Gold-Catalyzed Dehydrazinative C(sp)-S Coupling Reactions of Arylsulfonyl Hydrazides with Ethynylbenziodoxolones for Accessing Alkynyl Sulfones: Gold-Catalyzed Dehydrazinative C(sp)-S Coupling Reactions of Arylsulfonyl Hydrazides with Ethynylbenziodoxolones for Accessing Alkynyl Sulfones

A gold(III)-catalyzed dehydrazinative coupling reaction between TIPS-EBX and arylsulfonyl hydrazides has been realized for the synthesis of arylalkynyl sulfones. The scope and versatility of the reaction has been demonstrated by efficient synthesis of 23 derivatives with diverse structural features.