反应详情

1M diisobutylaluminum hydride/toluene solution (5.5 ml, 5.5 mmol) was added dropwise to a mixture of methyl 2-(2,5-dimethylphenoxymethyl)-α-methoxyiminophenylacetate (1.64 g, 5 mmol) and dichloromethane (15 ml) at −70° C. over 0.5 hours, and then the mixture was stirred at −70° C. to room temperature for 3 hours. Methanol (3 ml) was added to the reaction mixture, and the mixture was stirred at room temperature for 1 hour. The precipitated insoluble materials were removed, and the mixture was concentrated under reduced pressure. The residue was purified by silica gel chromatography (ethyl acetate/n-hexane) to 2-(2,5-dimethylphenoxymethyl)-α-methoxyiminophenylacetaldehyde (0.54 g, 36.3%) as a colorless oil.

1. stirringthe mixture was stirred at room temperature for 1 hour
2. customThe precipitated insoluble materials were removed
3. concentrationthe mixture was concentrated under reduced pressure
4. customThe residue was purified by silica gel chromatography (ethyl acetate/n-hexane) to 2-(2,5-dimethylphenoxymethyl)-α-methoxyiminophenylacetaldehyde (0.54 g, 36.3%) as a colorless oil