反应详情

温度

0 °C

A solution of 2-bromopyridin-4-amine (0.74 g, 4.3 mmol) in DMF (5 mL) was added to a cooled (0° C.) mixture of NaH (0.31 g, 7.82 mmol, 60% in mineral oil) in DMF (15 mL). The resulting mixture was stirred for 20 minutes at 0° C. and then a solution of 2,6-dichlorobenzoyl chloride (0.82 g, 3.91 mmol) in DMF (5 mL) was added dropwise. The reaction was stirred at 0° C. for 4 hours and then poured onto ice-water (20 mL). The precipitate was collected and filtrate was extracted by EtOAc (2×50 mL). The combined organic extracts were dried over Na2SO4 and concentrated under reduced pressure. The resulting solid was combined with the precipitate to afford N-(2-bromopyridin-4-yl)-2,6-dichlorobenzamide (1.0 g, Yield: 74%). 1HNMR (DMSO-d6, 400 MHz): δ 11.41 (s, 1H), 8.33 (d, J=5.6 Hz, 1H), 7.99 (d, J=1.6 Hz, 1H), 7.64-7.54 (m, 4H). LCMS (ESI) m/z: 345.0 [M+H+].

1. temperaturea cooled
2. stirringThe reaction was stirred at 0° C. for 4 hours
3. additionpoured onto ice-water (20 mL)
4. customThe precipitate was collected
5. extractionfiltrate was extracted by EtOAc (2×50 mL)
6. dry with materialThe combined organic extracts were dried over Na2SO4
7. concentrationconcentrated under reduced pressure