反应详情

温度

140 °C

To a stirred solution of 5-bromo-2-fluoro-3-methylbenzonitrile (1.0 g, 47.716 mmol), in DMF (10.0 mL) was added potassium carbonate (1.95 g, 14.14 mmol) followed by 1H-1,2,4-triazole (0.811 g, 9.433 mmol) at ambient temperature. The reaction mixture was heated to 140° C. for 18 h. The reaction mixture was cooled to ambient temperature, diluted with water and extracted with ethyl acetate (2×100 mL). The combined ethyl acetate layer was washed with brine and dried over Na2SO4 and concentrated under reduced pressure to afford the crude compound purified by flash column chromatography (SiO2, 100-200 mesh; eluting with 30% ethyl acetate/pet ether) to afford the title compound as a pink solid (0.6 g, 49%): 1H NMR (400 MHz, CDCl3) δ 8.39 (s, 1H), 8.23 (s, 1H), 7.91 (d, J=2.4 Hz, 2H), 2.21 (s, 3H), ESIMS m/z 262.57 ([M+H]+); IR (thin film) 2231, 554 cm−1.

1. temperatureThe reaction mixture was cooled to ambient temperature
2. extractionextracted with ethyl acetate (2×100 mL)
3. washThe combined ethyl acetate layer was washed with brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated under reduced pressure
6. customto afford the crude compound
7. custompurified by flash column chromatography (SiO2, 100-200 mesh; eluting with 30% ethyl acetate/pet ether)