Ferromagnetic nanoparticle-supported copper complex: A highly efficient and reusable catalyst for three-component syntheses of 1,4-disubstituted 1,2,3-triazoles and C-S coupling of aryl halides
作者:Mohammad Mehdi Khodaei、Kiumars Bahrami、Farhat Sadat Meibodi
DOI:10.1002/aoc.3714
日期:2017.10
A new nanocatalyst was synthesized by immobilization of 4′‐(4‐hydroxyphenyl)‐2,2′:6′,2″‐terpyridine/CuI complex on ferromagnetic nanoparticles through a surface modification (FMNPs@SiO2‐TPy‐Cu). This heterogeneous catalyst was characterized using various techniques including Fourier transform infrared and energy‐dispersive X‐ray spectroscopies, transmission and scanning electron microscopies, X‐ray
Copper-Catalyzed Huisgen and Oxidative Huisgen Coupling Reactions Controlled by Polysiloxane-Supported Amines (AFPs) for the Divergent Synthesis of Triazoles and Bistriazoles
click reactions mediated by a polysiloxane‐supported secondary amine allow the preparation of novel heterocyclic compounds, that is, bistriazoles. Comparably, it is also surprising that the use of a diamine‐functional polysiloxane as ligand led to a classic Huisgen [3+2] cycloaddition in excellent yields. From the results of the present amine‐functional polysiloxanes‐controlledHuisgenreaction or oxidative
NNN-pincer-copper complex immobilized on magnetic nanoparticles as a powerful hybrid catalyst for aerobic oxidative coupling and cycloaddition reactions in water
作者:Nasrin Zohreh、Mahboobeh Jahani
DOI:10.1016/j.molcata.2016.11.007
日期:2017.1
such as SEM, TEM, FT-IR, TGA, ICP, XRD, and elemental analysis. The finely engineered supported catalyst is employed in the aerobic oxidative coupling of terminalalkynes and click reaction using only 0.38 and 0.04 mol% catalyst, respectively. All reactions perform under solvent-free condition or green solvent H 2 O. Also, the catalyst is readily recovered and reused for up to 8 and 6 subsequent runs
摘要 描述了一种简单可靠的方法,用于制备第一个对表面组成具有高度控制的非均相 NNN-钳形铜杂化催化剂。该策略依赖于 2-氨基吡啶与三聚氯氰功能化磁性纳米粒子的共价键合,然后与 CuI 络合。这些声明通过不同的表征方法得到证实,例如 SEM、TEM、FT-IR、TGA、ICP、XRD 和元素分析。精细设计的负载型催化剂用于末端炔烃的有氧氧化偶联和点击反应,分别仅使用 0.38 和 0.04 mol% 的催化剂。所有反应均在无溶剂条件或绿色溶剂 H 2 O 下进行。此外,
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.
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。