MnO2 Nanoparticles as Efficient Oxidant for Ultrasound-Assisted Synthesis of 2-substituted Benzimidazoles under Mild Conditions |
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Authors: | Hossein Naeimi Zahra Babaei |
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Affiliation: | Department of Organic Chemistry, University of Kashan, Kashan, Iran |
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Abstract: | In this article, a novel method for synthesis of 2-substituted benzimidazoles using MnO2 nanoparticles as a convenient oxidant agent in ethanol-water (1:1) as solvent under ultrasound irradiation was demonstrated. In this protocol the desired products were purely obtained in high yields. The main advantages of this research are: mild procedure, simplicity of method, easily work-up, high yields, and short reaction times. The MnO2 nanoparticles were synthesized through a solid-state reaction route using simple strarting materials. Furthermore, their structure was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR). |
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Keywords: | Aryl aldehyde Benzimidazoles MnO2 nanoparticles O-phenylenedia-mine ultrasound irradiation |
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