反应详情

A mixture of 1,5-dimethyl-4-hydroxymethyl-2-(4-trifluoromethylphenyl)imidazole (0.5 g) and manganese dioxide (2 g) in 20 ml of chloroform was refluxed for 24 hours. A further 2 g of manganese dioxide was added, and the mixture refluxed for a further 3 hours. The mixture was cooled, the solid material filtered off, and washed with methylene chloride. The solvent was removed from the filtrate under reduced pressure, to yield 0.5 g of 1,5-dimethyl-4-formyl-2-(4-trifluoromethylphenyl)imidazole, m.p. 144° C.

1. temperaturewas refluxed for 24 hours
2. temperaturethe mixture refluxed for a further 3 hours
3. temperatureThe mixture was cooled
4. filtrationthe solid material filtered off
5. washwashed with methylene chloride
6. customThe solvent was removed from the filtrate under reduced pressure