C(OC([N:8]1[CH:13]2[CH2:14][CH2:15][CH:9]1[CH2:10][N:11]([C:16](=[O:18])[CH3:17])[CH2:12]2)=O)(C)(C)C.[ClH:19].O1CCOCC1>C(Cl)Cl>[ClH:19].[CH:13]12[NH:8][CH:9]([CH2:15][CH2:14]1)[CH2:10][N:11]([C:16](=[O:18])[CH3:17])[CH2:12]2To a solution of 3-acetyl-3,8-diaza-bicyclo[3.2.1]octane-8-carboxylic acid tert-butyl ester (1.20 g, 4.49 mmol) in DCM (25 mL) is added 4M HCl in 1,4-dioxane (20.0 mL, 80.0 mmol) and the reaction stirred at about 25° C. for 18 hours. The reaction is concentrated, suspended in Et2O, and filtered to afford the title compound (U) as a hydroscopic solid.
Wird geladen…