反应详情

Sodium ethoxide (1.5 g, 63 mmol sodium, in ethanol (30 ml)) was added to 2,6-dibromopyridine (15 g, 63 mmol) in toluene (150 ml) at ambient temperature under nitrogen, and the reaction heated under reflux for 5 hours. The cooled mixture was diluted with water (100 ml), and extracted with ethyl acetate (2×100 ml). The combined organic extracts were dried (Na2SO4), filtered and evaporated in vacuo. The residue was purified by column chromatography on silica gel using pentane/ethyl acetate (100:0 to 95:5) as eluant to give the title compound as a yellow oil, (quantitative).

1. temperaturethe reaction heated
2. temperatureunder reflux for 5 hours
3. extractionextracted with ethyl acetate (2×100 ml)
4. dry with materialThe combined organic extracts were dried (Na2SO4)
5. filtrationfiltered
6. customevaporated in vacuo
7. customThe residue was purified by column chromatography on silica gel