Abstract 1, 2-Diaryl-4-arylmethylene-2-imidazolin-5-ones were prepared by the interaction of primary aromatic amines with 2-aryl-4-arylmethylene-2-oxazolin-5-ones in the presence of acetic acid and sodium acetate. The same imidazolones were also obtained by the cyclization of the arylamides of α-arylamido-β-arylacrylic acids under the same reaction conditions. A possible reaction mechanism was postulated.
![2-(4-chlorophenyl)-4-[(3-nitrophenyl)methylidene]-1,3-oxazol-5-one Structure](https://image.chemsrc.com/caspic/305/40547-10-2.png)