2003•Journal of the American Chemical SocietyRequires access

New Fischer Carbene Complexes of Rhodium(I): Preparation and 2-Cyclopentenone Ring Synthesis by Annelation to Alkynes

José Barluenga, R. Vicente, Luís A. López, Eduardo Rubio, Miguel Tomás, C. Álvarez-Rúa

Abstract

A new type of metal carbene complexes of group 9, specifically a cationic Fischer carbene of rhodium(I), has been synthesized from chromium carbene complexes via double transfer of carbene and CO ligands. These complexes reveal a different reactivity than other transition metal carbenes, including their chromium precursors, toward neutral and electron-poor alkynes, giving selectively polysubstituted cyclopentenones.

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Key concepts: Carbene, Chemistry, Rhodium, Transition metal carbene complex, Annulation, Chromium, Reactivity (psychology), Cyclopentenone