反应详情

温度

0 °C

To a solution of 3-methyl-1H-pyrazole (10.99 g, 134 mmol) in N,N-dimethylformamide (100 ml) at 0° C. was added sodium hydride (3.71 g, 154 mmol, 60% dispersion). The reaction was stirred at 0° C. for 2 hours. 3-Fluoropyridine (10.0 g, 103 mmol) was added, and the reaction was stirred at 100° C. overnight. The reaction was cooled to room temperature and water was added slowly. The mixture was extracted with dichloromethane and the combined organic phases were washed with brine, concentrated and chromatographed (0-100% ethyl acetate/hexanes) to afford 3-(3-methyl-1H-pyrazol-1-yl)pyridine (8.4 g, 52.77 mmol, 51.2%) and 3-(5-methyl-1H-pyrazol-1-yl)pyridine (1.0 g, 6%). Analytical data of both products is consistent with that reported under Example 6, Step 1.

1. stirringthe reaction was stirred at 100° C. overnight
2. temperatureThe reaction was cooled to room temperature
3. extractionThe mixture was extracted with dichloromethane
4. washthe combined organic phases were washed with brine
5. concentrationconcentrated
6. customchromatographed (0-100% ethyl acetate/hexanes)