Research School of Chemistry, Australian National University, Canberra, A.C.T. 2600 Australia
Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106 U.S.A.
Abstract:
Friedel-Crafts acetylation of dicarbonyl(η4-cyclohexadiene)triphenylphos-phineiron is accomplished in 96% yield under mild conditions to give dicarbonyl-(η4-5-endo-acetylcyclohexa-1,3-diene)triphenylphosphineiron. The structure of the product was established by direct comparison with the epimeric complex dicarbonyl(η4-5-exo-acetylcyclohexa-1,3-diene)triphenylphosphineiron produced by reaction of methyl magnesium iodide with dicarbonyl(η4-5-exo-cyanocyclohexa-1,3-diene)triphenylphosphineiron.