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Synthesis of a heterogeneous Cu(OAc)2-anchored SBA-15 catalyst and its application in CuAAC reaction

Abstract

A novel dinuclear copper(II) solid catalyst (Cu@SBA-15-PTAA) was obtained by anchoring Cu(OAc)2 onto a carboxyl functionalized mesoporous SBA-15 silica via a simple proton-exchange method in water. Its structure was characterized by various techniques such as FT-IR, XRD, HRTEM, BET, EPR and EXAFS. The resulted Cu@SBA-15-PTAA exhibited excellent catalytic ability for the cycloaddition reaction of organic azides and terminal alkynes in water without the addition of external reducing agent and base. With 2 mol% of Cu@SBA-15-PTAA as catalyst, a number of functionalized 1,4-disubstituted 1,2,3-triazoles were obtained with an exclusive regioselectivity in excellent yields under heterogeneous conditions. After separation the products by simple organic solvent extraction, the remained catalyst could be reused at least for five times. Moreover, the mechanism study deduced that the reaction might be synergistically catalyzed by two supported Cu(II) species in Cu@SBA-15-PTAA.

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Publication details

The article was received on 19 Nov 2017, accepted on 08 Jan 2018 and first published on 10 Jan 2018


Article type: Letter
DOI: 10.1039/C7NJ04495J
Citation: New J. Chem., 2018, Accepted Manuscript
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    Synthesis of a heterogeneous Cu(OAc)2-anchored SBA-15 catalyst and its application in CuAAC reaction

    N. Sun, Z. Yu, H. Yi, X. Zhu, L. Jin, B. Hu, Z. Shen and X. Hu, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C7NJ04495J

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