Rhodium-catalyzed addition of sulfonyl hydrazides to allenes: regioselective synthesis of branched allylic sulfones†
Abstract
A rhodium-catalyzed regioselective addition of sulfonyl hydrazides to allenes is reported. With Rh(I)/DPEphos/benzoic acid as the catalyst system, branched allylic sulfones can be obtained, in good to excellent yields and regioselectivities.