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■ A Novel Synthesis of Pyridazinones: Preparation of 3-[1-Aryl-6(1H)-pyridazinon-3-yl]-2(1H)-quinoxalinones

El Sayed H. El Ashry, Yeldez El Kilany, and Adel Amer

*Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt

Abstract

A novel approach for the synthesis of pyridazinones has been achieved by the reaction of α-formylhydrazones with carboethoxymethylidene triphenylphosphorane. The mode of the reaction was investigated and the structures were confirmed by both physical and chemical methods. Thus, 3- [1-aryl-6(1H)-pyridazinon-3-yl]-2(1H-quinoxalinon(19) were prepared.