[NH2:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([OH:7])=[O:6].[F:11][C:12]([F:23])([F:22])[C:13]1[CH:14]=[C:15]([CH:19]=[CH:20][CH:21]=1)[C:16](Cl)=[O:17]>C1COCC1>[F:11][C:12]([F:22])([F:23])[C:13]1[CH:14]=[C:15]([CH:19]=[CH:20][CH:21]=1)[C:16]([NH:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([OH:7])=[O:6])=[O:17]To a stirring solution of 3-aminobenzoic acid (1.1 g, 7.9 mmol) in anhydrous THF (20 mL), 3-(trifluoromethyl)benzoyl chloride (2.0 g, 9.6 mmol) was added slowly. The mixture was stirred at room temperature under argon for overnight. The solvent was removed under reduced pressure and re-crystallized from chloroform to afford the title compound as a white solid (1.2 g, 49%).
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