Aryl-tetrachloro-aza-propenes and process for the production thereof

摘要

The invention comprises 3-aryl-1,1,3,3-tetrachloro-2-aza -propenes of formula FORM:0981705/C2/1 where Ar represents an aryl radical which may contain substituents such as halogen atoms, aryl radicals, perhalogenated alkyl and cycloalkyl radicals, arylalkyl radicals perhalogenated in the alkyl radical, phenoxy, nitro, nitrile, SO2Cl, ClCO-, RCO-. The compounds may be made by chlorinating an aryl methyl mustard oil ArCH2-N = C = S initially at a temperature below 50 DEG C. to form the arylmethyl isocyanide dichloride, removing the sulphur dichloride formed and further chlorinating at temperatures above 50 DEG C., if desired while exposed to light. The chlorination may be effected with elementary chlorine in an inert solvent or a chlorinating agent such as sulphuryl chloride may be used. Examples describe the preparation of 3 - phenyl - 1,1,3,3 - tetrachlor - 2 - aza - propene-, 3 - (41 - chlorophenyl)-1,1,3,3 - tetrachlor - 2 - aza - propene; 3-(31,41 - dichlorophenyl) - 1,1,3,3 - tetrachlor-2-azapropene.