Palladium-Catalyzed Cyclization/Alkenylation of Ynone Oximes with Vinylsilanes for the Assembly of Isoxazolyl Vinylsilanes

A palladium-catalyzed cascade cyclization/alkenylation for the assembly of synthetically valuable isoxazolyl vinylsilane derivative has been accomplished. Easily accessible ynone oximes, and available vinylsilane agents were used as the reaction starting materials This protocol features broad substrate scope, good functional group tolerance, and good step- and atom-economy. Remarkably, this approach provides a new approach for the construction of structurally diverse isoxazolyl-containing vinylsilanes with high molecular complexity, showing a promising application in synthetic and pharmaceutical chemistry. A novel and efficient palladium-catalyzed cascad cyclization/alkenylation of ynone oximes with various vinylsilane agents for the assembly of synthetically valuable isoxazolyl vinylsilane derivative has been accomplished. Under the optimized conditions, a wide array of ynone oximes can be efficiently converted into the isoxazolyl vinylsilanes in moderate to good yields with eminent functional group compatibility. image