反应详情

温度

70 °C

N-(2-(2,5-Difluorophenyl)-5-methylpyridin-4-yl)-1-(4-methoxybenzyl)-1H-pyrazolo[4,3-b]pyridin-7-amine and N-(2-(2,5-difluorophenyl)-5-methylpyridin-4-yl)-2-(4-methoxybenzyl)-2H-pyrazolo[4,3-b]pyridin-7-amine and trifluoroacetic acid (35 mL) were combined and heated at 70° C. for 3 hours, then cooled to room temperature and stirred overnight. The reaction mixture was then concentrated in vacuo to give a residue which was dissolved in dichloromethane (75 mL) and was poured into a saturated solution of sodium bicarbonate (50 mL) to give a solid which was collected by filtration and dissolved in ethyl acetate (500 mL), washed with brine (50 mL), dried over magnesium sulfate, filtered and concentrated to give N-(2-(2,5-difluorophenyl)-5-methylpyridin-4-yl)-1H-pyrazolo[4,3-b]pyridin-7-amine. 1H NMR (400 MHz, DMSO-d6) δ ppm 2.37 (3H, s) 7.09 (1H, d, J=4.80 Hz) 7.26-7.36 (2H, m) 7.50 (1H, s) 7.75 (1H, ddd, J=9.54, 6.13, 3.28 Hz) 8.24 (1H, d, J=1.26 Hz) 8.35 (1H, d, J=5.05 Hz) 8.43 (1H, s) 8.50 (1H, s) 13.03 (1H, s). MS [M+H] found 337.3.

1. temperaturecooled to room temperature
2. concentrationThe reaction mixture was then concentrated in vacuo
3. customto give a residue which
4. customto give a solid which
5. filtrationwas collected by filtration
6. dissolutiondissolved in ethyl acetate (500 mL)
7. washwashed with brine (50 mL)
8. dry with materialdried over magnesium sulfate
9. filtrationfiltered
10. concentrationconcentrated