Free-Radical Carbo-alkenylation of Enamides and Ene-carbamates
摘要:
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.
Free-Radical Carbo-alkenylation of Enamides and Ene-carbamates
摘要:
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.
The three‐component free‐radical carbo‐alkenylation of electron‐richolefins has been studied, varying the substitution pattern in the alkene, in the radical precursor and in the final acceptor. New vinylsulfones were also prepared and their reactivity investigated. The scope and limitations of the process was established, and the reaction mechanism clarified using selected dienes as radical clocks