Modified chitosan-zeolite supported Pd nanoparticles: A reusable catalyst for the synthesis of 5-substituted-1H-tetrazoles from aryl halides.

Mohaddeseh Sajjadi, Mahmoud Nasrollahzadeh, Hossein Ghafuri, Talat Baran, Yasin Orooji, Nuray Yılmaz Baran, Mohammadreza Shokouhimehr

International journal of biological macromolecules 2022 Jun 01

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A novel heterogeneous catalyst has been developed using chitosan-zeolite supported Pd nanoparticles (PdNPs@CS-Zeo) and used in an efficient synthesis of 5-substituted-1H-tetrazoles from aryl halides with high yields for relatively short reaction times with an easy work-up procedure. In this method, highly effective and reusable PdNPs@CS-Zeo catalyst was used in the reaction of various aryl iodides/bromides with K4[Fe(CN)6] as a non-toxic cyanide source to catalyze the [2 + 3] cycloaddition of the corresponding aryl nitriles with NaN3 in the sequential one-pot preparation of 5-substituted-1H-tetrazoles. The synthesized PdNPs@CS-Zeo nanocatalyst was characterized using XRD, FTIR, TEM, HRTEM, XPS, Raman, TG-DTG, ICP-OES, BET, and EDS mapping. Additionally, the nanocatalyst could be effectively separated by filtration and reused for multiple times without significant decrease of catalytic activity. Copyright © 2022. Published by Elsevier B.V.

Citation

Mohaddeseh Sajjadi, Mahmoud Nasrollahzadeh, Hossein Ghafuri, Talat Baran, Yasin Orooji, Nuray Yılmaz Baran, Mohammadreza Shokouhimehr. Modified chitosan-zeolite supported Pd nanoparticles: A reusable catalyst for the synthesis of 5-substituted-1H-tetrazoles from aryl halides. International journal of biological macromolecules. 2022 Jun 01;209(Pt A):1573-1585