反应详情

To a suspension of 2,4-dichloro-3-fluoro-6-methoxyquinoline (0.9 g, 3.66 mmol) in ammonia in methanol (10 mL, 462 mmol) was added carefully the slurry of Raney Nickel (5 g, 3.66 mmol) in Methanol (10 mL). The resulting reaction mixture was hydrogenated at 150 psi pressure, stirred at room temperature for 24 h. Filtered the catalyst, washed with methanol, evaporated the filtrate under reduced pressure to afford crude mass, purified by silica gel chromatography eluting with 10%-50% ethyl acetate in pet-ether to afford 3-Fluoro-6-methoxy quinoline (0.27 g, 41%) as pink solid. 1H NMR (400 MHz, CDCl3): δ ppm 8.65 (d, J=2.9 Hz, 1H), 8.01-7.98 (d, J=9 Hz, 1H) 7.67-7.64 (dd, J=9 Hz, J=2.9 Hz 1H), 7.33-7.30 (dd, J=9.0 Hz, J=2.9 Hz, 1H), 7.03 (d, J=2.9 Hz 1H), 3.93 (s, 3H).

1. customThe resulting reaction mixture
2. filtrationFiltered the catalyst
3. washwashed with methanol
4. customevaporated the filtrate under reduced pressure
5. customto afford crude mass
6. custompurified by silica gel chromatography
7. washeluting with 10%-50% ethyl acetate in pet-ether