[F:1][C:2]1[C:10]([F:11])=[C:9]([F:12])[CH:8]=[C:7]([F:13])[C:3]=1[C:4](O)=[O:5].S(Cl)([Cl:16])=O>>[F:1][C:2]1[C:10]([F:11])=[C:9]([F:12])[CH:8]=[C:7]([F:13])[C:3]=1[C:4]([Cl:16])=[O:5]38.8 g of 2,3,4,6-tetrafluorobenzoic acid, a known compound, was treated with thionyl chloride to give 36 g of 2,3,4,6-tetrafluorobenzoyl chloride as an oil. b.p. 87°-89° C. (36 mmHg).
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