Novel double insertion reactions of carbenes into the cobalt–carbon bonds of a cobalt–cyclopentadienyl metallocycle

Abstract

The reaction [(η⁵-C₅H₅)[graphic omitted]Me)(PPh₃)] with α-diazo ketones results in the novel double insertion of carbene fragments to form a proposed cobaltacycloheptadiene intermediate which undergoes reductive elimination to form an η⁴-coordinated triene.