PREPARATIVE ELECTROSYNTHESIS OF SODIUM-SALTS OF N-CHLORAMIDES OF ARYLSULFONIC ACIDS

Regularities of the electrochemical chlorination of arylsulfonamides s uspended in an aqueous solution of NaCl were studied under conditions of nondiaphragm electrolysis. It was established that, to suppress sid e reactions, a temperature from 10 to 20 degrees C and highly concentr ated solutions of NaCl should be used. This provided the efficient sal ting out of the chlorinated products, namely, Na salts of N-chlorine d erivatives of arylsulfonamides, during the electrolysis. The condition s were found for a preparative electrosynthesis of salts of N-chlorine derivatives of n-tolylsulfonamide, phenylsulfonamide, and n-chlorophe nylsulfonamide with the product yield and the current efficiency of ta rget products that are equal to 97% each, at 98% conversion of startin g arylsulfonamides.