反应详情

温度

-78 °C

Ester 55 (40 mg) was dissolved in DCM (6 mL) under an atmosphere of argon. The reaction was cooled to −78° C. To the resultant solution DIBAL (0.46 mL) was added dropwise. This was stirred for 2 h before being allowed to warm to rt overnight. The reaction mixture was partitioned between EtOAc and 1M hydrochloric acid. The aqueous phase was extracted again with EtOAc and the combined organic extracts were dried (MgSO4), filtered and concentrated in vacuo. Purification was achieved using flash chromatography, eluting with a gradient of 1/1 EtOAc/(50/70) petroleum ether to EtOAc to yield a light brown solid, 7 mg, 19%. Rf=0.25 (1/1 EtOAc/(50/70) petroleum ether).

1. temperatureto warm to rt overnight
2. customThe reaction mixture was partitioned between EtOAc and 1M hydrochloric acid
3. extractionThe aqueous phase was extracted again with EtOAc
4. dry with materialthe combined organic extracts were dried (MgSO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customPurification
8. washeluting with a gradient of 1/1 EtOAc/(50/70) petroleum ether to EtOAc
9. customto yield a light brown solid, 7 mg, 19%