Aminophenols are interesting derivatives for chemical and electrochemical studies. Many aminophenol derivatives are known to be effective antioxidants and to be capable of modifying the direction of variousfree-radical processes(1). On the other hand, Aminophenol derivatives are important intermediate for the manufacture products and drug industries. In this research the electrochemical oxidation of 4-methylaminophenol has been studied in the presence of arylsulfinic acids as nucleophiles using cyclic voltammetry and controlled-potential coulometry methods (3). It is known that cyclic voltammetry is a powerfull technique for investigation of electrochemical reactions that are coupled with chemical reactions (1). The results indicate that the arylsulfinic acids participate in Michael type addition reaction with the oxidized form of 4- methylaminophenol, converts it to the corresponding new sulfone derivatives of 4- methylaminophenol. On the basis of our results, depending on the applied potential, two different series of products are isolated (3).
