Novel rearrangement of an (η4-2-pyrone)iron complex
Abstract
(Tricarbonyl)(η4-5,6-dimethoxy-4-methoxycarbonyl-2-pyrone(iron (1) rearranges thermally to tricarbonyl)(η4-5,6-dimethoxy-3-methoxycarbonyl-2-pyrone)iron (8) and the structures of (1) and (8) have been determined by X-ray analyses; a mechanism involving (η3)-vinylcarbene)iron complexes and a novel 1, 4-oxygen shift reaction are proposed for the rearrangement.