反应详情

3-Bromo-4-[(2,4-difluorobenzyl)oxy]-6-methylpyridin-2(1H)-one (1.8 g, 0.0055 mol) and 2-chloropyrazine (0.8 g, 0.00625) were suspended in THF (25 mL), then added NaH (0.15 g, 0.0062 mol), KI (0.1 g) and the mixture was heated at 65° C. under argon atmosphere for 16 h. The reaction mixture was cooled, added acetic acid (0.5 mL) and concentrated to dryness under reduced pressure. The residue was stirred with a mixture of water (50 mL) and EtoAc (25 mL) and filtered the precipitate. It was washed with water, and acetonitrile an dried in vacuo to afford 1.7 g of light brown powder. 1H NMR (CD3OD/400 MHz) δ8.65 (d, 1H), δ 49 (m, 1H), 8.47 gm, 1H), 7.61 (˜q, 1H), 7.02 (m, 2H), 6.52 (s, 1H), 5.47 (s, 2H), 5.23 (s, 2H), and 2.53 (s, 3H);

1. temperatureThe reaction mixture was cooled
2. concentrationconcentrated to dryness under reduced pressure
3. filtrationfiltered the precipitate
4. washIt was washed with water, and acetonitrile
5. customan dried in vacuo