Cl.O1CCOCC1.[CH2:8]([O:15][C:16]([NH:18][C@H:19]1[C@@H:24]([F:25])[CH2:23][CH2:22][N:21](C(OC(C)(C)C)=O)[CH2:20]1)=[O:17])[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1>C(Cl)Cl>[CH2:8]([O:15][C:16](=[O:17])[NH:18][C@H:19]1[C@@H:24]([F:25])[CH2:23][CH2:22][NH:21][CH2:20]1)[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=14N HCl in dioxane (3.29 mL, 13.2 mmol) was added to a solution of cis-tert-butyl 3-(benzyloxycarbonylamino)-4-fluoropiperidine-1-carboxylate (0.58 g, 1.65 mmol) in DCM (3 mL) at room temperature. The reaction mixture was stirred at room temperature for 2 hours. The solvent was removed in vacuo. The resulting solid was dissolved in water (5 mL) and extracted with ether (10 mL). The resulting aqueous layer was basified with 30% potassium carbonate to a pH of about 10 and extracted with DCM (2×30 mL). The combined organic layer was dried (sodium sulfate) and concentrated in vacuo to give benzyl-cis-4-fluoropiperidin-3-ylcarbamate (0.39 g, 94%) as a solid.
Wird geladen…
