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■ Synthesis of Azoloyl Ketone and Azoloylacetic Acid Derivatives: Reactions of 4-Arylazo-2-oxazolin-5-ones with Active Methylene Compounds

Mohamed Ali Elsayed Khalifa, Gamal H. Tammam, Ramadan M. Abdel-Motaleb, and Mohamed H. Elnagdi

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

Abstract

The rearrangement of 4-arylazo-2-oxazolin-5-ones (1) with active methylene compounds was investigated. The 1,2,4-triazolyl derivatives (11) could be obtained on treatment of with 2-pyrazolin-5-one derivatives. The behaviour of the synthesised derivatives toward an aromatic diazonium salt was also investigated.