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An efficient and green protocol for the synthesis of pyrazolo[1,2-a][1,2,4]triazole-1,3-diones derivatives by one pot, three component coupling reaction of aromatic aldehyde, malononitrile, and 4-phenylurazole has been developed using ZrO2 nanoparticles (NPs) as the catalyst. The procedure is formed in high yields, short reaction time and an environmentally friendly specificity. keywords: multicomponent reaction, ZrO2 nanoparticles (NPs), solvent-free, Malononitrile.

Zirconium Oxide Nanoparticles as an Efficient Catalyst for Three-Component Synthesis of Pyrazolo[1,2-A][1,2,4]Triazole-1,3-Diones Derivatives