反应详情

To a solution of 1-methyl-4-phenyl-1H-imidazole-2-carbaldehyde 43 (0.299 g, 1.61 mmol) in CCl4 (6 mL) was added N-chlorosuccinimide (229 mg, 1.72 mmol). The reaction mixture was heated to reflux for 4 h, cooled to room temperature, filtered, and concentrated. Purification by flash column chromatography on silica gel (5% to 20% EtOAc in hexanes) gave 5-chloro-1-methyl-4-phenyl-1H-imidazole-2-carbaldehyde 44. Mass spectrum: calculated for C1H9ClN2O 220.0; found 221.3 (M++1).

1. temperatureThe reaction mixture was heated
2. temperatureto reflux for 4 h
3. filtrationfiltered
4. concentrationconcentrated
5. customPurification by flash column chromatography on silica gel (5% to 20% EtOAc in hexanes)