反应详情

温度

80 °C

4-(4-Chlorophenyl)-4-oxobutanoic acid (2.0 g, 9.41 mmol), methoxylamine hydrochloride (0.982 g, 11.76 mmol) and sodium carbonate (0.472 ml, 11.29 mmol) in ethanol (30 ml) were stirred and heated at 80° C. for 4 hours. The resulting mixture was allowed to cool to room temperature and filtered. The filtrate was concentrated by evaporation then purified by flash silica chromatography, eluting with 15% TBME in isohexane. Pure fractions were evaporated to dryness to afford ethyl 4-(4-chlorophenyl)-4-(methoxyimino)butanoate (1.790 g, 70.6%) as a colourless oil.

1. temperatureto cool to room temperature
2. filtrationfiltered
3. concentrationThe filtrate was concentrated by evaporation
4. customthen purified by flash silica chromatography
5. washeluting with 15% TBME in isohexane
6. customPure fractions were evaporated to dryness