cis-Selective single-cleavage skeletal rearrangement of 1,6-enynes reveals the multifaceted character of the intermediates in metal-catalyzed cycloisomerizations
E. Jiménez-Núñez, C. K. Claverie, C. Bour, D. J. Cárdenas, A. M. Echavarren
Angew. Chem. Int. Ed. 2008, 47, 7892-7895
Abstract: The unprecedented title rearrangement of 1,6-enynes has been observed with gold and platinum catalysts (see scheme, [M] = metal catalyst, Z = C(CO2Me)2, R = electron-donating group). This reaction is proposed to proceed through an open carbocationic species.