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A green, facile and tunable pair electrochemical process was developed for the synthesis of new benzenesulfonamide derivatives by using reductive controlled potential electrolysis of dinitrobenzene (DNB) in the presence of arylsulfinic acids (ASAs). In addition to the usual features associated with paired electrochemical methods, eg high energy efficient, this method has a tunable characteristic, so that, by adjusting the potential, different products can be synthesized. By applying the potential of −0.4 V vs. Ag/AgCl,  N -hydroxy- N -(4-nitrophenyl)benzenesulfonamide derivatives are selectively formed, while, by applying the potential of −1.1 V vs. Ag/AgCl, the final products are  N -(4-amino-3-(phenylsulfonyl)phenyl) benzenesulfonamide derivatives. This work beautifully shows the potential applications of the electrochemistry as a powerful tool for the synthesis of organic compounds.

A tunable pair electrochemical strategy for the synthesis of new benzenesulfonamide derivatives