Abstract
4-Formyl-2-pyrazolin-5-ones (1a,b) is condensed with hippuric acid derivatives (2a,b) to give the corresponding pyrazolylmethylidene azalactones (3a-d). Aminolysis of oxazolones (3) with aromatic amines in boiling acetic acid afforded imidazolones (4a-l). Treatment of oxazolones (3) with benzene in the presence of AlCl3 afforded ?-benzamidoacetophenone (5). Structural assignments of the new products were based on elemental analysis and IR, 1H NMR spectral data.
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