反应详情

5.60 g of 2′-allyloxy-4′-methoxyacetophenone was dissolved in 10 ml of N,N-diethylaniline. The reaction solution was heated to reflux under nitrogen atmosphere. Approximately 6 hours later, the reaction solution was stood to cool, and then, water and ethyl acetate were added thereto, so as to separate an organic layer. The obtained organic layer was washed with 5 N hydrochloric acid and a saturated sodium chloride aqueous solution, and then dried over anhydrous magnesium sulfate. After removing the drying agent by filtration, the organic layer was concentrated under a reduced pressure, and the residue was then purified by silica gel column chromatography (hexane/ethyl acetate), so as to obtain 3.37 g of 3′-allyl-2′-hydroxy-4′-methoxyacetophenone and 1.07 g of 5′-allyl-2′-hydroxy-4′-methoxyacetophenone.

1. temperatureThe reaction solution was heated
2. temperatureto reflux under nitrogen atmosphere
3. customApproximately 6 hours
4. temperatureto cool
5. customso as to separate an organic layer
6. washThe obtained organic layer was washed with 5 N hydrochloric acid
7. dry with materiala saturated sodium chloride aqueous solution, and then dried over anhydrous magnesium sulfate
8. customAfter removing the drying agent
9. filtrationby filtration
10. concentrationthe organic layer was concentrated under a reduced pressure
11. customthe residue was then purified by silica gel column chromatography (hexane/ethyl acetate)