Selenosulfonation: boron trifluoride catalyzed or thermal addition of selenosulfonates to olefins. A novel regio- and stereocontrolled synthesis of vinyl sulfones
by the direct selenosulfonylation of alkenes. This protocol is operationally simplistic, has a wide substrate scope, uses readily available seleno and sulfonyl sources, and is amenable to gram-scale synthesis. This reaction represents a significant addition to the limited number of reactions available for the intermolecular selenide difunctionalization of alkenes and would be useful for the synthesis