement involving an O-arylsulfoxonium species or related sulfurane, It allows a sulfoxide and a phenol to be joined and rearranged in one operation at or below room temperature, coupling an aromatic to a quaternary carbon and creating benzofurans or articulated dihydrobenzofurans in a number of examples.[Graphics]