Impregnated copper ferrite on mesoporous graphitic carbon nitride: An efficient and reusable catalyst for promoting ligand‐free click synthesis of diverse 1,2,3‐triazoles and tetrazoles
作者:Dariush Khalili、Meysam Rezaee
DOI:10.1002/aoc.5219
日期:2019.11
Magnetic CuFe2O4/g‐C3N4 hybrids were synthesized through a facile method and their catalytic performances were evaluated in clickchemistry for the first time. The structural and morphological characterization of prepared materials was carried out by different techniques such as X‐ray diffraction, high‐resolution transmission electron microscopy, field emission scanning electron microscopy, Fourier
通过简便的方法合成了磁性CuFe 2 O 4 / g-C 3 N 4杂化物,并首次在点击化学中评估了它们的催化性能。所制备材料的结构和形态表征是通过不同的技术进行的,例如X射线衍射,高分辨率透射电子显微镜,场发射扫描电子显微镜,傅立叶红外光谱,振动样品磁力分析,热重分析和N 2吸附–解吸分析(Brunauer-Emmett-Teller表面积)。磁性CuFe 2 O 4 / g‐C 3 N 4的利用率使用烷基卤和环氧化物作为叠氮化物前体,可在水中进行一锅叠氮化物-炔烃环加成反应中获得优异性能,而无需任何其他试剂。本系统的范围很广,对于大环三唑以及四唑的合成特别实用。此外,该催化系统具有便利的条件,特别是在低催化剂负载量下易于获得各种重要产品,并且易于操作和分离的方法,可高度满足“绿色点击化学”的要求。
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
Design and Preparation of Hallow Mesoporous Silica Spheres Include CuO and Its Catalytic Performance for Synthesis of 1,2,3-Triazole Compounds via the Click Reaction in Water
novel nanostructured catalyst based on CuO included hallow mesoporous silica spheres (CuO–HMSS) was prepared for synthesis of 1,2,3-triazole compounds. The hallow silica spheres were synthesized via the hydrothermal procedure. The characterization of prepared catalyst was also performed applying several analysis techniques such as TEM and SEM, EDX, XRD, and ICP.Graphical Abstract CuO active sites in
Copper(I)–Caffeine Complex Immobilized on Silica-Coated Magnetite Nanoparticles: A Recyclable and Eco-friendly Catalyst for Click Chemistry from Organic Halides and Epoxides
evaluated for green synthesis of 1,2,3-triazoles through the three-componentreaction of various terminal alkynes with in situ generated organic azides from organic halides and epoxides in an aqueous medium that was observed to proceed well and products were obtained in good yields. In addition to showing outstanding catalytic activity, the magnetic catalyst is easy to synthesize and can be recycled
通过 FT-IR、X 射线衍射、扫描电子显微镜、能量色散 X 射线、电感耦合等离子体、热重分析和分析,成功合成了固定在二氧化硅包覆磁铁矿纳米颗粒上的铜(I)-咖啡因配合物。振动样品磁力计数据。通过各种末端炔烃与有机卤化物和环氧化物在水性介质中原位生成的有机叠氮化物的三组分反应,评估了这些磁性可回收纳米颗粒的催化活性,用于绿色合成 1,2,3-三唑,观察到进展顺利,产品收率良好。该磁性催化剂除了表现出优异的催化活性外,还易于合成,可循环使用至少5次,活性损失很小。
Immobilization of Porphyrinatocopper Nanoparticles onto Activated Multi-Walled Carbon Nanotubes and a Study of its Catalytic Activity as an Efficient Heterogeneous Catalyst for a Click Approach to the Three-Component Synthesis of 1,2,3-Triazoles in Water
An efficient, regioselective, one-pot and two-step synthesis of β-hydroxy 1,4-disubstituted1,2,3-triazolesfrom a wide range of non-activated terminal alkynes and epoxides and sodium azide by way of a three-component click reaction using a catalytic amount of [meso-tetrakis(o-chlorophenyl)porphyrinato]copper(II) (5 mol%) in excellent isolated yields is described. The reactions were performed in water