反应详情

温度

70 °C

To a solution of 5-bromo-2-methyl-3-nitropyridine (2.81 g, 12.9 mmol) in TEA (25 mL) was added tert-butyl prop-2-yn-1-ylcarbamate (2.58 g, 16.6 mmol). The solution was degassed with argon. To the reaction mixture were added bis(triphenylphosphine)palladium(II)chloride (0.18 g, 0.26 mmol) and copper(I)iodide (0.098 g, 0.52 mmol). The reaction mixture was allowed to stir at 70° C. for 2.5 h and was then concentrated and diluted with EtOAc (100 mL). The mixture was filtered over a pad of Celite® and the resulting filtrate was washed with sat. aq. NaHCO3 (100 mL). The organic solution was dried over MgSO4, filtered and concentrated. The residue was purified by column chromatography to give tert-butyl[3-(6-methyl-5-nitropyridin-3-yl)prop-2-yn-1-yl]carbamate (2.98 g, 79%) as a yellow solid. LCMS (FA): Rt=1.81 min, m/z=292.0 (M+H).

1. customThe solution was degassed with argon
2. concentrationwas then concentrated
3. additiondiluted with EtOAc (100 mL)
4. filtrationThe mixture was filtered over a pad of Celite®
5. washthe resulting filtrate was washed with sat. aq. NaHCO3 (100 mL)
6. dry with materialThe organic solution was dried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue was purified by column chromatography