反应详情

温度

55 °C

To a solution of 19.3 g (0.077 mole) of acetic acid, 4-[4-(acetylamino)phenyl]butyl ester in 300 ml of ethanol, add a solution of 21 g potassium carbonate in 300 ml of water. Heat the resulting solution at 55° C. for 4 hrs, following the progress of the reaction by thin-layer chromatography on silica gel (acetonitrile: ammonium hydroxide, 90:10). At the completion of the reaction, filter off any insolubles and remove the ethanol in vacuo. Extract the aqueous residue with 3×300 ml methylene chloride. Wash the combined organic layers with 100 ml water, dry over potassium carbonate, filter and remove the solvent in vacuo. Recrystallize the resulting solid from 140 ml acetonitrile to obtain the title compound.

1. customthe progress of the reaction by thin-layer chromatography on silica gel (acetonitrile: ammonium hydroxide, 90:10)
2. customAt the completion of the reaction
3. filtrationfilter off any insolubles
4. customremove the ethanol in vacuo
5. extractionExtract the aqueous residue with 3×300 ml methylene chloride
6. washWash the combined organic layers with 100 ml water
7. dry with materialdry over potassium carbonate
8. filtrationfilter
9. customremove the solvent in vacuo
10. customRecrystallize the resulting solid from 140 ml acetonitrile