反应详情

温度

0 °C

To a 20 mL scintillation vial was added 7-chloro-2-methylpyrazolo[1,5-a]pyrimidin-5-amine (1.1, 0.207 g, 1.131 mmol) and pyridine (2.84 ml, 35.1 mmol) and the solution was cooled to 0° C. To the yellow solution was added 4-(trifluoromethoxy)benzoyl chloride (0.508 g, 2.262 mmol) to give an orange suspension. The reaction mixture was stirred for one hour, quenched by the addition of saturated aqueous sodium bicarbonate, and extracted with ethyl acetate. The organic extracts were dried over sodium sulfate, filtered, and concentrated under reduced pressure in the presence of silica gel. The silica-adsorbed material was then purified by silica gel chromatography (25-75% ethyl acetate/hexanes gradient) to afford the desired compound N-(7-chloro-2-methylpyrazolo[1,5-a]pyrimidin-5-yl)-4-(trifluoromethoxy)benzamide 14A as an orange solid (215 mg, 51% yield); ESI-MS: m/z 370.0 (M+H)+.

1. customto give an orange suspension
2. customquenched by the addition of saturated aqueous sodium bicarbonate
3. extractionextracted with ethyl acetate
4. dry with materialThe organic extracts were dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure in the presence of silica gel
7. customThe silica-adsorbed material was then purified by silica gel chromatography (25-75% ethyl acetate/hexanes gradient)