A green/sustainable synthesis is much more important than conventional synthetic methods. The concept and significance of green sustainable chemistry (GSC), has been recognized throughout the world, and nowadays new processes cannot be developed without consideration of GSC. In recent years, much attention has been paid to electroorganic synthesis as a typical environmentally friendly process[1,2]. Furthermore, sulfone compounds and sulfonamide derivatives are found in a wide variety of antibiotic drugs. These compounds have an effective inhibitory effect against the bacteria and antimicrobials effect against the wide range of human pathogens[3]. These advances and the importance of sulfonamides has promoted us to synthesize a number of these compounds. In this work, electrochemical oxidation of 4,4′-diaminodiphenyl ether in the presence of arylsulfinic acids have been studied using cyclic voltammetry and constant current coulometry. The results show that 4,4′-diaminodiphenyl ether is oxidized to its corresponding quinone-imine. The formed quinone-imines are then attacked by arylsulfinic acids. Two successive additions of the arylsulfinic acids give the final products in good yield and high purity (scheme1).
