反应详情

To a solution of 1.1 g of 2-(1-naphthylmethyl)malonic acid diethyl ester in 20 ml of dry 1,2-dimethoxyethane was added 0.22 g of a 50% sodium hydride (suspension in oil) under cooling, the mixture was stirred for 1 hour. To the reaction mixture was added 1.0 g of 4,4-ethylenedioxy-4-phenylbutyl bromide obtained, the mixture was heated under reflux for 17 hours. After cooling, water was added to the reaction mixture, and the mixture was extracted with diethyl ether. The ethereal layer was washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel flash column chromatography (eluent: benzene/hexane=1/1 by volume) to obtain 1.2 g of 2-(4,4-ethylenedioxy-4-phenylbutyl)-2-(1-naphthylmethyl)malonic acid diethyl ester.

1. temperatureunder cooling
2. customobtained
3. temperaturethe mixture was heated
4. temperatureunder reflux for 17 hours
5. temperatureAfter cooling
6. extractionthe mixture was extracted with diethyl ether
7. washThe ethereal layer was washed with a saturated sodium chloride aqueous solution
8. dry with materialdried over anhydrous magnesium sulfate
9. concentrationconcentrated under reduced pressure
10. customThe residue was purified by silica gel flash column chromatography (eluent: benzene/hexane=1/1 by volume)