Studies on 3,5-pyrazolidinediones. IV. Addition of 4-Arylazo-3,5-pyrazolidinediones to Ethyl Acrylate

@inproceedings{Elnagdi1973StudiesO3,
  title={Studies on 3,5-pyrazolidinediones. IV. Addition of 4-Arylazo-3,5-pyrazolidinediones to Ethyl Acrylate},
  author={Mohamed Helmi Elnagdi and Masaki Ohta},
  year={1973}
}
4-Arylazo-3,5-pyrazolidinediones (I) react with ethyl acrylate to yield the corresponding 1-β-ethoxycarbonylethyl derivatives (III), which were readily hydrolyzed into the acids IV. Compounds III and IV were found to react with acrylonitrile to yield the corresponding 1-substituted 2-β-cyanoethyl derivatives V and VI respectively. Whereas III and IV were recovered unchanged upon treatment with aniline or piperidine, the arylazomalonic acid dihydrazide (IX) were formed upon treatment of III or… CONTINUE READING