反应详情

Methyl 3-amino-2-fluorobenzoate hydrochloride (7.77 g, 0.037 mol) was suspended in methylene chloride (100 ml), and pyridine (6.94 g, 0.085 mol) was added dropwise thereto. Benzoyl chloride (5.78 g, 0.041 mol) was added dropwise to this reaction mixture under cooling, and the mixture was agitated overnight at room temperature. After completion of the reaction, the reaction mixture was washed sequentially with a 1N hydrochloric acid, a saturated aqueous solution of sodium bicarbonate, and saturated saline, and the reaction mixture was dried over anhydrous sodium sulfate. The sodium sulfate was filtered away, and then the filtrate was concentrated under reduced pressure. The concentration residue was recrystallized from ethyl acetate, as a result of which 8.79 g (yield: 85%) of the indicated compound was obtained.

1. temperatureunder cooling
2. customAfter completion of the reaction
3. washthe reaction mixture was washed sequentially with a 1N hydrochloric acid
4. dry with materiala saturated aqueous solution of sodium bicarbonate, and saturated saline, and the reaction mixture was dried over anhydrous sodium sulfate
5. filtrationThe sodium sulfate was filtered away
6. concentrationthe filtrate was concentrated under reduced pressure
7. customThe concentration residue was recrystallized from ethyl acetate