4-chloro-2-fluoro-1-(trichloromethyl)benzene

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-chloro-2-fluoro-benzotrichloride (III) obtained in step (A) is chlorosulfonylated by treatment with sulfuric chlorohydrin in the presence of sulfuric acid and the resulting product is ammonolyzed by treatment with ammonium hydroxide to give 4-chloro-2-fluoro-5-sulfamoyl-benzoic acid (IV);