反应详情

To a mixture of 6-(6-methylpyrazin-2-yl)-1H-pyrazolo[4,3-c]pyridine (1.008 mmol; 213.0 mg) in Dimethylformamide (10 mL) at 0° C. was added sodium hydride (60% in mineral oil; 1.210 mmol; 48.40 mg). The resulting mixture was stirred for 10 min. 2,6-difluoro-3-(trifluoromethyl)pyridine (1.008 mmol; 184.6 mg) was then added. The reaction was stirred and allowed to warm to room temperature and stirred for 4 hours. The mixture was quenched with water, and extracted with EtOAc. The organic layer was washed with brine, and then concentrated. The residue was purified on silica eluted with 0 to 100% EtOAc in Heptane. 1-[6-fluoro-5-(trifluoromethyl)-2-pyridyl]-6-(6-methylpyrazin-2-yl)pyrazolo[4,3-c]pyridine was obtained as the most abundant isomer (173.6 mg, 46%).

1. stirringThe reaction was stirred
2. stirringstirred for 4 hours
3. customThe mixture was quenched with water
4. extractionextracted with EtOAc
5. washThe organic layer was washed with brine
6. concentrationconcentrated
7. customThe residue was purified on silica
8. washeluted with 0 to 100% EtOAc in Heptane