反应详情

Methyl 2-acetyl-3,5-diallyloxyphenylacetate (1.1 g, 3.7 mmol) obtained in Example 5, Step 2 was dissolved in trifluoroacetic acid (5.0 mL), and triethylsilane (1.2 mL, 7.5 mmol) was added thereto, followed by stirring at room temperature for 1 hour. The reaction mixture was gradually added to a saturated aqueous solution of sodium hydrogencarbonate for neutralization, followed by extraction with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and then concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane-ethyl acetate/hexane=1/4) to obtain methyl 3,5-diallyloxy-2-ethylphenylacetate (0.66 g, 62%).

1. extractionfollowed by extraction with ethyl acetate
2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
3. concentrationconcentrated under reduced pressure
4. customThe resulting residue was purified by silica gel column chromatography (hexane-ethyl acetate/hexane=1/4)