反应详情

Potassium hydroxide (1.55 g) in water (15 mL) was added to a suspension of 4-chloro-3-(cyanomethyl)benzoic acid [WO 2006040568] (2.07 g) in ethanol (15 mL) and the resulting solution was heated at reflux for 4 hours, then allowed to cool. The mixture was concentrated under reduced pressure to remove the ethanol and then diluted with water and washed twice with ethyl acetate. The organic phases were discarded, whilst the aqueous phase was acidified to pH 1 with concentrated hydrochloric acid and extracted twice with ethyl acetate. The combined extracts were washed with brine, dried over anhydrous magnesium sulphate and concentrated under reduced pressure to afford the subtitled compound as a pale brown solid. Yield 2.06 g.

1. temperaturethe resulting solution was heated
2. temperatureat reflux for 4 hours
3. temperatureto cool
4. concentrationThe mixture was concentrated under reduced pressure
5. customto remove the ethanol
6. additiondiluted with water
7. washwashed twice with ethyl acetate
8. extractionextracted twice with ethyl acetate
9. washThe combined extracts were washed with brine
10. dry with materialdried over anhydrous magnesium sulphate
11. concentrationconcentrated under reduced pressure