反应详情

p-Toluenesulfonylchloride (1 g) is added portionwise to a solution of 1-(2-hydroxyethyl)pyrrolidin-2-one (500 μL) and pyridine (1.5 mL) in dichloromethane (8 mL) chilled in an ice bath. The mixture is stirred at room temperature for 12 hours and partitioned between 1 M hydrochloric acid and diethylether. The organic phase is dried (MgSO4) and concentrated. The residue is chromatographed on silica gel (ethyl acetate) to give the title compound. Yield: 390 mg; Mass spectrum (ESI+): m/z=284 [M+H]+.

1. temperaturechilled in an ice bath
2. custompartitioned between 1 M hydrochloric acid and diethylether
3. dry with materialThe organic phase is dried (MgSO4)
4. concentrationconcentrated
5. customThe residue is chromatographed on silica gel (ethyl acetate)