Abstract
Copper(II) N,N′-bis[4-(N,N-diethylamino)salicylidene]ethylenediamine (CAS) complex, which has the metal–ligand coordination “CuN2O2” that mimics the galactose enzyme active site, was synthesised and incorporated onto the organo-modified MCM-48. The supported CAS catalyst successfully catalysed the conversion of o-aminophenol to 2-amino-3H-phenoxazon-3-one in the presence of aqueous peroxide as oxidant. The catalytic performance of the CAS supported on organo-modified MCM-48 was found highly affected by the temperature, the type of aqueous peroxide and reaction solvent used. A salen-type copper complex of N2O2 donor ligand was synthesised and incorporated onto the modified MCM-48. The corresponding supported catalysts are active in the oxidation of o-aminophenol to 2-amino-3H-phenoxazin-3-one in the presence of peroxide as an oxidant.
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