反应详情

A mixture of toluene (20 ml), 2-methylbenzimidazole (0.55 g, 4.2 mmole), triethylamine (0.42 g, 4.2 mmole) and 4-(4-ethoxyphenoxy)benzyl chloride (1.00 g, 3.8 mmole) was heated under reflux for 5 hours and then cooled to room temperature. The resultant mixture was washed with water, dried over anhydrous sodium sulfate and distilled under reduced pressure to remove toluene. The residue was purified by silica gel column chromatography to give 1-[4-(4-ethoxyphenoxy)benzyl]-2-methylbenzimidazole (1.20 g) as colorless liquid. nD26.0 1.5984.

1. temperaturewas heated
2. temperatureunder reflux for 5 hours
3. washThe resultant mixture was washed with water
4. dry with materialdried over anhydrous sodium sulfate
5. distillationdistilled under reduced pressure
6. customto remove toluene
7. customThe residue was purified by silica gel column chromatography