Ferrite nanoparticles supported on natural wool in one-pot tandem oxidative reactions: strategy to synthesize benzimidazole, quinazolinone and quinoxaline derivatives

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• 作者：Ahmad Shaabani and Zeinab Hezarkhani
• 刊名：Applied Organometallic Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：31
• 期：1
• 全文大小：1723K
• ISSN：1099-0739

文摘

Two tandem oxidative two-component reactions (O-2CRs) and Ugi-type three-component reactions (OU-3CRs) of aromatic hydrocarbons of petroleum naphtha have been investigated for the synthesis of 2-phenyl-1H-benzo [d]imidazole, 2-aryl-4-quinazolinone and 3,4-dihydroquinoxalin-2-amine derivatives using six new biopolymer-supported ferrite nanocatalysts: CoFe₂O₄@wool-SO₃H, MnFe₂O₄@wool-SO₃H, ZnFe₂O₄@wool-SO₃H, MnCoFe₂O₄@wool-SO₃H, ZnCoFe₂O₄@wool-SO₃H and CrCoFeO₄@wool-SO₃H. The best results are obtained with the CrCoFeO₄@wool-SO₃H catalyst. All of the catalysts were characterized using flame atomic absorption spectrometry, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy and energy-dispersive spectroscopy. To the best of our knowledge, this approach can be considered as the first example of O-2CRs and OU-3CRs of aromatic hydrocarbons of petroleum naphtha with ferrite nanocatalysts, which would be very useful from a practical point of view. Copyright