Abstract
Abstract N-phenylmaleimides, o-, m-and p-substituted (1) reacted with excess chlorosulfonic acid to give the corresponding sulphonyl chlorides (2–5). These were condensed with amines and phenols to give derivatives (7–29) which underwent hydrolysis or ammonolysis to give respectively the sulfamoyl maleamic acids (31–34) and sulfamoyl maleamides (35–39).
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