反应详情

温度

80 °C

Sodium azide (0.32 g) was added to a solution of tert-Butyl (2S,4S)-2-[(benzyloxy)methyl]-4-[(4-methylphenyl)sulfonyl]oxypyrrolidine-1-carboxylate (1.15 g) [see Preparation 32] in ethanol (20 ml) and dimethylformamide (5 ml). The reaction mixture was heated to 80° C. for 4 hours, after which time the cooled mixture was partitioned between diethyl ether and water. The organic layer was separated and the aqueous extracted twice with diethyl ether, the combined organic layers were dried over magnesium sulphate and the solvent removed under reduced pressure. The residue was azeotroped with dichloromethane to afford tert-butyl (2S,4R)-4-azido-2-[(benzyloxy)methyl]pyrrolidine-1-carboxylate (820 mg) as an oil.

1. customafter which time the cooled mixture was partitioned between diethyl ether and water
2. customThe organic layer was separated
3. extractionthe aqueous extracted twice with diethyl ether
4. dry with materialthe combined organic layers were dried over magnesium sulphate
5. customthe solvent removed under reduced pressure
6. customThe residue was azeotroped with dichloromethane