Heterogenized copper catalysts for the amination of arylhalide: Synthesis,characterization and catalytic applications |
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| Authors: | Nandkumar M Patil Sunil P Gupte Raghunath V Chaudhari |
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| Affiliation: | 1. Chemical Engineering and Process Development Division, National Chemical Laboratory, Pune 411008, India;2. Department of Chemical & Petroleum Engineering, Center for Environmentally Beneficial Catalysis, The University of Kansas, 1501 Wakarusa Dr. A, Suite 110, Lawrence, KS 66047, USA;1. Department of Physics, Faculty of Basic Sciences, Turkish Military Academy, Cankaya, 06654 Ankara, Turkey;2. Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayis University, Kurupelit, 55139 Samsun, Turkey;3. Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayis University, Kurupelit, 55139 Samsun, Turkey;4. Department of Computer Engineering, Faculty of Engineering, Ondokuz Mayis University, Kurupelit, 55139 Samsun, Turkey;1. Department of Bioorganic Chemistry, Institute of Chemistry and Food Technology, Faculty of Engineering and Economics, Wroc?aw University of Economics, 118/120 Komandorska, 53-345 Wroc?aw, Poland;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroc?aw, Poland;1. Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvil?n? Plentas 19, LT-50254 Kaunas, Lithuania;2. Department of Solid State Electronics, Vilnius University, Saul?tekio al?ja 9, LT-10222 Vilnius, Lithuania;1. Centre for Advanced Studies in Physics, GC University, Lahore, 54000, Pakistan;2. Department of Physics, GC University, Lahore, 54000, Pakistan;1. Department of Physics, Faculty of Science, King Khalid University, P.O.Box-9004, Abha 61413, Saudi Arabia;2. Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, P.O.Box-1988, Najran 11001, Saudi Arabia;3. Department of Chemistry, Faculty of Science and Arts, Najran University, P.O.Box-1988, Najran 11001, Saudi Arabia;4. Department of Physics, Faculty of Science and Arts, Najran University, P.O.Box-1988, Najran 11001, Saudi Arabia |
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| Abstract: | This research investigated the synthesis, characterization and catalytic activity of heterogenized copper complexes for the selective amination of aryl halides. Amination reactions using homogeneous copper catalyst systems are not generally selective and it is also difficult to recover the catalyst from the homogeneous system for recycling. To overcome these difficulties, our efforts were directed towards the development of cheaper heterogeneous catalyst systems, which can be easily recovered and recycled. Heterogenized analogs of the homogenous Cu complexes were prepared using two methods: (a) encapsulation of copper complexes in zeolite-Y and (b) tethering of copper complexes on various supports like zeolite-Y, silica, charcoal, or clay. The encapsulated and tethered copper catalysts on zeolite-Y were characterized using EPR, Diffused reflectance UV–vis, XRD, IAS, ICPES, SEM, and TEM. The results confirmed that the copper complexes were truly heterogenized in zeolite-Y support. Encapsulated and tethered copper complexes were tested for amination of aryl iodide. The effects of various reaction parameters were examined using tethered Cu(Phen)(PPh3)Br-PTA-Y catalyst to determine optimum conditions. A recycle study of encapsulated and tethered Cu catalyst was carried out to test their robustness for possible commercial exploitation. |
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