反应详情

Add N-methylmorpholine (1.22 mL, 11.1 mmol) and isobutylchloroformate (1.44 mL, 11.1 mmol) to a solution of fusaric acid (2.0 g, 11.1 mmol) in methylene chloride at 0° C. After 15 minutes add O,N-dimethylhydroxylamine hydrochloride (1.1 g, 11.1 mmol) and N-methylmorpholine (1.22 mL, 11.1 mmol). Stir the reaction for at 0° C. 15 minutes and then room temperature for 19 hours. Dilute the reaction with methylene chloride and wash with water (1×50 mL), 10% aqueous citric acid (1×50 mL), brine (1×50 mL), saturated aqueous sodium bicarbonate (1×50 mL), and brine (1×50 mL). Dry the organic solution with sodium sulfate, filter, and concentrate in vacuo to provide the title compound 3.2 g (100%) as a clear yellow oil.

1. customthe reaction for at 0° C
2. additionDilute
3. washwash with water (1×50 mL), 10% aqueous citric acid (1×50 mL), brine (1×50 mL), saturated aqueous sodium bicarbonate (1×50 mL), and brine (1×50 mL)
4. dry with materialDry the organic solution with sodium sulfate
5. filtrationfilter
6. concentrationconcentrate in vacuo