The azidosulfonylation of terminal alkynes leading to β-azidovinyl sulfones.

We report herein the first example of the N radical-mediated azidosulfonylation of alkynes, affording the β-azidovinyl sulfone products with a broad substrate scope, excellent functional group compatibility, and high yield. DFT calculations suggest that the mechanism of the reaction proceeds through an unprecedented sequential N radical addition and sulfonyl radical coupling pathway.