反应详情

To a solution of 4-fluoro-3-hydroxybenzoic acid (1.49 g, 9.55 mmol) in DCM (40 mL) was added TEA (1.2 mL, 8.61 mmol) followed by N,O-dimethylhydroxylamine hydrochloride (1.12 g, 11.5 mmol). The reaction mixture was stirred at room temperature for 3 h, then diluted with DCM, washed with water twice, dried over Na2SO4, filtered and concentrated to yield 4-fluoro-3-hydroxy-N-methoxy-N-methylbenzamide as a colorless oil (1.90 g, 100% yield). LCMS: RT=0.89 min [M+H] 200.10 (Phenomenex Luna C18 column, 4.6×30 mm eluting with 10-90% MeOH/H2O over 2 minutes containing 0.1% TFA; 5 mL/min, monitoring at 220 nm).

1. washwashed with water twice
2. dry with materialdried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated