Document Type: Original Paper
Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Department of Chemistry, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, Iran
An atom-efficient, eco-friendly, solvent-free, high yielding, multicomponent green strategy to synthesize triazolo[1,2-a]indazole-triones derivatives by the one-pot condensation of aldehyde, dimedone, and phenyl urazole under microwave Irradiationis presented. Reactions catalyzed by A novel nanomagnetic organic-inorganic hybrid catalyst (Fe@Si-Gu-Prs) was prepared by the chemical anchoring of Preyssler heteropolyacid (H14[NaP5W30O110]) onto the surface of modified Fe3O4 magnetic nanoparticles with guanidine-propyl-trimethoxysilane linker. A series of different substituted aromatic aldehydes including either electron-withdrawing or electron-donating groups used in this reaction participated well and gave the corresponding products in good to excellent yield. In this method, catalyst was isolated and reused several times, at least four times without significant loss of activity.