反应详情

TFA (30 mL) was added to a 0° C. solution of tert-butyl(1-(5-((5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octan-2-yl)-1,3,4-oxadiazol-2-yl)cyclopropyl)methylcarbamate (8 g, 0.017 mol) in DCM (100 mL). The mixture was allowed to warm to rt and was stirred at rt for 1 h. The mixture was concentrated and the residue was washed with Et2O (50 mL), and then filtrated to afford (5R)-2-(5-(1-(aminomethyl)cyclopropyl)-1,3,4-oxadiazol-2-yl)-6-(benzyloxy)-1,6-diaza-bicyclo[3.2.1]octan-7-one (7 g, 99%), which was used directly in the next step. ESI-MS (EI+, m/z): 370.2 [M+H]+.

1. concentrationThe mixture was concentrated
2. washthe residue was washed with Et2O (50 mL)
3. filtrationfiltrated