反应详情

温度

80 °C

To a solution of [(3aS,5S,6aS)-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl]methyl benzoate (compound 32a, 5.1 g, 18 mmol) in MeOH (50 mL) was added H2SO4 (0.5 mL) at room temperature. After being stirred at 80° C. for 0.5 hour, the reaction mixture was cooled to room temperature, neutralized by solid NaHCO3 and concentrated in vacuo. The residue was re-dissolved in EtOAc, washed with water twice. The separated organic layer was dried over Na2SO4 and concentrated in vacuo to afford 4.1 g crude product of [(2S,4S)-4-hydroxy-5-methoxy-tetrahydrofuran-2-yl]methyl benzoate (compound 32b) as oil, which was used in next step directly. MS obsd. (ESI+) [(M+NH4)+]: 270.

1. temperaturethe reaction mixture was cooled to room temperature
2. concentrationconcentrated in vacuo
3. dissolutionThe residue was re-dissolved in EtOAc
4. washwashed with water twice
5. dry with materialThe separated organic layer was dried over Na2SO4
6. concentrationconcentrated in vacuo