反应详情

Ethyl (3S,4R)-4-[(tert-butoxycarbonyl)amino}-3-(prop-2-en-1-yloxy)piperidine-1-carboxylate (Intermediate 17, 5 g, 12.7 mmol) was dissolved in dichloromethane (200 mL) and trifluoroacetic acid (9.79 mL, 127 mmol) was added. The reaction mixture was allowed to stir for 3 h at room temperature. The reaction mixture was basified with saturated sodium bicarbonate solution (pH ˜8) and the layers were separated. The aqueous layer was extracted with dichloromethane; organic layer was dried over anhydrous sodium sulphate and concentrated under reduced pressure to afford 2.7 g (93.24%). MS (ES) (M+H): 228. for C11H20N2O3.

1. customthe layers were separated
2. extractionThe aqueous layer was extracted with dichloromethane
3. dry with materialorganic layer was dried over anhydrous sodium sulphate
4. concentrationconcentrated under reduced pressure
5. customto afford 2.7 g (93.24%)