反应详情

温度

-20 °C

To a solution of (3aS,5S,6aS)-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxole-5-carbaldehyde (compound 25f, 800 mg, 1 mmol) in THF (20 mL) was added methyl magnesium bromide (2M in THF, 0.7 mL, 1.4 mmol) at −20° C. under argon. After being stirred at −20° C. for 20 hours, the reaction was quenched by saturated NH4Cl solution, extracted with EtOAc (30 mL) three times. The organic layers were combined and concentrated in vacuo to afford 400 mg crude product of 1-[(3aS,5S,6aS)-2,2-dimethyl-3a,5,6,6a-tetrahydro furo[2,3-d][1,3]dioxol-5-yl]ethanol (compound 25g), which was used in next step without further purification. MS obsd. (ESI+) [(M+NH4)+]: 206.

1. customthe reaction was quenched by saturated NH4Cl solution
2. extractionextracted with EtOAc (30 mL) three times
3. concentrationconcentrated in vacuo