反应详情

温度

120 °C

A mixture of 2,4-dichloro-7-(1-ethylpropyl)-1-methyl-1H-benzimidazole (200 mg, 0.750 mmol), 2,4-dichloro-6-methylphenol (398 mg, 2.25 mmol), potassium carbonate (311 mg, 2.25 mmol) and 1-methyl-2-pyrrolidone (0.5 ml) was stirred at 120° C. for 12 h under nitrogen atmosphere. The mixture was diluted with water, extracted with ethyl acetate, and washed with brine. The organic layer was dried over magnesium sulfate, and concentrated in vacuo. The residue was purified by chromatography on silica gel with a 2-30% ethyl acetate/n-hexane gradient mixture and crystallized from methanol to afford the title compound as colorless crystals (109 mg, 36%).

1. extractionextracted with ethyl acetate
2. washwashed with brine
3. dry with materialThe organic layer was dried over magnesium sulfate
4. concentrationconcentrated in vacuo
5. customThe residue was purified by chromatography on silica gel with a 2-30% ethyl acetate/n-hexane gradient mixture
6. customcrystallized from methanol