Sodium Azide → HCID 86607259、化合物
反応式
[CH3:1][O:2][C:3]([C@@H:5]1[CH2:10][CH2:9][C@H:8](Br)[C@H:7]([OH:12])[CH2:6]1)=[O:4].[N-:13]=[N+:14]=[N-:15].[Na+]>CN(C=O)C>[CH3:1][O:2][C:3]([C@@H:5]1[CH2:10][CH2:9][C@@H:8]([N:13]=[N+:14]=[N-:15])[C@H:7]([OH:12])[CH2:6]1)=[O:4]参加物
4
反応条件
- 温度
- 60 °C
実験手順
A solution of bromide (a) (52.4 g, 221 mmol) in DMF (1.2 liters) was treated with sodium azide (21.5 g, 331 mmol) and heated at 60° C. for 8 hours. The mixture was stirred at room temperature overnight and then evaporated. The residue was extracted with warm iso-propanol (2×300 ml). Evaporation afforded an oil which was chromatographed on silica eluting with a gradient of ethyl acetate in petroleum ether affording an oil (31 g) which was a 2:1 mixture of desired (1R,3R,4R)-4-azido-3-hydroxy-cyclohexanecarboxylic acid methyl ester to (R)-3-oxo-cyclohexanecarboxylic acid methyl ester. Further chromatography on silica eluting with a methanol/dichloromethane gradient afforded the desired intermediate as an oil (18.4 g, 42%)