反应详情

(S)-(+)-3-Hydroxy-tetrahydrofuran (0.88 mL, 13 mmol) was dissolved in DCM (5 mL) and H2O (40 mL), carbonic acid bis-(4-nitro-phenyl) ester (5.8 g 19 mmol) and TEA (2.8 mL, 20 mmol) were added slowly. The reaction was allowed to stir at room temperature for 24 h. After concentrated, diluted with EtOAc, washed with brine and H2O, dried over Na2SO4, the crude product was purified on silica (12 g, 25-75% EtOAc/hexanes) to give carbonic acid 4-nitro-phenyl ester tetrahydro-furan-3-yl ester as light yellow solid (2.3 g, 71%).

1. concentrationAfter concentrated
2. additiondiluted with EtOAc
3. washwashed with brine and H2O
4. dry with materialdried over Na2SO4
5. customthe crude product was purified on silica (12 g, 25-75% EtOAc/hexanes)