反应详情

温度

100 °C

To a solution of 5-tert-butyl-2-chloro-3-nitro-pyridine (554 mg, 2.58 mmol) dissolved in 10% aqueous dioxane (5.0 mL) was added potassium carbonate (1.07 g, 7.74 mmol), trimethylboroxine (395 mL, 2.84 mmol), and lastly tetrakis-(triphenylphosphine)palladium (149 mg, 0.129 mmol). The solution was heated in a sealed tube to 100° C. for 18 h, cooled to room temperature and diluted with ether. The organic layer was washed twice with saturated aqueous NaHCO3, dried over sodium sulfate, filtered, and concentrated in vacuo. Purification by silica-gel chromatography (10% ethyl acetate in hexane) provided 5-tert-butyl-2-methyl-3-nitro-pyridine (388 mg, 75%) as colorless oil.

1. temperaturecooled to room temperature
2. washThe organic layer was washed twice with saturated aqueous NaHCO3
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customPurification by silica-gel chromatography (10% ethyl acetate in hexane)