反应详情

4-Hydroxymethyl-2,6-dimethylpyridine (24.7 g, 180 mmol, 1.0 equiv.) was dissolved in DMSO (200 mL), and IBX (53.0 g, 189 mmol, 1.05 equiv.) was added in portions, the mixture was stirred at room temperature for 2 hours; TLC indicated complete reaction. The mixture was filtered, washed with water and ether. The filtrate was extracted with ether (4×150 mL); the combined extracts were washed with water and brine, dried over anhydrous sodium sulfate, and concentrated to give the crude product, which was purified by column chromatography (20% ether in hexanes as eluent) to give 2,6-dimethyl-4-pyridinecarboxaldehyde as a yellow oil. Yield: 20.0 g (82%).

1. additionIBX (53.0 g, 189 mmol, 1.05 equiv.) was added in portions
2. customreaction
3. filtrationThe mixture was filtered
4. washwashed with water and ether
5. extractionThe filtrate was extracted with ether (4×150 mL)
6. washthe combined extracts were washed with water and brine
7. dry with materialdried over anhydrous sodium sulfate
8. concentrationconcentrated
9. customto give the crude product, which
10. customwas purified by column chromatography (20% ether in hexanes as eluent)