[Cl:1][C:2]1[CH:20]=[C:19]([C:21]([F:24])([F:23])[F:22])[CH:18]=[C:17]([Cl:25])[C:3]=1[O:4][C:5]1[CH:6]=[CH:7][C:8]([N+:14]([O-:16])=[O:15])=[C:9]([CH:13]=1)[C:10]([OH:12])=O.CN(C)C=O.S(Cl)([Cl:33])=O.C>ClCCCl>[Cl:1][C:2]1[CH:20]=[C:19]([C:21]([F:24])([F:22])[F:23])[CH:18]=[C:17]([Cl:25])[C:3]=1[O:4][C:5]1[CH:6]=[CH:7][C:8]([N+:14]([O-:16])=[O:15])=[C:9]([CH:13]=1)[C:10]([Cl:33])=[O:12]79.2 g of 5-(2,6-dichloro-4-trifluoromethyl-phenoxy)-2-nitro-benzoic acid and 0.5 ml of dimethylformamide were introduced into 150 ml of 1,2-dichloro-ethane. 28.6 g of thionyl chloride were added dropwise at 60° to 65° C. and the mixture was heated under reflux for 1 hour. The solution was clarified with active charcoal and filtered through kieselguhr. The mother liquor was concentrated and the residue was recrystallized from cyclohexane. 65.1 g (79% of theory) of 5-(2,6-dichloro-4-trifluoromethyl-phenoxy)-2-nitro-benzoic acid chloride, of melting point 95° C., were obtained.
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