反应详情

A mixture of 8-amino-3-carboethoxy-2,6-dimethylimidazo[1,2-a]pyridine (1.4 g, 6 mmol), 2-ethyl-6-methylbenzaldehyde (0.9 g, 6.5 mmol), ZnCl2 (1.0 g, 7.4 mmol), NaB(CN)H3 (0.41 g, 6.5 mmol) and MeOH (30 ml) was refluxed for 5 h. More ZnCl2 (0.2 g) and NaB(CN)H3 (0.1 g) were added. The reaction mixture was refluxed for additional 2 h. Triethylamin (2 ml) was added and the mixture was stirred at R.T for 10 min. The solvent was evaporated under reduced pressure and the residue was purified by column chromatography on silica gel using methylene chloride as eluent. 1.1 g (50%) of the title compound was obtained.

1. temperaturewas refluxed for 5 h
2. temperatureThe reaction mixture was refluxed for additional 2 h
3. customThe solvent was evaporated under reduced pressure
4. customthe residue was purified by column chromatography on silica gel