[CH3:1][N:2]([O:7][CH3:8])[C:3](=[O:6])[CH2:4]Br.[C:9]([NH:12][C:13]1[CH:18]=[CH:17][C:16]([OH:19])=[CH:15][CH:14]=1)(=[O:11])[CH3:10].C(=O)([O-])[O-].[Cs+].[Cs+]>C(#N)C>[CH3:1][N:2]([O:7][CH3:8])[C:3](=[O:6])[CH2:4][O:19][C:16]1[CH:15]=[CH:14][C:13]([NH:12][C:9](=[O:11])[CH3:10])=[CH:18][CH:17]=1This bromoacetamide was dissolved in acetonitrile and to the solution were added 10.75 gm (71.15 mMol) 4-acetamidophenol followed by 23.10 gm (71.1 mMol) cesium carbonate. The reaction mixture was heated at reflux for 3 hours and then concentrated under reduced pressure. The residue was partitioned between dichloromethane and 1N aqueous sodium hydroxide. The organic phase was separated, washed sequentially with water and saturated aqueous sodium chloride, dried over magnesium sulfate and concentrated under reduced pressure. The residue was subjected to silica gel chromatography, eluting with ethyl acetate. Fractions containing product were combined and concentrated under reduced pressure to provide 10.34 gm (74%) of the desired compound.
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