反应详情

温度

120 °C

To a solution of 7-methoxy-N,2-dimethylimidazo[1,2-α]pyridine-3-carboxamide (985 mg, 4.49 mmol) in DMF (20 ml) was added sodium thioethylate (80% pure, 1.86 g, 18 mmol) and the mixture heated to 120° C. for 2 hours. After cooling to ambient temperature, the reaction was neutralized to pH 6 with 1N HCl and concentrated in vacuo. The residue was dissolved in MeOH/H2O, pre-absorbed onto SiO2, and purified by flash chromatography (eluting with 90/10/1-80/20/5, DCM/MeOH/cNH3) to yield the crude product as a yellow solid, which was titrated with MeOH to yield 7-hydroxy-N,2-dimethylimidazo[1,2-α]pyridine-3-carboxamide 111-B, 700 mg, 78%, as a pale yellow solid.

1. temperatureAfter cooling to ambient temperature
2. concentrationconcentrated in vacuo
3. dissolutionThe residue was dissolved in MeOH/H2O
4. custompre-absorbed onto SiO2
5. custompurified by flash chromatography (eluting with 90/10/1-80/20/5, DCM/MeOH/cNH3)
6. customto yield the crude product as a yellow solid, which