Oxidation of Primary Aromatic Amines to Azo Derivatives with Sodium Periodate using Polystyrene-Bound Manganese(III) Porphyrin

The manganese (III) complex of 5,10,15,20-tetrakis(4-aminophenyl)porphyrin covalently bound to crosslinked chloromethylated polystyrene [Mn(H 2 NTPP)-CMP] can act as an efficient catalyst for oxidation of primary aromatic amines to the corresponding azo compounds by sodium periodate in the presence of imidazole as axial ligand.