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    HYDROGENATION OF ACETOPHENONE AND ITS DERIVATIVES WITH 2-PROPANOL USING AMINOMETHYLPHOSPHINE-RUTHENIUM CATALYSIS
    (Taylor & Francis Ltd, 2010) Keles, Mustafa; Keles, Tugba; Serindag, Osman; Yasar, Sedat; Ozdemir, Ismail
    The reaction of 3'-aminopropyltriethoxysilane with the phosphonium salt ([Ph2P(CH2OH)(2)]Cl) gives an aminomethylphosphine-type ligand ((CH3CH2O)(3)Si(CH2)(3)N(CH2PPh2)(2)). Reaction of the ligand ((CH3CH2O)(3)Si(CH2)(3)N(CH2PPh2)(2)) with silica gives silica supported aminomethylphosphine ligand (SiO2)-O-Si(CH2)(3)N(CH2PPh2)(2)). The ligands were refluxed with [RuCl2(p-cymene)](2) in toluene to give [RuCl2((CH3CH2O)(3)Si(CH2)(3)N(CH2PPh2)(2))] and silica-supported SiO2)-O-[RuCl2((Si(CH2)(3)N(CH2PPh2)(2))(2)] complex, respectively. The catalytic studies show that the complexes [RuCl2((CH3CH2O)(3)Si(CH2)(3)N(CH2PPh2)(2))] and SiO2)-O-[RuCl2((CH3CH2O)(3)Si(CH2)(3)N(CH2PPh2)(2))(2)] are very active catalysts for the transfer hydrogenation of acetophenone by 2-propanol in basic media. The best yield was observed in hydrogenation of m-methoxy acetophenone (95%) with catalyst [RuCl2((CH3CH2O)(3)Si(CH2)(3)N(CH2PPh2)(2))].