title: A sustainable two-phase procedure for V-catalyzed toluene oxidative bromination with H2O2-KBr.
abstract: A sustainable V(V) and Mo(VI) catalysed two-phase procedure for bromination of toluene under quite mild conditions is proposed; H2O2 is the primary oxidant and KBr is the bromine source; metal precursors are commercially available salts. The reaction is efficient without any additional solvent. By using PhCH3 as a solvent/substrate good yields, together with interesting selectivity toward the formation of PhCH2Br, are obtained with both metal ions. Recycling of the catalytic phase is also possible. Useful information on the V-peroxido chemistry was obtained.
authors.affiliation: Department of Chemical Sciences and Technologies, University of Roma Tor Vergata, Via Ricerca Scientifica snc, Rome, 00133, Italy.
authors.forename: Pierluca
authors.initials: P
authors.lastname: Galloni
authors.forename: Marco
authors.initials: M
authors.lastname: Mancini
authors.forename: Barbara
authors.initials: B
authors.lastname: Floris
authors.forename: Valeria
authors.initials: V
authors.lastname: Conte
mesh_terms: D001965:Bromides / Q000737:chemistry*; D002384:Catalysis; D006842:Hydrocarbons, Brominated / Q000138:chemical synthesis* / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D015394:Molecular Structure; D008982:Molybdenum / Q000737:chemistry; D010084:Oxidation-Reduction; D017680:Potassium Compounds / Q000737:chemistry*; D014050:Toluene / Q000737:chemistry*; D014639:Vanadium / Q000737:chemistry*
chemical_list: D001965:Bromides; D006842:Hydrocarbons, Brominated; D017680:Potassium Compounds; D014639:Vanadium; D014050:Toluene; D008982:Molybdenum; D006861:Hydrogen Peroxide; C039004:potassium bromide