Tetrabutylammonium iodide catalyzed allylic sulfonylation of α-methyl styrene derivatives with sulfonylhydrazides

Sulfonyl radicals generated from sulfonylhydrazides by the Bu4NI-tert-butyl hydroperoxide (TBHP) catalysis system underwent addition to a variety of alpha-methyl styrene derivatives to give the corresponding allylic sulfones. This selective allylic sulfonylation is metal-free, operationally simple, and environmentally friendly.