反应详情

温度

53 °C

A mixture of 5-{3-(cyanomethyl)-3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]azetidin-1-yl}-N-isopropylpyrazine-2-carboxamide (256 mg, 0.567 mmol, from Example 2, step 2), 4-bromo-3,5-dimethyl-1H-pyrazole (119 mg, 0.681 mmol), dicyclohexyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine-(2′-aminobiphenyl-2-yl)(chloro)palladium (1:1) (67 mg, 0.085 mmol) and cesium carbonate (550 mg, 1.7 mmol) in 1,4-dioxane (2 mL)/water (1 mL) was purged with nitrogen three times. The reaction was heated to 53° C. for 2 h. The mixture was diluted with EtOAc, washed with brine, concentrated. The resulting reside was purified first on silica gel (eluting with 0-100% EtOAc/hexanes followed by 10% methanol/dichloromethane), and then by prep-LCMS (XBridge C18 column, eluting with a gradient of acetonitrile/water containing 0.1% ammonium hydroxide, at flow rate of 60 mL/min) to give the desired product (0.1 g, 40%). 1H NMR (500 MHz, DMSO-d6) δ 8.64 (1H, d, J=1.5 Hz), 8.12 (1H, s), 8.06 (1H, d, J=8.0 Hz), 7.96 (1H, d, J=1.0 Hz), 7.71 (1H, s), 4.72 (2H, d, J=9.5 Hz), 4.49 (1H, d, J=9.5 Hz), 4.08 (1H, m), 3.68 (2H, s), 2.22 (6H, s), 1.16 (6H, d, J=6.5 Hz) ppm. LCMS calculated for C21H26N9O (M+H)+: m/z=420.2. Found: 420.0.

1. customwas purged with nitrogen three times
2. additionThe mixture was diluted with EtOAc
3. washwashed with brine
4. concentrationconcentrated
5. customThe resulting reside was purified first on silica gel (eluting with 0-100% EtOAc/hexanes followed by 10% methanol/dichloromethane)
6. washby prep-LCMS (XBridge C18 column, eluting with a gradient of acetonitrile/water containing 0.1% ammonium hydroxide, at flow rate of 60 mL/min)