反应详情

温度

60 °C

A mixture of 0.28 g of 2-(3-aminopyridin-4-yl)-5-(trifluoromethyl)benzoxazole and 3 ml of acetic anhydride was stirred while heating at 60° C. for two hours. The reaction mixture was cooled to room temperature, and then water was added to the reaction mixture, followed by extraction with ethyl acetate twice. The combined organic layers were washed with a saturated aqueous solution of sodium hydrogencarbonate and a saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was washed with ethyl acetate to give 0.17 g of N-[4-(5-trifluoromethylbenzoxazole-2-yl)pyridin-3-yl]acetamide (hereinafter, referred to as “active compound 82”).

1. temperatureThe reaction mixture was cooled to room temperature
2. extractionfollowed by extraction with ethyl acetate twice
3. washThe combined organic layers were washed with a saturated aqueous solution of sodium hydrogencarbonate
4. dry with materiala saturated sodium chloride solution, dried over anhydrous magnesium sulfate
5. concentrationconcentrated under reduced pressure
6. washThe residue was washed with ethyl acetate