反应详情

1,3-Dimethyl-1H-indol-2-aldehyde oxime derivative (356 mg, 2.07 mmol) was dissolved in dichloromethane (20 ml), and the mixture was kept at 0□. Ethyl 2-ethylacrylate (345 mg, 1.3 Eq) and triethylamine (6 drops) were dissolved in dichloromethane (5 ml), thus obtained solution was slowly added to the above, and sodium hypochlorite solution (5.5 ml) was further added. The reaction solution was warmed to room temperature and stirred for 4 hours. Water (20 ml) was added, and the mixture was extracted with dichloromethane (40 ml×2), washed with aqueous sodium chloride solution (20 ml), dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by column chromatography (15% ethyl acetate-hexane) to give the title compound (230 mg, Yield 35%).

1. additionwas further added
2. extractionthe mixture was extracted with dichloromethane (40 ml×2)
3. washwashed with aqueous sodium chloride solution (20 ml)
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by column chromatography (15% ethyl acetate-hexane)