反应详情

5-Amino-3-methylisoxazole (1 g) purchased from Aldrich Co. was dissolved in tetrahydrofuran (40 ml) and pyridine (1.5 ml), and after cooling to 0° C. under a nitrogen atmosphere, phenyl chlorocarbonate (1.4 ml) was added and the mixture was stirred at room temperature for 1.5 hours. Water was added, extraction was performed twice with ethyl acetate, and then the organic layers were combined, washed with water and saturated brine in that order, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The obtained residue was recrystallized from ethyl acetate and n-hexane to obtain the title compound (450 mg, 20% yield).

1. extractionextraction
2. washwashed with water and saturated brine in that order
3. dry with materialdried over anhydrous sodium sulfate
4. concentrationconcentrated under reduced pressure
5. customThe obtained residue was recrystallized from ethyl acetate and n-hexane