反应详情

To a stirred mixture of trans-tert-butyl 4-amino-3-hydroxypiperidine-1-carboxylate (1.05 g, 4.86 mmol) in 80 mL of dichloromethane was added triethyl amine (5.89 g, 5.83 mmol), followed by the addition of N-(benzyloxycarbonyloxy)succinimide (1.27 g, 5.10 mmol) at 0° C. The reaction was stirred at room temperature for 16 hours and then diluted with 100 mL of dichloromethane. The solution mixture was washed with 5% citric acid solution (2×100 mL), 5% potassium carbonate solution (2×100 mL) and brine (200 mL). The organic layer was dried over anhydrous sodium sulfate and filtered, followed by concentration under reduced pressure. The resultant oily matter was purified by silica gel column chromatography (ethyl acetate: petroleum ether=1:4˜1:2) to afford the title compound (1.7 g, ˜100%, crude) as a colorless oil. MS (ES+) C18H26N2O5 requires: 350, found: 251 [M+H−100]+.

1. washThe solution mixture was washed with 5% citric acid solution (2×100 mL), 5% potassium carbonate solution (2×100 mL) and brine (200 mL)
2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
3. filtrationfiltered
4. concentrationfollowed by concentration under reduced pressure
5. customThe resultant oily matter was purified by silica gel column chromatography (ethyl acetate: petroleum ether=1:4˜1:2)