反应详情

To a solution of 3-bromopyridine (4.75 gm, 30 mmol) and 3-aminopyridine (1.88 gm, 20 mmol) in dry toluene (8 mL) was added sodium t-butoxide (2.3 gm, 24 mmol), tris(dibenylideneacetone) dipalladium(0) (63 mg, 0.069 mmol), and 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (XANTPHOS) (183 mg, 0.317 mmol). The vessel was capped with a septum, degassed (3×), and heated at 100 C for ˜24 hours. The cooled reaction was diluted with methylene chloride, washed with NaHCO3 solution, water, and the organic layer dried over anhydrous sodium sulfate, filtered and the solvent concentrated to a small volume. Upon addition of diethyl ether and a few drops of methanol the product precipitated. After stirring this mixture for ˜15 hours the purified product was isolated by filtration to give 2.89 gm (84% yield) of the title compound.

1. customThe vessel was capped with a septum
2. customdegassed (3×)
3. temperatureheated at 100 C for ˜24 hours
4. customThe cooled reaction
5. washwashed with NaHCO3 solution, water
6. dry with materialthe organic layer dried over anhydrous sodium sulfate
7. filtrationfiltered
8. concentrationthe solvent concentrated to a small volume
9. additionUpon addition of diethyl ether and a few drops of methanol the product
10. customprecipitated
11. customwas isolated by filtration