反应详情

温度

70 °C

Benzoyl chloride (4.4 g, 31 mmol) and 4-dimethylaminopyridine (0.57 g, 4.7 mmol) were added to a solution of 2-(2-amino-4-pyridyl)-1-(4-methoxyphenyl)ethanone (3.8 g, 16 mmol) in N,N-dimethylacetamide (80 mL) and the mixture was stirred at 70° C. for 12 hours. After the reaction mixture was cooled to room temperature, water (50 mL) was added. The mixture was extracted with ethyl acetate and the organic layer was washed with a saturated aqueous solution of sodium chloride. The layer was dried over magnesium sulfate, filtered and concentrated. The residue was dissolved in tetrahydrofuran (80 mL) and methanol (20 mL) and 1N-aqueous solution of sodium hydroxide (50 mL) was added. The mixture was stirred at room temperature for 3 hours. The reaction mixture was concentrated and water (100 mL) was added. The mixture was extracted with ethyl acetate and the organic layer was washed with a saturated aqueous solution of sodium chloride. The layer was dried over magnesium sulfate, filtered and concentrated. The residue was recrystallized from ethyl acetate-hexane to obtain 3.1 g of the title compound (8.9 mmol, yield 57%).

1. temperatureAfter the reaction mixture was cooled to room temperature
2. extractionThe mixture was extracted with ethyl acetate
3. washthe organic layer was washed with a saturated aqueous solution of sodium chloride
4. dry with materialThe layer was dried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. dissolutionThe residue was dissolved in tetrahydrofuran (80 mL)
8. additionmethanol (20 mL) and 1N-aqueous solution of sodium hydroxide (50 mL) was added
9. stirringThe mixture was stirred at room temperature for 3 hours
10. concentrationThe reaction mixture was concentrated
11. additionwater (100 mL) was added
12. extractionThe mixture was extracted with ethyl acetate
13. washthe organic layer was washed with a saturated aqueous solution of sodium chloride
14. dry with materialThe layer was dried over magnesium sulfate
15. filtrationfiltered
16. concentrationconcentrated
17. customThe residue was recrystallized from ethyl acetate-hexane