反应详情

温度

-78 °C

Methyl 3,5-diallyloxy-2-ethylphenylacetate (0.84 g, 2.9 mmol) obtained in Example 5, Step 3 was dissolved in dichloromethane (15 mL). After the solution was cooled to −78° C. in an atmosphere of nitrogen, a 1.0 mol/L solution of diisobutylaluminum hydride in toluene (8.4 mL, 8.4 mmol) was added dropwise thereto, followed by stirring at −78° C. for 4 hours. To the reaction mixture was added a saturated aqueous solution of potassium sodium tartrate (50 mL), and the mixture was stirred at room temperature for 3 hours and then extracted with ethyl acetate (0.10 L×2). The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (ethyl acetate/hexane=1/9-1/1) to obtain 2-(3,5-diallyloxy-2-ethylphenyl)ethanol (0.74 g, 97%).

1. stirringthe mixture was stirred at room temperature for 3 hours
2. extractionextracted with ethyl acetate (0.10 L×2)
3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
4. concentrationconcentrated under reduced pressure
5. customThe resulting residue was purified by silica gel column chromatography (ethyl acetate/hexane=1/9-1/1)