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Amination of p-toluenesulfinic acid with O-mesitylenesulfonylhydroxylamine in dichloromethane gave p-toluenesulfonamide (4) together with mesitylenesulfonic anhydride (6). Similarly, the reactions with N-chloramines and N-chlorimines afforded the corresponding N-substituted p-toluenesulfonamides (7) and p-toluenesulfonyl chloride (8).
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NISHIKAWA et al. (1983) studied this question.
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