反应详情

To a solution of 4-(3-ethoxycarbonyl-[1,2,4]triazol-1-yl) -piperidine-1-carboxylic acid tert-butyl ester (from Step 1, 0.64 g, 2.06 mmol) in THF (10 mL) at 0° C. was added lithium aluminum hydride (0.078 g, 2.06 mmol). The solution was allowed to warm to room temperature and stirred for 4 hours. The solution was diluted with THF, cooled to 0° C., and 1 mL of water was added followed by 1 mL of 15% NaOH and 3 mL of water. The solution was allowed to warm to room temperature and stirred for 15 minutes. MgSO4 was then added and the solution was stirred an additional 15 minutes, filtered and concentrated in vacuo. The residue was purified by flash chromatograph on silica gel with MeOH and CH2Cl2 to afford the desired product. 1H NMR (CDCl3): δ 8.03 (1H, s), 4.79 (2H, d), 4.25 (3H, m), 2.95 (2H, m), 2.58 (1H, t), 2.19 (2H, m), 1.98 (2H, m), 1.43 (9H, s).

1. temperaturecooled to 0° C.
2. temperatureto warm to room temperature
3. stirringstirred for 15 minutes
4. stirringthe solution was stirred an additional 15 minutes
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by flash chromatograph on silica gel with MeOH and CH2Cl2