Bis(cyclopentadienyl)tetracarbonyldimolybdenum-alkyne complexes mediated [2 + 2 + 1] cycloaddition: the formation of 3-substituted cyclopentenone derivatives

Abstract

On heating, bis(cyclopentadienyl)tetracarbonyldimolybdenum-alkyne complexes undergo a [2 + 2 + 1] cycloaddition with norbornadiene or norbornene to afford the corresponding-3 substituted cyclopentenone derivatives, which could heardly be obtained in the cobalt-complexed alkyne-mediated Pauson-Khand reaction.