Quinuclidine Stabilized on FeNi3 Nanoparticles as Catalysts for Efficient, Green, and One-Pot Synthesis of Triazolo[1,2-a]indazole-triones

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  • Dr. Seyed Mohsen Sadeghzadeh

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    1. Department of Chemistry, College of Sciences, Birjand University, P.O. Box 97175-615, Birjand (Iran), Fax: (+98) 561-2502065
    • Department of Chemistry, College of Sciences, Birjand University, P.O. Box 97175-615, Birjand (Iran), Fax: (+98) 561-2502065

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Abstract

A new magnetically separable catalyst consisting of quinuclidin-3-thiol supported on propylsilane-functionalized silica-coated FeNi3 nanoparticles (FeNi3/quinuclidine) has been prepared. The synthesized catalyst was characterized by powder X-ray diffraction, transmission electron microscopy, vibrating sample magnetometry, thermogravimetric analysis, and Fourier transform infrared spectroscopy. The immobilized FeNi3/quinuclidine was shown to be an efficient heterogeneous catalyst for the synthesis of triazolo[1,2-a]indazole-triones under solvent-free conditions at room temperature. The catalyst is readily recovered by simple magnetic decantation and can be recycled several times with no significant loss of catalytic activity.

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