反应详情

温度

-15 °C

To a mixture of trans-4-{6-[(2′-cyanobiphenyl-4-yl)methyl]-5-oxo-7-propyl[1,2,4]triazolo[1,5-a]pyrimidin-4(5H)-yl}cyclohexanecarboxylic acid (7 g), N-methylmorpholine (1.9 mL) and tetrahydrofuran (100 mL) was added ethyl chlorocarbonate (1.6 mL) at 0° C., and the mixture was stirred at the same temperature for 2 hr. The reaction mixture was cooled to −15° C., sodium borohydride (1.6 g) and methanol (25 mL) were added, and the mixture was allowed to gradually warm to room temperature. Saturated aqueous ammonium chloride solution was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography to give the title compound as a colorless solid (5.3 g, 78%).

1. temperatureto gradually warm to room temperature
2. extractionthe mixture was extracted with ethyl acetate
3. washThe ethyl acetate layer was washed with saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customThe solvent was evaporated under reduced pressure
6. customThe obtained residue was purified by silica gel column chromatography