反应详情

温度

95 °C

To a degassed mixture of 5-(5,5-dimethyl-[1,3,2]dioxaborinan-2-yl)-2-oxo-2H-[1,2′]bipyridinyl-3′-cabonitrile (from step f), 2-(7-bromo-imidazo[1,2-b][1,2,4]triazin-3-yl)propan-2-ol (from step d) (0.23 g), dry 1,4-dioxane (5 ml), and 2 M aqueous sodium carbonate (3 ml), was added tetrakis(triphenylphosphine)palladium(0) (0.12 g). The mixture was heated at 95° C. under a nitrogen atmosphere for 24 h. After cooling to 25° C., the reaction was diluted with ethyl acetate, and the organic phase separated. The solvent was evaporated at reduced pressure and the residue purified by chromatography (silica gel, 5% MeOH/CH2Cl2) to give the title compound, crystallised from hot isopropanol as a yellow solid: 1H NMR (400 MHz, DMSO-d6) δ 8.98 (1H, s), 8.97 (1H, d, J 2.0), 8.62–8.68 (2H, m), 8.40 (1H, s), 8.32 (1H, dd, J 2.7, 9.8), 7.85 (1H, dd, J 5.1, 7.8), 6.83 (1H, d, J 9.8), 5.75 (1H, s), 1.54 (6H, s); MS (ES+) m/z 374 [M+H]+.

1. temperatureAfter cooling to 25° C.
2. customthe organic phase separated
3. customThe solvent was evaporated at reduced pressure
4. customthe residue purified by chromatography (silica gel, 5% MeOH/CH2Cl2)