反应详情

95% Sodium hydroxide (0.32 g, 7.5 mmol), acetone (5 ml) and butyl nitrite (0.62 g, 6 mmol) were added to 2-(2,5-dimethylphenoxymethyl)benzyl cyanide (1.26 g, 5 mmol). The mixture was stirred at room temperature for 2 hours. Dimethyl sulfate (0.95 g, 7.5 mmol) was added, and the mixture was stirred under ice-cooling for 10 minutes and at room temperature for 1 hour. After completion of the reaction, toluene (10 ml) and 1N aqueous sodium hydroxide solution (10 ml) were added, and the mixture was stirred at room temperature for 1 hour. After stirring, water (100 ml) was added. The mixture was extracted with ether (100 ml), dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (ethyl acetate/n-hexane) to give 2-(2,5-dimethylphenoxymethyl)-α-methoxyiminobenzyl cyanide (1.29 g, Yield: 87.6%, E/Z=13/87).

1. stirringthe mixture was stirred under ice-
2. temperaturecooling for 10 minutes and at room temperature for 1 hour
3. additionwere added
4. stirringthe mixture was stirred at room temperature for 1 hour
5. stirringAfter stirring
6. extractionThe mixture was extracted with ether (100 ml)
7. dry with materialdried over anhydrous magnesium sulfate
8. concentrationconcentrated under reduced pressure
9. customThe resulting residue was purified by silica gel chromatography (ethyl acetate/n-hexane)