PURPOSE: To obtain the titled compound useful as a raw material for thiadiazine having herbicidal and insecticidal effect by one process economically advantageously in high yield, by chlorinating an N-methyl-formanilide.
CONSTITUTION: An N-methyl-formanilide shown by the formulaI(R is H, halogen or haloalkyl; n is 1W2) is chlorinated with a chlorinating agent (e.g., chlorine gas, sulfuryl chloride, phosphorus pentachloride, etc.) at 20W150°C preferably at 30W100°C to give a compound shown by the formula II. The amount of the chlorinating agent used is 2W5mol based on 1mol compound shown by the formulaI. Light rays such as sun light, incandescent lamp, mercury vapor lamp, ultraviolet rays, tungsten lamp, etc., peroxide, azobisisobutyronitrile, etc. may be cited as the catalyst. An organic solvent such as benzene, chloroform, etc. may be cited as the solvent, and the reaction can be carried out in the presence of absence of the solvent.
KODAMA HIROYOSHI
YAMAMOTO MORIHARU
