反应详情

温度

60 °C

To a stirred solution of 5-iodo-1-(1-(3-methoxy-4-((6-methoxypyridin-3-yl)methoxy)phenyl)ethyl)-1H-benzo[d]imidazol-2-amine (Example 3-45-6) (0.195 g, 0.37 mmol), 4-fluorophenylboronic acid (0.064 g, 0.46 mmol), and potassium phosphate tribasic (0.413 g, 1.91 mmol) in tetrahydrofuran (5 mL)/water (4 mL) was added 2nd generation XPhos precatalyst (0.015 g, 0.018 mmol). The yellow solution was degassed under vacuum/backfilled with nitrogen (×3). The mixture was heated to 60° C. After 90 min, the mixture was treated with an additional portion of boronic acid (0.030 g) and precatalyst (0.014 g), and the temperature was increased to 75° C. After a total reaction time of 150 min, the brown mixture was allowed to cool to room temperature and was diluted with water (30 mL). The mixture was extracted with dichloromethane (3×25 mL). The combined organic phases were dried over magnesium sulfate, filtered, and concentrated to provide 0.282 g of a brown oil. Chromatographic purification (CombiFlash, 12 g SiO2 gold column, 1-5% 2M ammonia in methanol/dichloromethane elute) afforded 0.142 g (78%) of the product as a yellow solid: 1H NMR (400 MHz, CDCl3) δ 8.20 (dd, J=2.4, 0.8 Hz, 1H), 7.68 (dd, J=8.4, 2.5 Hz, 1H), 7.62-7.52 (m, 3H), 7.23 (dd, J=8.4, 1.7 Hz, 1H), 7.17-7.06 (m, 3H), 6.96-6.88 (m, 2H), 6.81-6.79 (m, 1H), 6.78-6.74 (m, 1H), 5.58 (q, J=7.0 Hz, 1H), 5.05 (s, 2H), 4.49 (s, 2H), 3.93 (s, 3H), 3.76 (s, 3H), 1.88 (d, J=7.0 Hz, 3H) ppm; (M+1)=499.

1. customThe yellow solution was degassed under vacuum/backfilled with nitrogen (×3)
2. additionthe mixture was treated with an additional portion of boronic acid (0.030 g) and precatalyst (0.014 g)
3. temperaturethe temperature was increased to 75° C
4. customAfter a total reaction time of 150 min
5. temperatureto cool to room temperature
6. additionwas diluted with water (30 mL)
7. extractionThe mixture was extracted with dichloromethane (3×25 mL)
8. dry with materialThe combined organic phases were dried over magnesium sulfate
9. filtrationfiltered
10. concentrationconcentrated