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Synthesis and Structure (Z)-N-Aryl-2-hydroxy-4-oxo-4-phenylbut-2-enamides

Reactions of 5-phenyl-2,3-dihydrofuran-2,3-dione with aromatic amines in anhydrous dioxane or methyl benzoylpyruvate with aromatic amines in the presence of sodium acetate in glacial acetic acid afforded (Z)-N-aryl-2-hydroxy-4-oxo-4-phenylbut-2-enamides.