反应详情

To N-methyl-2-(2-methylphenyl)-2-oxoacetamide (5.31 g, 0.03 mol), added were methanol (30 ml) and hydroxylamine hydrochloride (4.17 g, 0.06 ml), and the reaction mixture was heated under reflux for 5 hours. After completion of the reaction, water (150 ml) was added to the reaction mixture which was then extracted with methylene chloride. The extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel chromatography (ethyl acetate/n-hexane) to give N-methyl-2-(2-methylphenyl)-2-hydroxyiminoacetamide in E-form (4.79 g; yield, 83.1%) and Z-form (0.50 g; yield, 8.7%) as colorless crystals.

1. temperaturethe reaction mixture was heated
2. temperatureunder reflux for 5 hours
3. additionwas added to the reaction mixture which
4. extractionwas then extracted with methylene chloride
5. dry with materialThe extract was dried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel chromatography (ethyl acetate/n-hexane)