Synthesis, characterization and catecholase activity of copper (II) complexes with bispyrazole tri-podal Ligands

The synthesis of series of tripodal ligands: N,N-bis((3-carboxyethyl-5-dimethyl-1H-pyrazol-1-yl)methyl)phenylamine L1, N,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)phenylamine L2, N,N-bis((3-carboxyethyl-5-dimethyl-1H-pyrazol-1-yl)methyl)pyridin-2-ylamine L3, N,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)pyridin-2-amine L4, N,N-bis((3-carboxyethyl-5-dimethyl-1H-pyrazol-1-yl)methyl)-2-nitrophenylamine L5, N,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)-2-nitrophenylamine L6 were reported. Copper (II) complexes of these compounds prepared in-situ were examined for their catalytic oxidative activities. The effect of the nature of the ligand and the copper salts on the catecholase activities will be also investigated. Mechanistic studies were also discussed.