SULFONAMIDE PORPHYRINS IN THE BIOMIMETIC OXIDATION BY H2O2 - AN EFFICIENT 2-PHASE SYSTEM

A catalytic biphasic aqueous/organic system for hydrogen peroxide oxid ations was studied and improved, and a new metalloporphyrin derived fr om meso-tetrakis-2,6-dichlorophenylporphyrin bearing five sulphonamide side chains in the mesophenyls and in one of the beta-positions was s ynthesised and established as an highly efficient and stable catalyst working in the newly developed system. An interface mechanism is propo sed to interpret the role of lipophilic acids as co-catalysts, the eff iciency of the catalysis and the stability of the catalyst in the new system.