反应详情

温度

60 °C

5-Chloro-2-hydroxybenzonitrile (39.25 g, 0.25 mol) and acetic anhydride (40 ml) were combined, to which 0.5 ml of concentrated sulfuric acid was added. The reaction mixture was stirred at 60° C. for 10 minutes, followed by the addition of water. Subsequent to extraction with ethyl acetate, the organic layer was washed with 1 N aqueous solution of sodium hydroxide and a saturated aquous solution of sodium chloride, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure, whereby 45 g of 2-acetoxy-5-chlorobenzonitrile were obtained as a brown solid (yield: 92%). It was provided for immediate use in the next step.

1. additionwas added
2. extractionSubsequent to extraction with ethyl acetate
3. washthe organic layer was washed with 1 N aqueous solution of sodium hydroxide
4. dry with materiala saturated aquous solution of sodium chloride, dried over anhydrous sodium sulfate
5. concentrationconcentrated under reduced pressure