反应详情

A suspension of ethyl [2-(4-chlorophenyl)-1-[4-(methylsulfonyl)phenyl]-1H-imidazol-4-yl] carboxylate (Example 159) (929 mg, 2.29 mmol) in 16 ml of methanol and 16 ml of 1N aqueous sodium hydroxide was stirred at reflux for one hour. After cooling, the mixture was concentrated, water was added, and the resulting mixture was acidified with acetic acid. The mixture was extracted with dichloromethane, and the combined organic extracts were dried over sodium sulfate, filtered, and evaporated. Acetic acid was removed by azeotropic distillation with toluene to give the title compound, 520 mg, as a white crystalline solid: mp (DSC) 121° C. Anal. Calc'd. for C17H13ClN2O4S.H2O (MW 394.83): C, 51.71; H, 3.32; N, 7.10. Found: C, 51.89; H, 3.29; N, 6.97.

1. temperatureat reflux for one hour
2. temperatureAfter cooling
3. concentrationthe mixture was concentrated
4. additionwater was added
5. extractionThe mixture was extracted with dichloromethane
6. dry with materialthe combined organic extracts were dried over sodium sulfate
7. filtrationfiltered
8. customevaporated
9. customAcetic acid was removed by azeotropic distillation with toluene