摘要:
Though Fischer carbene complexes do not, in general, react with unactivated alkenes, Fischer carbene complexes of molybdenum and chromium have been found to readily monocyclopropanate many simple 1,3-dienes in good-to-excellent yields, with high levels of chemo-, regio-, and stereoselectivity. A mechanism involving the intermediacy of an eta-1-alkyl, eta-3-allyl complex is proposed to account for this selectivity.