Palladium-catalyzed One-step Synthesis of Symmetrical Diaryl Sulfones from Aryl Halides and a Sulfur Dioxide Surrogate

摘要

A convenient method for the one-step synthesis of symmetrical diaryl sulfones from aryl halides has been developed. A keystone of the method is the use of K2S2O5, which can be easily and safely handled, as a sulfur dioxide surrogate. The palladium catalyst bearing P(t-Bu)(3) as a ligand enables formation of the desired sulfones without significant formation of byproducts.