An improved method for preparation of N-alkyl-2 (3H)-benzothiazolone analogs.

Y Tanabe, T Okabe, A Kakimizu, N Ohno…

Index: Tanabe; Okabe; Kakimizu; et al. Bulletin of the Chemical Society of Japan, 1983 , vol. 56, # 4 p. 1255 - 1256

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Abstract

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.