反应详情

温度

75 °C

To a solution of 1-tert-butyl 4-ethyl 4-(methoxymethyl)piperidine-1,4-dicarboxylate from step A (732 mg, 2.63 mmol) in 1:2 ethanol/water (9 mL) was added lithium hydroxide monohydrate (700 mg). The mixture was heated to 75° C. for 1 hour. The reaction was cooled to room temperature and poured into 50 mL of sat. aq. NaHSO4. The aqueous layer was extracted with ethyl acetate (3×50 mL). The combined organic layers were washed with brine, dried over MgSO4, and concentrated under vacuum to give the title compound as a viscous yellow oil, which was carried on to the next step without further purification. MS (ES+) [M+H]+=274.2.

1. temperatureThe reaction was cooled to room temperature
2. extractionThe aqueous layer was extracted with ethyl acetate (3×50 mL)
3. washThe combined organic layers were washed with brine
4. dry with materialdried over MgSO4
5. concentrationconcentrated under vacuum