Base-promoted synthesis of diarylsulfones from sulfonyl hydrazines and diaryliodonium salts.

An efficient and concise method for the synthesis of diverse substituted sulfones was developed with high selectivity. Using n -PrOH as the solvent, diaryl sulfones are formed even on a gram scale via metal-free coupling from sulfonyl hydrazines with symmetrical or unsymmetrical diaryliodonium salts.