[C:1]([O:4][CH:5]1[CH:12]([O:13][C:14](=[O:16])[CH3:15])[CH:11]([O:17][C:18](=[O:20])[CH3:19])[C:10]2([CH2:22]I)[CH2:21][CH:6]1[NH:7][C:8](=[O:24])[O:9]2)(=[O:3])[CH3:2].[N-:25]=[N+:26]=[N-:27].[Na+]>CN(C)C=O>[C:1]([O:4][CH:5]1[CH:12]([O:13][C:14](=[O:16])[CH3:15])[CH:11]([O:17][C:18](=[O:20])[CH3:19])[C:10]2([CH2:22][N:25]=[N+:26]=[N-:27])[CH2:21][CH:6]1[NH:7][C:8](=[O:24])[O:9]2)(=[O:3])[CH3:2]6,7,8-Triacetoxy-1-iodomethyl-3-oxo-2-oxa-4-azabicyclo[3.3.1]nonane (as described in Example 2 of the Japanese Patent Application No. 144309/1981, pp. 39) (4.5 g) is dissolved in dimethylformamide (15 ml), and sodium azide (1.0 g) is added to the solution, followed by stirring under heating on a bath of the temperature of 130° to 140° C. for 2 hours. The reaction mixture is treated in the same manner as described under (a) of Reference Example mentioned above to produce crystalline 6,7,8-triacetoxy-1-azidomethyl-3-oxo-2-oxa-4-azabicyclo[3.3.1]nonane (3.2 g).
読み込み中…