Gold(I)-catalyzed intermolecular cyclopropanation of enynes with alkenes: trapping of two different gold carbenes
S. López, E. Herrero-Gómez, P. Pérez-Galán, C. Nieto-Oberhuber, A. M. Echavarren
Angew. Chem. Int. Ed. 2006, 45, 6029-6032
Abstract: Intermolecular cyclopropanation reactions of enynes with alkenes allows the synthesis of complex cyclic systems with gold(I) catalysts under mild conditions. Furthermore, gold carbenes are trapped intermolecularly with alkenes (see scheme; L=ligand), thereby providing experimental evidence for the involvement of two different types of metal carbenes in the skeletal rearrangement of enynes.