title: Practical Oppenauer (OPP) oxidation of alcohols with a modified aluminum catalyst.
abstract: [reaction: see text] Modified aluminum catalyst 2 was found to be highly effective for Oppenauer (OPP) oxidation of alcohols under mild conditions. For example, oxidation of carveol in toluene with t-BuCHO (1.2 equiv) as a hydride acceptor in the presence of 2 (1 mol %) proceeded smoothly at 21 degrees C to give carvone in 94% yield after 1 h. A practical aspect of this system was highlighted by the facile OPP oxidation of terpenoids and steroids with 1.2-3.0 equiv of acetone and 2 (3-5 mol %).
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Ooi
authors.forename: Hidehito
authors.initials: H
authors.lastname: Otsuka
authors.forename: Tomoya
authors.initials: T
authors.lastname: Miura
authors.forename: Hayato
authors.initials: H
authors.lastname: Ichikawa
authors.forename: Keiji
authors.initials: K
authors.lastname: Maruoka