Sodium Carbonate → 4-(3-Trifluoromethylimidazo[1,2-b][1,2,4]triazin-7-yl)-[2,4']bipyridinyl

関与物質

反応条件

反応手順

A mixture of 7-(2-chloropyridin-4-yl)-3-trifluoromethylimidazo[1,2-b][1,2,4]triazine (0.10 g, 0.33 mmol) (prepared as described in Example 1), pyridine-4-boronic acid (50 mg, 0.40 mmol) and sodium carbonate (600 μl of a 2 M solution) in 1,4-dioxane (3 ml) was degassed by bubbling nitrogen through for 20 min. Tetrakis(triphenylphosphine)palladium(0) (50 mg, 0.04 mmol) was added and the mixture heated at 90° C. for 4 h. Solvent was removed in vacuo from the mixture and the residue partitioned between dichloromethane (50 ml) and water (30 ml). The organic layer was washed with saturated brine then dried (MgSO4), filtered and evaporated in vacuo. Purification by chromatography (silica gel, 5% MeOH/CH2Cl2) gave 28 mg of the title compound as a yellow solid: 1H NMR (400 MHz, CDCl3) δ 7.98–7.99 (2H, m), 8.06 (1H, dd, J 1.6, 5.1), 8.59 (1H, s), 8.79–8.84 (3H, m), 8.94 (1H, dd, J 0.8, 4.3), 8.95 (1H, s); MS (ES+) m/z 343 [M+H]+.

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