Highly diastereo- and enantioselective [3+2] annulation of isatin-derived Morita–Baylis–Hillman carbonates with trifluoropyruvate catalyzed by tertiary amines†
Abstract
An enantioselective [3+2] annulation of Morita–Baylis–Hillman carbonates with trifluoropyruvate catalyzed by modified cinchona alkaloids was developed in good to excellent yields with excellent diastereo- and enantioselectivities.