反应详情

o-Nitrobenzaldehyde (7.6 g, 0.05 mole) and methyl acetoacetate (5.8 g, 0.05 mole) are dissolved in benzene (40 ml), and thereto are added piperidine (0.2 ml) and acetic acid (0.6 ml), and the mixture is refluxed for 5 hours. The produced water is removed, and when a stoichiometic amount of water is distilled off, the reaction is stopped. After completion of the reaction, the reaction mixture is washed with 5% hydrochloric acid and then with water, and the solvent is distilled off under reduced pressure to give the title compound (12.2 g, yield 98%) as a brown oil.

1. temperaturethe mixture is refluxed for 5 hours
2. customThe produced water is removed
3. distillationwhen a stoichiometic amount of water is distilled off
4. customAfter completion of the reaction
5. washthe reaction mixture is washed with 5% hydrochloric acid
6. distillationwith water, and the solvent is distilled off under reduced pressure