反应详情

Triphenylphosphine (421 mg) was added to a solution of tert-butyl (2S,4R)-4-azido-2-[(benzyloxy)methyl]pyrrolidine-1-carboxylate (455 mg) [see Preparation 33] in dry tetrahydrofuran (10 ml). The reaction mixture was then stirred until the evolution of nitrogen gas had ceased, water (0.036 ml) was added, the mixture was then stirred for a further 72 hours. The solvent was then removed under reduced pressure and the residue was dissolved in diethyl ether and hexane added until the mixture became cloudy. The supernatant liquid was separated and the solvent removed under reduced pressure. The crude product was purified by column chromatography on silica gel eluting with a solvent system of 90:10, by volume, dichloromethane : methanol to afford tert-butyl (2S,4R)-4-amino-2-[(benzyloxy)methyl]pyrrolidine-1-carboxylate (225 mg) as a colourless oil.

1. stirringthe mixture was then stirred for a further 72 hours
2. customThe solvent was then removed under reduced pressure
3. dissolutionthe residue was dissolved in diethyl ether
4. additionhexane added until the mixture
5. customThe supernatant liquid was separated
6. customthe solvent removed under reduced pressure
7. customThe crude product was purified by column chromatography on silica gel eluting with a solvent system of 90:10, by volume, dichloromethane