C(OC([NH:11][C@H:12]1[C@H:15]([O:16][C:17](=[O:19])[CH3:18])[NH:14][C:13]1=[O:20])=O)C1C=CC=CC=1.[H][H]>[Pd].C(OCC)(=O)C>[NH2:11][C@H:12]1[C@H:15]([O:16][C:17](=[O:19])[CH3:18])[NH:14][C:13]1=[O:20](3S,4S)-3-benzyloxycarbonylamino-4-acetoxy-azetidin-2-one (912 mg, 3.28 mmol) is hydrogenated with 1 g of 10% palladium on activated carbon in 35 ml of ethyl acetate at 50 psi hydrogen pressure at room temperature for 1.5 hours. After removal of catalyst by filtration, desubstitution (3S,4S)-3-amino-4-acetoxy-azetidin-2-one in ethyl acetate is obtained.
読み込み中…