Reactions of transition-metal η1-allyl and propargyl complexes with ketenes and some new nonoxidative transition-metal-carbon bond cleaving reactions of the ketene cycloadducts which yield cyclopentenones

Article abstract of DOI:10.1016/0022-328X(94)05071-I

Reactions of cyclopentadienyl iron 2-alkynyl and allyl complexes with ketenes or ketene precursors yield transition-metal substituted cyclopentenones in some cases and new transition-metal substituted allyl complexes in others.The transition metals can subsequently be cleaved from the cyclopentenone containing complexes under a variety of oxidative and nonoxidative reaction conditions. Keywords: Iron; Allyl complexes; Alkynyl complexes; Ketenes; Cycloadditions; Cyclopentenones