title: Transition metal salts-catalyzed aza-Michael reactions of enones with carbamates.
abstract: Several transition metal salts were found to catalyze aza-Michael reactions of enones with carbamates efficiently. The catalytic activity was strongly dependent on the nature of the metal salts. While conventional Lewis acids such as BF(3).OEt(2), AlCl(3), or TiCl(4) showed lower activity, group 7-11 transition metal salts in higher oxidation states such as ReCl(5), Fe(ClO(4))(3).9H(2)O, RuCl(3).nH(2)O, OsCl(3).3H(2)O, RhCl(3).nH(2)O, PtCl(4).5H(2)O, or AuCl(3).H(2)O exhibited higher catalytic activity. [reaction: see text]
authors.affiliation: Graduate School of Pharmaceutical Science, The University of Tokyo and CREST, Japan Science and Technology Corporation (JST), Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. skobayas@mol.f.u-tokyo.ac.jp
authors.forename: Shū
authors.initials: S
authors.lastname: Kobayashi
authors.forename: Kentaro
authors.initials: K
authors.lastname: Kakumoto
authors.forename: Masaharu
authors.initials: M
authors.lastname: Sugiura
mesh_terms: D002219:Carbamates / Q000737:chemistry*; D002384:Catalysis; D007202:Indicators and Reagents; D008670:Metals / Q000737:chemistry*; D010084:Oxidation-Reduction; D012492:Salts
chemical_list: D002219:Carbamates; D007202:Indicators and Reagents; D008670:Metals; D012492:Salts