反应详情

温度

85 °C

Potassium hydroxide (2.4 g, 43.13 mmol) was added to a solution of 4-ethyl-5-fluoro-2-methoxyphenol (6.1 g, 35.94 mmol) and 3,4-difluorobenzonitrile (5.0 g, 35.94 mmol) in anhydrous acetonitrile (80 mL). The reaction mixture was stirred at 85° C. overnight then concentrated under vacuum. The residue was solubilized in ethyl acetate (300 mL) and diluted by addition of a saturated solution of ammonium chloride (200 mL). The aqueous layer was separated and extracted with ethyl acetate (2×200 mL). The combined organic phases were dried over sodium sulfate, filtered and concentrated to dryness to give a brown solid. After trituration in pentane, the title product was obtained as a brown solid (8.10 g, 77%).

1. concentrationthen concentrated under vacuum
2. additiondiluted by addition of a saturated solution of ammonium chloride (200 mL)
3. customThe aqueous layer was separated
4. extractionextracted with ethyl acetate (2×200 mL)
5. dry with materialThe combined organic phases were dried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated to dryness
8. customto give a brown solid