One-pot and efficient synthesis of triazolo[1,2-a]indazole-triones catalyzed by poly(ethylene glycol) based magnetic dicationic ionic liquid
محورهای موضوعی : Iranian Journal of CatalysisBijan Mombeni Goodajdar 1 , Soghra Soleimani 2
1 - Department of Chemistry, Islamic Azad University Omidiyeh Branch, Omidiyeh, Iran.
2 - Department of Chemistry, Islamic Azad University Omidiyeh Branch, Omidiyeh, Iran.
کلید واژه: Dimedone, One-pot, Urazole, Magnetic dicationic ionic liquid, polyethylene glycol,
چکیده مقاله :
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 is presented. 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. Poly (ethylene glycol) based magnetic room temperature dicationic ionic liquid, PEG-MRTDIL, was prepared by mixing PEG-DIL with anhydrous FeBr3 under neat conditions. The catalyst was studied by UV and IR spectroscopy. This method provides several advantages such as environment benign, high yield, simple work up procedure and reusable catalyst.
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