反应详情

To a suspension of ethyl 5-{[3-chloro-4-[(2,4-difluorobenzyl)oxy]-6-methyl 2-oxopyridin-1(2H)-yl]methyl}pyrazine-2-carboxylate (4.0 g, 8.9 mmol) in THF:t-butanol (1:1) (10 mL) was added NaBH4 (0.46 g, 12.4 mmol). The reaction stirred at room temperature under argon overnight. The reaction mixture was quenched with acetic acid (2 mL) and the solvent was removed in vacuo. The residue was triturated with water and filtered. The solid was washed with fresh water followed by ethanol. The solid was purified by flash column chromatography (100% ethyl acetate). The appropriate fractions were combined and concentrated under reduced pressure to afford the desired compound (1.58 g, 44%) as a white solid. 1H NMR (CD3OD, 400 MHz) δ 8.59 (s, 1H), 8.56 (s, 1H), 7.52 (m, 1H), 7.01 (m, 2H), 6.55 (m, 1H), 5.45 (s, 2H), 5.29 (s, 2H), 4.71 (2H), 2.54 (s, 3H); ES-HRMS m/z 408.0940 (M+H calculated for C19H17N3O3ClF2 requires 408.0921).

1. customThe reaction mixture was quenched with acetic acid (2 mL)
2. customthe solvent was removed in vacuo
3. customThe residue was triturated with water
4. filtrationfiltered
5. washThe solid was washed with fresh water
6. customThe solid was purified by flash column chromatography (100% ethyl acetate)
7. concentrationconcentrated under reduced pressure