反应详情

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0 °C

Sodium bis(2-methoxyethoxy)aluminum hydride (65 wt % solution in toluene, 4.2 mL, 13.98 mmol) was added to a solution of 4-{1-ethyl-1-[4-(3-ethyl-3-hydroxy-1-pentynyl)-3-methyl-phenyl]-propyl}-2,6-dimethyl-phenol (Example 38-(3); 1.83 g, 4.66 mmol) in tetrahydrofuran (20 mL) in a nitrogen atmosphere at 0° C., and the mixture was stirred at 0° C. for two hours. Then, ethyl acetate and brine were added to the reaction mixture, which was further diluted with ethyl acetate. Thereafter, celite was added and the mixture was stirred at room temperature for one hour. The reaction mixture was filtered through celite, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=100:0 to 30:70, 40 minutes) to give the target compound as a colorless oil (1.55 g, 84%).

1. additionThereafter, celite was added
2. stirringthe mixture was stirred at room temperature for one hour
3. filtrationThe reaction mixture was filtered through celite
4. concentrationthe filtrate was concentrated under reduced pressure
5. customThe resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=100:0 to 30:70, 40 minutes)