TBAI/K₂S₂O₈-facilitated reaction of sulfonylhydrazides with alkynes: Facile synthesis of (<i>E</i>)-β-iodovinyl sulfones

<p>An efficient and convenient approach for the construction of various (<i>E</i>)-β-iodovinyl sulfones has been developed through potassium persulfate/tetrabutylammonium iodide-facilitated reaction of sulfonylhydrazides with alkynes. The products were obtained in good to excellent yields. The salient features of this reaction are the applications of a new iodine source, environmentally benign, safer solid oxidant, and shorter reaction time.</p