Novel Approach to Benzimidazoles Using Fe₃O₄ Nanoparticles as a Magnetically Recoverable Catalyst

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• 作者：Bahador KARAMI^a ; ^{karami@mail.yu.ac.ir} ; Shaghayegh NIKOSERESHT^b ; Saeed KHODABAKHSHI^a
• 关键词：ferroferric oxide nanoparticle ; 1 ; 2-phenylenediamine ; orthoester ; benzimidazole
• 刊名：Chinese Journal of Catalysis
• 出版年：2012
• 期刊代码：3_18722067
• 类别：ce
• 出版时间：February-March, 2012
• 卷：33
• 期：2-3
• 页码：298-301
• 文件大小：249 K

摘要

Magnetically recoverable Fe₃O₄ nanoparticles have been synthesized as a catalyst for the cyclocondensation of 1,2-phenylenediamines with orthoesters under solvent-free conditions. Catalyst loadings can be as low as 1 mol%to give high yields of the corresponding benzimidazole derivative at 80 掳C. This green method offers significant advantages in terms of its simplicity, low catalyst loadings, high product yields, and non-toxic nature. The Fe₃O₄ nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy.