反应详情

Add triethylamine (6.6 mL, 47.7 mmol) and sulfurtrioxide-pyridine complex (3.8 g, 23.9 mmol) to an ice cold solution of 4-(R)-fluoro-2-(R)-hydroxymethylpyrrolidine-1-carboxylic acid tert-butyl ester (2.62 g, 11.9 mmol) in DMSO (12 mL). Stir 30 min, then warm to room temperature and stir 30 min. Dilute with diethyl ether and wash with 5% aqueous citric acid (3×120 mL), saturated aqueous sodium chloride, dry (magnesium sulfate) and concentrate to give the title compound as an oil that is used in the next step without further purification.

1. stirringstir 30 min
2. washwash with 5% aqueous citric acid (3×120 mL), saturated aqueous sodium chloride
3. dry with materialdry (magnesium sulfate)
4. concentrationconcentrate