反应详情

温度

60 °C

Nitric acid (60 μL, 1.0 mmol) was added to a solution of 4-pyridin-3-yl-phenol (164 mg, 0.96 mmol) in acetic acid (2.8 mL). The mixture was heated at 60° C. for 30 min and the solution turned orange/brown in color. Upon cooling, water was added (3 mL) and 6 N NaOH (aq) was added until the solution was basic. The solution was extracted with ethyl acetate (3×) and then the aqueous phase was concentrated. The crude residue was washed with boiling methanol to afford 90 mg (43%) of 2-nitro-4-pyridin-3-yl-phenol as an orange solid: mp>300° C., MS (Cl) m/z 217.1 (M+1).

1. temperatureUpon cooling
2. additionwas added until the solution
3. extractionThe solution was extracted with ethyl acetate (3×)
4. concentrationthe aqueous phase was concentrated
5. washThe crude residue was washed with boiling methanol