Abstract
Herein, metal-free radical Heck-type reaction of styrenes with sulfonyl hydrazides to synthesize vinyl sulfones is developed. The reaction is performed under economical TBAI/TBHP system on water in open air at room temperature, which proceeds through the radical addition to styrenes followed by hydrogen-abstraction. When compared to known approaches for the synthesis of vinyl sulfones from alkenes, this radical Heck-type strategy is practical, green and does not go through HI elimination process. Furthermore, this protocol can be expanded to the iodosulfonylation of alkynes for the synthesis of iodovinyl sulfones.
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