反应详情

温度

85 °C

To a mixture of methyl 5-bromo-2-{[3-tert-butyl-1-(2-methylphenyl)-1H-pyrazol-5-yl]amino}benzoate (Example 234, 1.15 g, 4.13 mmol), ethylboronic acid (1.16 g, 15.7 mmol), and Pd(dppf)Cl2.CH2Cl2 (114 mg, 0.16 mmol) was added toluene (20 mL) and dioxane (5 mL). The resulting solution was degassed under nitrogen for 30 min, followed by addition of sodium bicarbonate (2 M aq solution, 15 mL). The mixture was then heated to 85° C. for 16 h. The reaction mixture was allowed to cool to rt. The solvent was removed under reduced pressure, and the residue was purified by silica gel flash chromatography using 0 to 10% ethyl acetate in hexanes to afford 606 mg (61%) of the title compound. 1H NMR (300 MHz, CD2Cl2) δ 9.17 (s, 1H), 7.68 (s, 1H), 7.22-7.33 (m, 6H), 6.08 (s, 1H), 3.70 (s, 3H), 2.51 (q, 2H), 2.05 (s, 3H), 1.30 (s, 9H), 1.14 (t, 3H). ES-MS m/z 392.2 (MH+); HPLC RT (min) 4.62.

1. customThe resulting solution was degassed under nitrogen for 30 min
2. additionfollowed by addition of sodium bicarbonate (2 M aq solution, 15 mL)
3. temperatureto cool to rt
4. customThe solvent was removed under reduced pressure
5. customthe residue was purified by silica gel flash chromatography