Facile synthesis of substituted diaryliodonium tosylates by treatment of aryltributylstannanes with Koser’s reagent

A facile synthesis of substituted diaryliodonium tosylates (toluene-p-sulfonates) was developed, based on the treatment of substituted aryltributylstannanes with Koser’s reagent [hydroxy(tosyloxy)iodobenzene]. In this manner, several new diaryliodonium salts, bearing one or more substituents on one aryl ring, were prepared in useful yields under mild conditions (dichloromethane, room temperature, 2 h).