Elsevier, Journal of Molecular Catalysis A: Chemical, 1-2(306), p. 113-117
DOI: 10.1016/j.molcata.2009.02.031
Full text: Download
A synthesis of five functional multidendate ligand: methyl 2-(bis((3,5-dimethyl-1H–pyrazol-1-yl)methyl)amino)acetate L1, methyl 2-(bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)amino)-propanoate L2, methyl 2-(bis((3,5-dimethyl-1H-pyrazol-1-yl) methyl) amino)-3-methylbutanoate L3, methyl 2-(bis((3,5-dimethyl-1H-pyrazol-1-yl) methyl) amino)-3-methyl- pentanoate L4 and methyl 6-(bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)amino)hexanoate L5 is reported. Copper (II) complexes of these compounds were examined for their catalytic properties. The in situ generated copper (II) complexes were suitable catalysts for the catalytic oxidation of catechol substrate to quinone with dioxygen at ambient condition. All complexes catalyze the oxidation reaction with the rate varying from a high of 11.8250μmolL−1min−1 for the L2[Cu(CH3CO2)2] complex to a weaker rate of 0.7875μmolL−1min−1 for L3[Cu(NO3)2].