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Polycyclic Aromatic Compounds Volume 36, 2016 - Issue 4
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Original Articles

MnO2 Nanoparticles as Efficient Oxidant for Ultrasound-Assisted Synthesis of 2-substituted Benzimidazoles under Mild Conditions

Hossein NaeimiDepartment of Organic Chemistry, University of Kashan, Kashan, IranCorrespondence[email protected]
&
Zahra BabaeiDepartment of Organic Chemistry, University of Kashan, Kashan, Iran
Pages 490-505 | Received 25 Nov 2014, Accepted 30 Jan 2015, Published online: 11 Sep 2015
 
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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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