反应详情

Preparation of 4-{[3-chloro-4-[(2,4-difluorobenzyl)oxy]-6-methyl-2-oxopyridin-1(2H)-yl]methyl}}-N,N-dimethylbenzamide. 4-{[3-chloro-4-[(2,4-difluorobenzyl)oxy]-6-methyl-2-oxopyridin-1(2H)-yl]methyl}benzoic acid (2.00 g, 4.76 mmol) was suspended in N,N-dimethylformamide (20 mL). 1-Hydroxybenzotriazole (0.773 g, 5.72 mmol) was added followed by 4-methylmorpholine (1.57 mL, 14.28 mmol), dimethylamine (7.14 mL, 2.0 M in tetrahydrofuran, 14.28 mmol) and then 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (1.28 g, 6.66 mmol). The resulting mixture was stirred at room temperature for 3 hours at which time the reaction was diluted with H2O (75 mL). The reaction mixture was then extracted with ethyl acetate. The combined organic extracts were washed with saturated NaHCO3, brine, dried over Na2SO4, filtered and concentrated. The resulting solid was washed with ethyl acetate to provide the title compound as a white solid (1.67 g, 78%). 1H NMR (400 MHz, CDCl3) δ 7.53 (app q, J=7.8 Hz, 1H), 7.33 (d, J=8.3 Hz, 2H), 7.16 (d, J=8.3 Hz, 2H), 6.95-6.90 (m, 1H), 6.84 (app dt, J=2.5, 9.4 Hz, 1H), 6.02 (s, 1H), 5.35 (s, 2H), 5.19 (s, 2H), 2.97-2.93 (br m, 6H), 2.26 (s, 3H). ES-HRMS m/z 447.1246 (M+H calcd for C23H22ClF2N2O3 requires 447.1282).

1. extractionThe reaction mixture was then extracted with ethyl acetate
2. washThe combined organic extracts were washed with saturated NaHCO3, brine
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated
6. washThe resulting solid was washed with ethyl acetate