反应详情

60% NaH in oil (950 mg, 23.8 mmol) was added to isopropyl alcohol (4.1 mL) in THF (20 mL) under a nitrogen atmosphere. After stirring for 30 min, 5-fluoro-2-nitrobenzoic acid (2.0 g, 10.8 mmol) was added, and the mixture was heated at reflux for 6 h. Following addition of 2N HCl to adjust the pH to 2, the mixture was extracted, washed with brine, dried (Na2SO4) and concentrated to dryness. Purification by chromatography gave 950 mg of 5-isopropoxy-2-nitro-benzoic acid.

1. temperaturethe mixture was heated
2. temperatureat reflux for 6 h
3. extractionthe mixture was extracted
4. washwashed with brine
5. dry with materialdried (Na2SO4)
6. concentrationconcentrated to dryness
7. customPurification by chromatography