反应详情

温度

90 °C

A mixture of N-ethyl-4-methoxy-5-(6-methyl-5-((2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yl)oxy)pyridin-2-yl)pyrimidin-2-amine (0.29 g, 0.7 mmol) and 48% aq. HBr (0.32 mL, 2.78 mmol) in acetic acid (5 mL) was heated at 90° C. for 6 h. The mixture was cooled to RT, diluted with water (60 mL), made basic with solid NaHCO3, extracted with 1:1 EtOAc/THF (3×) and the combined organics were washed with brine, dried over Na2SO4 and concentrated to dryness. The residue was stirred with MeCN for 1 h and the resulting solid was collected via filtration to afford 2-(ethylamino)-5-(6-methyl-5-((2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yl)oxy)pyridin-2-yl)pyrimidin-4(3H)-one as white solid (210 mg, 75%). 1H NMR (400 MHz, DMSO-d6): δ 11.20 (br s, 1H), 8.67 (s, 1H), 8.35 (d, J=5.7 Hz, 1H), 8.24-8.26 (m, 2H), 7.96 (s, 1H), 7.50 (d, J=8.6 Hz, 1H), 7.21 (d, J=2.4 Hz, 1H), 6.88 (br s, 1H), 6.60 (dd, J=5.7, 2.4 Hz, 1H), 3.84 (s, 3H), 3.34-3.32 (m, 2H), 2.34 (s, 3H), 1.12 (t, J=7.2 Hz, 3H); MS (ESI) m/z: 404.2 (M+H+).

1. temperatureThe mixture was cooled to RT
2. extractionextracted with 1:1 EtOAc/THF (3×)
3. washthe combined organics were washed with brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated to dryness
6. filtrationthe resulting solid was collected via filtration