Electrosynthesis of 3-Nitrophenotiazine. Nitration in Non-Aqueous Solutions

The nitration of Phenothiazine (PHEN) in acetonitrile (ACN) in the presence of excess NaNO2 has been studied in detail. First, the electrochemical behavior of the reactants was investigated by cyclic voltammetry to determine the electrolysis conditions. Controlledpotential electrolysis was used for the electrosynthesis. Introduction Although the nitration of organic compounds is an area in expansion since the beginning of the century principles, its interest has not diminished. In this way, new nitration methods that outline new challenges for the interpretation of the mechanisms have appeared. The principal interest resides in that the nitrated products are fundamental source of diverse synthetic products [1-3]. The traditional nitration methods, which use aggressive mixtures of nitric and sulfuric acid, are being left, due to the high cost of the effluents treatment [4]. The electrochemical methods are an excellent way to produce the nitration intermediates [5]. Besides, it constitutes an interesting alternative procedure from the mechanistic point of view.