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Communication | Regular issue | Vol 19, No. 5, 1982, pp.819-824
Published online, 1st January, 1970
DOI: 10.3987/R-1982-05-0819
Hydrazones as New 4-Electrons Three Atomic Centers in Cycloaddition Reactions: A Novel Approach for the Synthesis of Pyrazole Derivatives

Yehia A. Ibrahim, Sadek E. Abdou, and Sami Selim

*Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt

Abstract

Aromatic aldehydes and acetophenone phenylhydrazones undergo cycloaddition reactions with maleimides to give the pyrrolo[3,4-d]pyrazole derivatives via a novel pericyclic reaction involving easily accessible 4π-electrons neutral three atomic centers.