反应详情

温度

90 °C

Potassium carbonate (11.8 g, 85.7 mmol) and benzyl chloride (10 mL, 86.9 mmol) were added to a liquid mixture of 3-hydroxy-4-(2-methoxyethoxy)benzaldehyde described in Production Example 20-1 (12.9 g, 65.9 mmol) in ethanol (130 mL) under nitrogen atmosphere at room temperature, and the mixture was heated under reflux at 90° C. for 2 hours. The mixture was cooled to 0° C. and then 2 M hydrochloric acid, ethyl acetate, and water were added for partition. The organic layer was washed with a saturated saline solution, dried over anhydrous magnesium sulfate, and then filtered. The solvent was evaporated and the resultant residue was purified with silica gel column chromatography (n-heptane:ethyl acetate=9:1-1:1). The target fraction was concentrated under vacuum to obtain the title compound (17.6 g, 93%).

1. temperaturethe mixture was heated
2. temperatureThe mixture was cooled to 0° C.
3. customfor partition
4. washThe organic layer was washed with a saturated saline solution
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. customThe solvent was evaporated
8. customthe resultant residue was purified with silica gel column chromatography (n-heptane:ethyl acetate=9:1-1:1)
9. concentrationThe target fraction was concentrated under vacuum