Pyrazolidinedione derivatives (II) are prepared through the hitherto unknown nucleophilic addition of l-phenyl-3,5-pyrazolidinedione to chalcones (I). Reactions of II with phenylhydrazine, hydrazine hydrate, hydroxylamine hydrochloride and aromatic amines afford the corresponding phenylhydrazones, diazepene derivatives, oximes and arylidene derivatives. Behaviour of II towards polyphosphoric acid, Grignard reagents, phosphorus pentasulphide and acetylating agent has also been investigated.
M EL MOBAYED ,N AHMED ,G H SAYED ,A A HAMED ,
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