反应详情

A mixture of 2-chloro-3-fluoropyridin-4-ylamine (660 mg, 4.5 mmol), 2,6-dichlorobenzoyl chloride (1.43 mL, 2.10 g, 10.0 mmol) and triethylamine (1.53 mL, 1.11 g, 11.0 mmol) in dioxane (12 mL) was heated under reflux for 18 hours then cooled to ambient temperature. The resultant mixture was partitioned between EtOAc (50 mL) and water (50 mL). The organic layer was separated, washed with brine, dried over Na2SO4 and concentrated under reduced pressure. The residue was triturated with diethyl ether, filtered, dried and further purified by silica gel flash chromatography (0-25% EtOAc in pentane) to afford the title compound as a pink solid (1.17 g, 81% yield). 1H NMR (300 MHz, CDCl3): δ 8.50 (t, J=5.3 Hz, 1H), 8.22 (d, J=5.5 Hz, 1H), 7.83 (br s, 1H), 7.40-7.39 (m, 3H).

1. temperaturewas heated
2. temperatureunder reflux for 18 hours
3. customThe resultant mixture was partitioned between EtOAc (50 mL) and water (50 mL)
4. customThe organic layer was separated
5. washwashed with brine
6. dry with materialdried over Na2SO4
7. concentrationconcentrated under reduced pressure
8. customThe residue was triturated with diethyl ether
9. filtrationfiltered
10. customdried
11. customfurther purified by silica gel flash chromatography (0-25% EtOAc in pentane)