One-pot synthesis of triazolo[1,2-a]indazole-triones catalyzed by a novel magnetically and reusable green catalyst of Preyssler

Authors

  • Ali Javid Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
  • Farid Moeinpour Department of Chemistry, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, Iran
  • Maryam Akbari Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Abstract:

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.

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Journal title

volume 7  issue 2

pages  1- 70

publication date 2017-11-01

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