Free-radical carbo-alkenylation of enamides and ene-carbamates.

The addition of xanthates and vinyldisulfones across the double bond of enamides and ene-carbamates provides access to the corresponding three-component adducts in good to excellent yields with a high level of diastereocontrol in cyclic systems. This strategy illustrates a complementary reactivity for these versatile olefins and extends their scope of application.