反应详情

温度

105 °C

To a sealed tube was added 2,3,5-tribromopyridine (5.63 g, 17.83 mol), sodium iodide (8.02 g, 53.50 mol), propanenitrile (45 mL), and chlorotrimethylsilane (2.26 mL, 17.83 mol). The resulting mixture was allowed to stir for 50 min at 105° C. The mixture was allowed to cool to rt and 2M NaOH (50 mL) was added. The mixture was extracted with EtOAc (2×80 mL). The organic solutions were combined, dried over Na2SO4, filtered and concentrated. The residue was purified by column chromatography to give 2-iodo-3,5-dibromopyridine (5.4 g, 83%) as a solid.

1. temperatureto cool to rt
2. extractionThe mixture was extracted with EtOAc (2×80 mL)
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated
6. customThe residue was purified by column chromatography