反应详情

温度

100 °C

A mixture of 3-bromo-N-(4-cyanophenyl)-N-methylpyrazolo[1,5-a]pyridine-5-carboxamide (I-8; 400 mg, 1.10 mmol 1.0 eq), 3-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amine (I-37, 550 mg, 2.20 mmol 2.0 eq) and 1N Na2CO3 solution (4.0 mL) in 1,4-dioxane (10 mL) was degassed with argon gas for 10 min. Subsequently, tetrakis(triphenyl phosphine)-palladium(0) (250 mg, 0.22 mmol 0.2 eq) was added and the reaction mixture was stirred in a sealed tube at 100° C. for 2.5 h (cf. general Suzuki Procedure F). The solvent was removed under reduced pressure. Purification by silica gel chromatography, eluting with 5% MeOH/CH2Cl2 provided 79 as the desired product (37%). 1H NMR (400 MHz, DMSO) δ 8.58 (d, J=7.0 Hz, 1H), 8.31 (s, 1H), 7.91 (s, 1H), 7.78 (d, J=8.8 Hz, 3H), 7.53 (d, J=8.30 Hz, 2H), 7.46 (d, J=12.3 Hz, 1H), 6.74 (d, J=7.0 Hz, 1H), 6.30 (s, 2H), 3.45 (s, 3H); ESI-LC/MS (m/z): [M+H]+ 387.10, RT 1.71 min.

1. customwas degassed with argon gas for 10 min
2. customThe solvent was removed under reduced pressure
3. customPurification by silica gel chromatography
4. washeluting with 5% MeOH/CH2Cl2