| Abstract |
The benzoyl hydrazone based dimeric dicopper(II) complex [Cu-2(R)(CH3O)(NO3)](2)(CH3O)(2) (R-Cu2+), recently reported by us, catalyzes the aerobic oxidation of catechols (catechol (S1), 3,5-ditertiarybutylcatechol (S2) and 3-nitrocatechol (S3)) to the corresponding quinones (catecholase like activity), as shown by UV-Vis absorption spectroscopy in methanol/HEPES buffer (pH 8.2) medium at 25 degrees C. The highest activity is observed for the substituted catechol (S2) with the electron donor tertiary butyl group, resulting in a turnover frequency (TOF) value of 1.13 x 10(3) h(-1). The complex R-Cu2+ also exhibits a good catalytic activity in the oxidation (without added solvent) of 1-phenylethanol to acetophenone by (BuOOH)-O-t under low power (10 W) microwave (MW) irradiation. (C) 2014 Elsevier B.V. All rights reserved. |
