Immobilized copper nanoparticles on nitrogen-rich porous activated carbon from egg white biomass: a robust hydrophilic–hydrophobic balance catalyst for click reaction
Nitrogen-rich porous carbon (NAC) material was synthesized from egg white biomass via pyrolysis, followed by chemical activation with KOH. Then, the copper nanoparticles were immobilized on the surface of the NAC by chemical reduction method.
Greener synthesis of 1,2,3-triazoles using a copper(<scp>i</scp>)-exchanged magnetically recoverable β-zeolite as catalyst
作者:Elizama R. Costa、Floyd C. D. Andrade、Danilo Yano de Albuquerque、Luanne E. M. Ferreira、Thiago M. Lima、Carolina G. S. Lima、Domingos S. A. Silva、Ernesto A. Urquieta-González、Márcio W. Paixão、Ricardo S. Schwab
DOI:10.1039/d0nj02473b
日期:——
Herein, we describe the preparation and thorough characterization of a novel magnetically recoverable copper(I)-exchanged β-zeolite and its use as an efficient catalyst for the synthesis of 1,2,3-triazoles via the one-pot three-component reaction of organic halides, terminal acetylenes, and sodium azide in water. The magnetically recoverable β-zeolite could be easily separated from the reaction mixture
Novel Hybrid Thioamide Ligand Supported Copper Nanoparticles on SBA-15: A Copper Rich Robust Nanoreactor for Green Synthesis of Triazoles and Tetrazoles in Water Medium
作者:Fatemeh Pourhassan、Hossein Eshghi
DOI:10.1007/s10562-019-03031-y
日期:2020.5
groups via Willgerodt-Kindlerreaction. This porous material proved to be an effective host for the immobilization of inexpensive Cu(II) ions. The catalytically active Cu(I) species were generated automatically due to the reductive nature of thioamide modified surface of catalyst without use of any toxic reducing agents. The well stabilized Cu(I) species into the nano-channels of SBA-15 were used for synthesis
Zeo-click synthesis: CuI-zeolite-catalyzed one-pot two-step synthesis of triazoles from halides and related compounds
作者:Valérie Bénéteau、Andrea Olmos、Thirupathi Boningari、Jean Sommer、Patrick Pale
DOI:10.1016/j.tetlet.2010.05.036
日期:2010.7
CuI-zeolites proved to be an efficient heterogeneous catalyst for the one-pottwo-stepsynthesis of triazoles from halides or tosylates, sodium azide, and alkynes. The step and atom economies of this cascade reaction as well as water used as solvent and catalyst recycling make such synthesis a trully green process. With selected substrates, the peculiar roles of CuI-zeolites as catalysts were highlighted
A highlydispersible and magnetically recoverable Cu-PEI@Fe$_3}$O$_4}$ MNPs catalyst was prepared and successfully applied in one-pot three-component coupling of terminal alkynes, sodium azide, and alkyl bromides/chlorides in water to give 1,4-disubstituted 1,2,3-triazoles with good to excellent yields. The catalyst was fully characterized with FT-IR, TGA, TEM, SEM, VSM, EDX, cyclic voltammetry,
制备了高度分散且可磁回收的Cu-PEI @ Fe $ _ 3} $ O $ _ 4} $ MNPs催化剂,并将其成功应用于末端炔烃,叠氮化钠和烷基溴的一锅三组分偶联/氯化物在水中生成1,4-二取代的1,2,3-三唑类化合物,收率好至极好。通过FT-IR,TGA,TEM,SEM,VSM,EDX,循环伏安法和ICP-AES光谱技术对催化剂进行了全面表征。此外,该催化剂易于被外磁体再循环并成功地在反应中重复使用了六次,而没有明显丧失其催化活性和铜的浸出。即使在水性介质中甚至有0.1 mol%的催化剂,也可以在不存在任何碱和还原剂的情况下进行大规模反应,因此该方案非常适合实际应用。