PREPARATION OF BENZOTHIAZOLONE DERIVATIVE

PURPOSE:To obtain the titled compound, by subjecting N-(2-chlorophenyl)-N- methyl-carbamoylsulfenyl chloride prepared from 2-chloro-N-methylaniline and chlorocarbonylphenyl chloride to ring formation with an acid. CONSTITUTION:N-(2-chlorophenyl)-N-methylcarbamoylsulfenyl chloride shown by the formulaIis subjected to ring formation with an acid such as Lewis acid, proton acid, etc., to give a benzothiazolone derivative (e.g., 4-chloro-N- methylbenzothizole-2-one, etc.) shown by the formula II. The compound shown by the formulaIis obtained by reacting 2-chloro-N-methylaniline with chlorocarbonylsulfenyl chloride in the presence of a scavenger such as trimethylamine, pyridine, etc. EFFECT:Capable of being prepared by a small number of processes and by simple operations. USE:A nonmedical germicide.