反应详情

温度

-20 °C

To a solution of (3aR,5S,6aR)-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxole-5-carbaldehyde (compound 1d, 296 mg, 2 mmol) in THF (20 mL) was added ethyl magnesium bromide (2M in THF, 2 mL, 2 mmol) at −20° C. under argon. After being stirred at −20° C. for 20 hours, the reaction was quenched by saturated NH4Cl solution and extracted with EtOAc (30 mL) three times. The combined organic layers were concentrated in vacuo to afford the crude product of 1-[(3aR,5S,6aR)-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl]propan-1-ol (compound 1e), which was used in next step without further purification. MS obsd. (ESI+) [(M+NH4)+]: 316.

1. customthe reaction was quenched by saturated NH4Cl solution
2. extractionextracted with EtOAc (30 mL) three times
3. concentrationThe combined organic layers were concentrated in vacuo