A number of N-alkyl-2 (3H)-benzothiazolone analogs could be prepared from N- monosubstituted aniline and chlorocarbonylsulfenyl chloride. The new method consists of carbamoylation of aniline and successive Friedel-Crafts type ring closure of an intermediate carbamoylsulfenyl chloride in the presence of suitable Lewis or protic acid catalyst.
