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。
Preparation of an efficient catalyst through injection of CuI on modified poly (styrene‐co‐maleic anhydride) and theoretical investigation of the structural and electronic properties of catalyst
作者:Rozita Zoghi、Majid M. Heravi、Naser Montazeri、Masoud Mohammadi Zeydi、Tayebeh Hosseinnejad
DOI:10.1002/aoc.5435
日期:2020.4
A novel polymer supported [poly (styrene‐co‐maleic imide) (SMI)]Cu(I) nano‐particles was prepared via in situ reaction of 4‐amino‐5‐methyl‐4H‐1,2,4‐triazole‐3‐thione with [poly (styrene‐co‐maleic anhydride)] (SMA) along with immobilization of CuI. These nano‐particles were fully characterized by using scanning electron microscopy (SEM), energy dispersive spectroscopy analysis, Xray (EDAX), inductively
通过4-氨基-5-甲基-4- H -4、1,2,4-三唑的原位反应制备了一种新型的聚合物负载的[聚(苯乙烯-马来酰亚胺)(SMI)] Cu(I)纳米粒子。带有[聚(苯乙烯-马来酸酐)](SMA)的3-硫酮与CuI固定化。通过使用扫描电子显微镜(SEM),能量色散光谱分析,X射线(EDAX),电感耦合等离子体(ICP)分析,1H NMR和FT‐IR技术。此外,使用密度泛函理论计算评估了聚合物负载的铜纳米催化剂复杂模型中金属-配体相互作用的结构和电子特征。这些负载的Cu(I)纳米颗粒的催化活性在最经典的名称反应之一(称为“点击反应”)中进行了检查,该反应被称为K。B Sharpless用于多组分1,2,3-三唑衍生物的区域选择性合成反应(MCR),涉及苄基卤化物,叠氮化钠和末端炔烃在水中作为绿色溶剂。这种非均相催化剂表现出优异的催化活性,可通过简单过滤进行分离,并且至少连续五次使用,其活性没有明显降低。
In situ prepared CuI nanoparticles on modified poly(styrene-co-maleic anhydride): an efficient and recyclable catalyst for the azide–alkyne click reaction in water
作者:Elaheh Hashemi、Yahya S. Beheshtiha、Shervin Ahmadi、Majid M. Heravi
DOI:10.1007/s11243-014-9838-5
日期:2014.8
prepared copper nanoparticles (NPs) on modified poly(styrene-co-maleic anhydride) [SMA] catalyst, is reported. The polymersupport was easily prepared from the reaction of SMA with 4-aminopyridine and subsequently underwent reaction with CuI NPs. The catalyst was applied for the preparation of triazoles under air, followed by chromatographic separation of the products. The polymer-supported catalyst not
一种简便、高产且直接的方法,用于在水中铜催化合成 1,4-二取代 1,2,3-三唑,使用在改性聚(苯乙烯-共-马来酸酐)上原位制备的铜纳米粒子(NP) ) [SMA] 催化剂,据报道。聚合物载体很容易通过 SMA 与 4-氨基吡啶的反应制备,随后与 CuI NPs 反应。该催化剂用于在空气下制备三唑类化合物,然后对产物进行色谱分离。聚合物负载的催化剂不仅表现出高催化活性,而且在作为溶剂的水中 [3 + 2] Huisgen 环加成反应中也表现出高 1,4-区域选择性。在所有情况下都以良好至极好的产率获得产品。催化剂可以在没有预活化的情况下使用并且重新加载至少五次运行而其活性没有显着降低。通过SEM、X射线能谱分析和电感耦合等离子体对催化剂进行表征。
Copper(II) Schiff Base Complexes with Catalyst Property: Experimental, Theoretical, Thermodynamic and Biological Studies
作者:Sheida Esmaielzadeh、Elham Zarenezhad
DOI:10.17344/acsi.2018.4159
日期:2018.6.20
conclusion obtained by the experimental studies. Thermodynamic study of complex formation in solution was carried out spectrophotometrically at 25 °C. These compounds were also subjected to study in vitro antibacterial screening against some bacteria. Also, click reaction was investigated for its catalytic properties. The synthesized Schiff base coppercomplexes catalyzed 1,3-dipolar Huisgen cycloaddition
Immobilized galactose oxidase in alginate gel (GO-Bead): a versatile and efficient biocatalyst for the regioselective synthesis of 1,4-disubstitued-1,2,3-triazoles: click reaction
作者:Fateme Akbari Gourdani、Parinaz Ghadam、Majid M. Heravi、Masoume Malmir
DOI:10.1007/s13738-020-02128-1
日期:2021.6
them to obtain galactose oxidase-bead (GO-Bead). Next, the catalytic activity of galactose oxidase-beads was examined in the one-pot synthesis of 1,4-disubstituted 1,2,3-triazoles via click reaction comprising diversely benzyl halides, sodium azide and different alkynes in aqueous medium which need Cu(I) for their performance. The catalyst was conventionally recovered and effectively reused in several