反应详情

Compound 1 (172 mg, 0.429 mmol) obtained in Example 1 was dissolved in ethanol (4.0 mL), and hydroxyamine hydrochloride (89.5 mg, 1.29 mmol) and triethylamine (178 μL, 1.29 mmol) were added thereto at room temperature, followed by stirring for 20 minutes. A saturated aqueous ammonium chloride solution was added to the reaction mixture, followed by extraction with ethyl acetate twice. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to yield a residue. The residue was purified by silica gel column chromatography to obtain the title compound (160 mg, 90%) as a mixture of E-form and Z-form.

1. customat room temperature
2. extractionfollowed by extraction with ethyl acetate twice
3. washThe organic layer was washed with saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated under reduced pressure
6. customto yield a residue
7. customThe residue was purified by silica gel column chromatography