Metal-free difunctionalization of alkynes to access tetrasubstituted olefins through spontaneous selenosulfonylation of vinylidene ortho-quinone methide (VQM)

A metal-free protocol for difunctionalization of alkynes through spontaneous selenosulfonylation of vinylidene ortho-quinone methide (VQM) was developed with good yields and excellent stereoselectivities.