Synthesis of a bistriazolyl-phenanthroline–Cu(<scp>ii</scp>) complex immobilized on nanomagnetic iron oxide as a novel green catalyst for synthesis of imidazoles <i>via</i> annulation reactions
Raed H. AlthomaliDepartment of Chemistry, College of Arts and Science, Prince Sattam Bin Abdulaziz University, Wadi Al-Dawasir 11991, Saudi ArabiaEbraheem Abdu Musad SalehDepartment of Chemistry, College of Arts and Science, Prince Sattam Bin Abdulaziz University, Wadi Al-Dawasir 11991, Saudi ArabiaRiyadh Hasan Mohammed AliDepartment of Medical Laboratory, Al-Rafidain University College, Iraq, BaghdadIkromjon MamadolievDepartment of Anatomy, Tashkent State Dental Institute, Tashkent, UzbekistanMontather F. RamadanCollege of Dentistry, Al-Ayen University, Thi-Qar, IraqAshwaq Talib KareemCollege of Pharmacy, National University of Science and Technology, Dhi Qar, IraqSaurabh AggarwalDepartment of Mechanical Engineering, Uttaranchal Institute of Technology, Uttaranchal University, Dehradun-248007, IndiaSalema K. HadrawiRefrigeration and Air-conditioning Technical Engineering Department, College of Technical Engineering, The Islamic University, Najaf, Iraq
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@DAA-BTrzPhen-Cu(ii)] as a novel and magnetically separable heterogeneous nanocatalyst was evaluated in preparing various tetrasubstituted imidazole derivatives from one-pot four-component condensation of anilines, aldehydes, 1,2-diketones and ammonium acetate, and favorable products were produced with excellent yields. The stability, low Cu leaching, and heterogenous nature of the nanocatalyst were confirmed by hot-filtration and leaching tests. The copper based nanocatalyst could be easily recovered by magnetic field separation and recycled at least 8 times in a row without noticeable loss in its catalytic activity.
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