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1. In a 100 mL reaction flask, 2-fluoro-6-nitrobenzoic acid (9.25 g, 0.05 mol) and carbonyldiimidazole (CDI) (8.9 g, 0.055 mol) were dissolved in 60 mL of DMF, and the reaction was stirred for 1 hr at 25 °C. Subsequently, aniline (5.6 g, 0.06 mol) was added to the reaction system and the reaction continued to be stirred at 25 °C for 5 hours. After completion of the reaction, the reaction solution was concentrated to dryness and extracted by adding 100 mL of water and 100 mL of dichloromethane to separate the organic phase. The dichloromethane layer was washed twice with water, and the combined organic layers were washed twice with saturated brine and dried over anhydrous sodium sulfate. Finally, the organic phase was concentrated under reduced pressure to afford 2-fluoro-6-nitro-N-phenylbenzamide (12.9 g) in 98.5% yield and 98% purity.