反应详情

温度

180 °C

4-Chloro-1-fluoro-2-nitrobenzene (20.0 g, 0.11 mol) and K2CO3 (15.7 g, 0.11 mol) were dissolved in N-methylaniline (37 mL, 0.34 mol) and subsequently heated to 180° C. After 5 h, the reaction mixture was cooled to room temperature, diluted with CH2Cl2 (750 mL) and washed with H2O (500 mL), aq. citric acid (5% 500 mL) and brine (500 mL). The organic layer was dried (Na2SO4) and concentrated under reduced pressure. The residual oil was chromatographed over silica (cyclohexane/CH2Cl2, 9/1, v/v) giving title compound containing ˜30% starting material. The compound was subsequently stirred in cold hexane and the resulting red crystals were filtered resulting in pure crystalline product (16.5 g, 57% yield). Data: melting point: 59-62° C., Rf 0.65 (cyclohexane/ethyl acetate, 4/1, v/v).

1. temperaturethe reaction mixture was cooled to room temperature
2. washwashed with H2O (500 mL), aq. citric acid (5% 500 mL) and brine (500 mL)
3. dry with materialThe organic layer was dried (Na2SO4)
4. concentrationconcentrated under reduced pressure
5. customThe residual oil was chromatographed over silica (cyclohexane/CH2Cl2, 9/1