反应详情

温度

4 °C

1,3-Bis(methoxymethoxy)-5-(2-methoxyethyl)benzene (5.00 g, 19.5 mmol) obtained in Example 1, Step 3 was dissolved in N,N-dimethylformamide (40 mL). After the solution was cooled to 4° C., N-bromosuccinimide (3.47 g, 19.5 mmol) was added thereto, followed by stirring for 1 hour. To the reaction mixture was added water (0.10 L), and the mixture was extracted with a mixed solvent of hexane and ethyl acetate (hexane/ethyl acetate=1/1, 0.30 L). 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 (ethyl acetate/hexane=1/9-1/2) to obtain 3,5-bis(methoxymethoxy)-2-bromo-1-(2-methoxyethyl)benzene (5.7 g, 87%).

1. extractionthe mixture was extracted with a mixed solvent of hexane and ethyl acetate (hexane/ethyl acetate=1/1, 0.30 L)
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 (ethyl acetate/hexane=1/9-1/2)