反应详情

A mixture of 3-[3-(5,5-dimethyl-[1,3,2]dioxaborinan-2-yl)phenyl]-1-methyl-1H-pyrazole (from above), 7-bromo-3-trifluoromethylimidazo[1,2-b][1,2,4]triazine (300 mg, 1.1 mmol) and sodium carbonate (1.7 ml of a 2 N solution, 3.4 ml) in THF (7 ml) was degassed with nitrogen for 15 min. After this time tetrakis(triphenylphosphine)palladium(0) (130 mg, 0.11 mmol) was added and the mixture heated at reflux for 18 h. The solvent was evaporated in vacuo and the residue partitioned between ethyl acetate (30 ml) and 1 N NaOH (2×30 ml). The organic phase was separated and washed with brine (30 ml), dried (MgSO4) and evaporated. The residue was chromatographed (silica gel, 2.5% MeOH/CH2Cl2) and the fractions containing the desired product were combined and evaporated. The residue was triturated with diethyl ether twice to afford the title compound (140 mg, 36%) as a colourless solid: 1H NMR (400 MHz, CDCl3) δ 3.99 (3H, s), 6.62 (1H, d, J 2.2 Hz), 7.43 (1H, d, J 2.2 Hz), 7.58 (1H, t, J 7.8 Hz), 7.89 (1H, dd, J 7.8, 1.2 Hz), 8.03 (1H, d, J 7.9 Hz), 8.51 (1H, t, J 1.5 Hz), 8.68 (1H, s), 8.80 (1H, s); MS (ES+) m/z 345 [M+H]+.

1. customwas degassed with nitrogen for 15 min
2. temperaturethe mixture heated
3. temperatureat reflux for 18 h
4. customThe solvent was evaporated in vacuo
5. customthe residue partitioned between ethyl acetate (30 ml) and 1 N NaOH (2×30 ml)
6. customThe organic phase was separated
7. washwashed with brine (30 ml)
8. dry with materialdried (MgSO4)
9. customevaporated
10. customThe residue was chromatographed (silica gel, 2.5% MeOH/CH2Cl2)
11. additionthe fractions containing the desired product
12. customevaporated
13. customThe residue was triturated with diethyl ether twice