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)nlethyl)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 11.8250 mu mol L-1 min(-1) for the L-2[Cu(CH3CO2)(2)] complex to a weaker rate of 0.7875 mu mol L-1 min(-1) for L-3[Cu(NO3)(2)]. (C) 2009 Elsevier B.V. All rights reserved.