反应详情

温度

0 °C

3-Methylpyridine 1-oxide (2 g, 18.3 mmol, Step a) was added slowly to the round bottom flask containing sulfuric acid (7 mL, 128 mmol). The mixture was cooled to 0° C. and nitric acid (5.7 mL, 128 mmol) was added drop wise. The resulting reaction mixture was heated at 90-100° C. for 2 hours. The reaction mixture was poured onto crushed ice and sodium carbonate was added portion wise. The aqueous phase was extracted with chloroform. The combined organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated under vacuum to get 3-methyl-4-nitropyridine 1-oxide (1.4 g, 50%).

1. customThe resulting reaction mixture
2. temperaturewas heated at 90-100° C. for 2 hours
3. additionThe reaction mixture was poured
4. additionwas added portion wise
5. extractionThe aqueous phase was extracted with chloroform
6. washThe combined organic layer was washed with brine
7. dry with materialdried over anhydrous sodium sulfate
8. concentrationconcentrated under vacuum