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
Design and synthesis of magnetic Fe<sub>3</sub>O<sub>4</sub>@NFC-ImSalophCu nanocatalyst based on cellulose nanofibers as a new and highly efficient, reusable, stable and green catalyst for the synthesis of 1,2,3-triazoles
VSM, and ICP spectroscopy. This catalyst shows the dual function of the metal sites and imidazolium moieties. The catalytic system mentioned above also showed excellent activity in the synthesis of bis 1,4-disubstituted 1,2,3-triazoles. Moreover, the catalyst could be recycled and reused for four cycles without any decrease in its catalyticactivity.
Fe 3 O 4 @NFC-ImSalophCu催化剂作为一种高度稳定、可重复使用、活性高的绿色催化剂,用于苯甲酰溴、叠氮化钠和炔烃的一锅三组分反应合成1,2,3-三唑类化合物。制备了含有咪唑鎓离子相的Cu( II )-席夫碱配合物,并将其修饰在核壳Fe 3 O 4 @NFC磁性纳米粒子(Fe 3 O 4 @NFC-ImSalophCu)上,并用作高效催化剂。采用 FT-IR 光谱、FE-SEM、TEM、XRD 光谱、EDX 光谱、VSM 和 ICP 光谱对非均相催化剂进行了表征。该催化剂显示出金属位点和咪唑鎓部分的双重功能。上述催化体系在双1,4-二取代1,2,3-三唑的合成中也表现出优异的活性。此外,该催化剂可以回收并重复使用四个周期,其催化活性没有任何降低。
Magnetic starch nanocomposite as a green heterogeneous support for immobilization of large amounts of copper ions: heterogeneous catalyst for click synthesis of 1,2,3-triazoles
new magnetic heterogeneous copper catalyst was prepared by immobilization of copper ions onto a cross-linked polymeric nanocomposite composed of starch grafted polyacrylamide and functionalized Fe3O4 magnetic nanoparticles. The resulting support was loaded with large amounts of copper ions (1.6 mmol g−1). The prepared catalyst is highly active in Huisgen 1,3-dipolar cycloadditionreactions of different
通过将铜离子固定在由淀粉接枝的聚丙烯酰胺和功能化的Fe 3 O 4磁性纳米粒子组成的交联聚合物纳米复合材料上,制备了一种新型的磁性异质铜催化剂。所得的载体上载有大量的铜离子(1.6mmol g -1)。所制备的催化剂在低催化剂量下对不同叠氮化物和炔烃的Huisgen 1,3-偶极环加成反应具有很高的活性。在温和的条件下以高收率生产了各种相应的1,2,3-三唑。该催化剂易于回收并再用于十个反应循环,没有观察到明显的催化活性损失。
Polystyrene resin-supported CuI-cryptand 22 complex: a highly efficient and reusable catalyst for three-component synthesis of 1,4-disubstituted 1,2,3-triazoles under aerobic conditions in water
作者:Barahman Movassagh、Nasrin Rezaei
DOI:10.1016/j.tet.2014.09.092
日期:2014.11
resin-supported copper(I) iodide-cryptand-22 complex (PS–C22–CuI) was synthesized and characterized by FT-IR, EDX, SEM, XPS, and TG-DTA analysis. This complex was found to be a highly active and robust heterogeneous catalyst for either three-component reaction of organic halides, sodium azide, and terminal alkynes, or the reaction of organic azides and alkynes to form 1,4-disubstituted1,2,3-triazoles in good
Copper(II) complex of 1,2-bis(4-pyridylthio)ethane immobilized on polystyrene was a used as a highly stable, active, reusable and green catalyst for click synthesis of 1,2,3-triazoles via one-pot three-component reaction of organic halides, sodium azide and alkynes. The catalyst was characterized by FT-IR spectroscopy, thermogravimetric analysis, elemental analysis, field emission scanning electron