反应详情

温度

80 °C

A mixture of 190 mg (0.753 mmol) of 7-(2-ethylphenyl)-1-methyl-1,3-dihydro-2H-benzimidazol-2-one and 1.5 mL of phosphorus oxychloride was stirred at 80° C. for 5 hours. After cooling, the reaction mixture was poured into ice and neutralized by 12 N sodium hydroxide. The aqueous suspension was extracted with ethyl acetate (X2). The combined organic layer was washed with brine (X1), dried over sodium sulfate and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with a 3-10% ethylacetate/n-hexane gradient mixture to give 123 mg (60%) of the title compound.

1. temperatureAfter cooling
2. additionthe reaction mixture was poured into ice
3. extractionThe aqueous suspension was extracted with ethyl acetate (X2)
4. washThe combined organic layer was washed with brine (X1)
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated in vacuo
7. customThe residue was purified by silica gel column chromatography
8. washeluting with a 3-10% ethylacetate/n-hexane gradient mixture