Methanol → HCID 58128481, compound

Participants

Reaction Conditions

Reaction Steps

1 M DiBAl—H in dichloromethane (42 mL, 2.2 eq.) was added slowly, via an addition funnel, over 20 min to a well stirred solution of the α,β-unsaturated ester from step 1 of this example (5.14 gram, 1 eq.) in anhydrous DCM (100 mL) under argon atmosphere at −78° C. The resulting solution was warmed to 0° C. after completion of addition and was kept at that temperature for 30 min. The reaction was cooled back to −78° C. and 4 mL MeOH was added slowly to quench the excess DiBAl-H. The cold solution was further stirred at −78° C. for 10 min before pouring into 150 mL saturated aqueous Rochelle (sodium potassium tartrate) salts solution. The mixture was vigorously stirred at room temperature for 3 hours until it turned clear. The organic layer was separated, dried over sodium sulfate, filtered and concentrated i. vac. The residue was further purified by column chromatography using acetone/hexanes (20%, isocratic) to give the desired product as colorless oil.

Provenance & Evidence