(3S,4R)-Benzyl 3-((tert-butoxycarbonyl)amino)-4-hydroxypiperidine-1-carboxylate → tert-Butyl ((3S,4R)-4-hydroxypiperidin-3-yl)carbamate
反応式
[C:1]([O:5][C:6]([NH:8][C@@H:9]1[C@H:14]([OH:15])[CH2:13][CH2:12][N:11](C(OCC2C=CC=CC=2)=O)[CH2:10]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]>C(O)C.[Pd]>[C:1]([O:5][C:6](=[O:7])[NH:8][C@@H:9]1[C@H:14]([OH:15])[CH2:13][CH2:12][NH:11][CH2:10]1)([CH3:4])([CH3:2])[CH3:3]参加物
4
実験手順
A solution of (3S,4R)-benzyl 3-((tert-butoxycarbonyl)amino)-4-hydroxypiperidine-1-carboxylate (1.94 g, 5.54 mmol) in ethanol (48 mL) was added to a hydrogenation flask containing 10% Pd/C (0.059 g, 0.554 mmol) that had been evacuated and back-filled with N2 (×3). The flask was again evacuated and then back-filled with H2 (×3). Enough H2 to allow complete reaction was then introduced to a burette and the system closed and the flask allowed to stir under a H2 atmosphere overnight. The reaction mixture was filtered through Celite and washed with EtOH (2×20 mL) and ethyl acetate (2×20 mL). The combined filtrate was concentrated in vacuo to afford the product as a cream oily solid—tert-butyl((3S,4R)-4-hydroxypiperidin-3-yl)carbamate (1.13 g, 5.22 mmol, 94% yield).