反应详情

2-Chloro-3-fluoropyridin-4-ylamine (146 mg, 10 mmol) was added to a suspension of sodium hydride (60% dispersed in mineral oil, 80 mg, 2.0 mmol) in DMF (5 mL). The mixture was stirred for 30 minutes then 2,6-dichloro-4-cyano-benzoyl chloride (250 mg, 1.1 mmol) was added and stirring continued for 18 hours. Water (10 mL) and DCM (20 mL) were added to the reaction, and the resultant mixture was acidified with 1M HCl. The organic phase was separated, washed with brine (10 mL), dried over MgSO4, and concentrated to dryness under reduced pressure. The residue was purified by silica gel flash chromatography eluting with DCM. The crude product was triturated with diethyl ether to give the desired compound as a white solid (230 mg, 67% yield). 1H NMR (400 MHz, CDCl3): δ 8.46 (t, J=5.3 Hz, 1H), 8.25 (d, J=5.5 Hz, 1H), 7.88 (br s, 1H), 7.72 (s, 2H).

1. stirringstirring
2. waitcontinued for 18 hours
3. customThe organic phase was separated
4. washwashed with brine (10 mL)
5. dry with materialdried over MgSO4
6. concentrationconcentrated to dryness under reduced pressure
7. customThe residue was purified by silica gel flash chromatography
8. washeluting with DCM
9. customThe crude product was triturated with diethyl ether