反应详情

Add lithium aluminum hydride (0.225 g, 5.92 mmol) to tetrahydrofuran (15 mL) at 0° C. then slowly add 5-methyl-1-pyridin-2-yl-1H-pyrazole-4-carboxylic acid ethyl ester (0.685 g, 2.96 mmol) in tetrahydrofuran (5 mL) dropwise. Warm the mixture to room temperature and stir for 2 hr. then cool the solution to 0° C. Add saturated aqueous sodium sulfate (0.5 mL), warm to room temperature then stir for 2 hr. Filter off the solid materials then dry the solution (sodium sulfate), filter and concentrate to give (5-methyl-1-pyridin-2-yl-1H-pyrazol-4-yl)-methanol as a white solid (0.501 g, 89%).

1. temperaturethen cool the solution to 0° C
2. stirringthen stir for 2 hr
3. filtrationFilter off the solid materials
4. dry with materialthen dry the solution (sodium sulfate)
5. filtrationfilter
6. concentrationconcentrate