反应详情

6-bromoimidazo[1,2-a]pyridine-3-carbaldehyde (Compound of step 1 of Intermediate 1, 200 mg, 0.89 mmol), 2,4-dimethoxypyrimidin-5-ylboronic acid (212.57 mg, 1.15 mmol), dichlorobis(triphenylphosphine) palladium (II) (20 mg, 10% mmol) and 2M aqueous Na2CO3 (1 mL) were added to DMF (8 mL) and refluxed for 3 hours. The reaction mixture was diluted with ethyl acetate and washed with H2O and brine. The solvent was evaporated to obtain crude product, which was purified by column chromatography (silica gel, 1% methanol in chloroform) to obtain the title compound. Yield: 47.43%; 1H NMR (DMSO-d6; 300 MHz): δ 9.97 (s, 1H), 9.59 (s, 1H), 8.56-8.58 (d, 2H, J=4.5 Hz), 7.88-7.98 (m, 2H), 3.96 (s, 3H), 3.98 (s, 3H); MS: m/z 285.1 (M+1)+

1. temperaturerefluxed for 3 hours
2. washwashed with H2O and brine
3. customThe solvent was evaporated
4. customto obtain crude product, which
5. customwas purified by column chromatography (silica gel, 1% methanol in chloroform)