反应详情

温度

70 °C

To a suspension of 2-(2,6-dimethylpyridin-4-yl)-7-fluoro-5-(2-methoxyethoxy)-3H-quinazolin-4-one (0.42 g, 1.22 mmol) in DMF (10 mL) was added a solution of sodium methoxide in methanol (25 wt %, 2.8 g, 12.8 mmol) and the reaction mixture was stirred at 70° C. for 16 hours, then cooled to room temperature. Water (1 mL) was added, the mixture was neutralized to pH approximately 6 with acetic acid, diluted with water (50 mL), and extracted with ethyl acetate. The combined extracts were washed with water and brine, dried over anhydrous sodium sulfate, and concentrated in vacuo, to give 0.30 g of crude compound. Further purification by crystallization in acetone:Et2O (1:3) gave the title compound as a white solid. Yield: 91 mg (15%). 1H NMR (400 MHz, CDCl3): δ 10.08 (br s, 1H), 7.60 (br s, 2H), 6.87 (d, J=1.95 Hz, 2H), 6.55 (d, J=1.95 Hz, 2H), 4.25 (t, J=4.88 Hz, 2H), 3.93 (s, 3H), 3.83 (d, J=4.29 Hz, 2H), 3.44 (s, 3H), 2.64 (s, 6H). MS (ES+) m/z: 356.11 (M+1)+

1. temperaturecooled to room temperature
2. extractionextracted with ethyl acetate
3. washThe combined extracts were washed with water and brine
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationconcentrated in vacuo
6. customto give 0.30 g of crude compound
7. customFurther purification
8. customby crystallization in acetone:Et2O (1:3)