反应详情

3.00 g of 4-nitrophenylacetone in 50 ml of dimethylformamide was mixed with 0.70 g of 60% oily sodium hydride under cooling with ice under stirring and stirred at the same temperature for 10 minutes. After addition of 3.40 g of ethyl 5-(chloromethyl)-2-furancarboxylate in 5 ml of dimethylformamide, the reaction solution was stirred at room temperature for 2.5 hours. The reaction solution was acidified with acetic acid, and water and ethyl ether were added for extraction. The organic layer was washed with saturated aqueous sodium chloride and then dried over anhydrous magnesium sulfate. The desiccant was filtered off, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography [hexane/ethyl acetate=5/1→2/1] to give 5.84 g of the title compound as a yellow oily substance.

1. temperatureunder cooling with ice
2. stirringstirred at the same temperature for 10 minutes
3. stirringthe reaction solution was stirred at room temperature for 2.5 hours
4. additionwere added for extraction
5. washThe organic layer was washed with saturated aqueous sodium chloride
6. dry with materialdried over anhydrous magnesium sulfate
7. filtrationThe desiccant was filtered off
8. distillationthe solvent was distilled off under reduced pressure
9. customThe residue was purified by silica gel column chromatography [hexane/ethyl acetate=5/1→2/1]