A simple, green and efficient method has been developed for the synthesis of 5-substituted 1H-tetrazole derivatives through [2+3] cycloaddition reaction in good to excellent yields between various benzonitriles and sodium azide. For this purpose, 1-disulfo-[2,2-bipyridine]-1,1-diium chloride ([BiPy](HSO3)2Cl2) system as an ionicliquidcatalyst have been extended for the construction of these valuable
Dendrimer-encapsulated Cu(Π) nanoparticles immobilized on superparamagnetic Fe<sub>3</sub>
O<sub>4</sub>
@SiO<sub>2</sub>
nanoparticles as a novel recyclable catalyst for <i>N</i>
-arylation of nitrogen heterocycles and green synthesis of 5-substituted 1<i>H</i>
-tetrazoles
In this study, dendrimer‐encapsulated Cu(Π) nanoparticlesimmobilized on superparamagnetic Fe3O4@SiO2nanoparticles were prepared via a multistep‐synthesis. Then, the synthesized composite was fully characterized by various techniques such as fourier transform infrared (FT‐IR) spectroscopy, X‐ray diffraction (XRD), dynamic light scattering (DLS), UV‐vis spectroscopy, energy dispersive X‐ray analysis
在这项研究中,通过多步合成法制备了固定在超顺磁性Fe 3 O 4 @SiO 2纳米颗粒上的树枝状聚合物包裹的Cu(Π)纳米颗粒。然后,通过多种技术对合成的复合材料进行全面表征,例如傅立叶变换红外(FT-IR)光谱,X射线衍射(XRD),动态光散射(DLS),紫外可见光谱,能量色散X射线分析( EDX),热重分析(TGA)和振动样品磁力计(VSM)。从获得的信息
Facile synthesis of 1- and 5-substituted 1H-tetrazoles catalyzed by recyclable ligand complex of copper(II) supported on superparamagnetic Fe3O4@SiO2 nanoparticles
coupled plasma (ICP) analyzer. Then, the immobilized copper complex was used as an efficientcatalyst for synthesis of 1- and 5-substituted1H-tetrazolesfromnitriles and amines in good to excellent yields. The results show that the supported catalyst could be conveniently recovered through the use of an external magnetic field and reused for subsequent reactions for at least 6 times with less deterioration
我们报告了一种新的制备具有高饱和磁化强度的超顺磁性Fe 3 O 4 @SiO 2的新方法。通过简单的共沉淀法在水介质中制备磁铁矿颗粒,然后以纳米Fe 3 O 4为核,TEOS为二氧化硅源,聚乙二醇(PEG 1000)为纳米材料,合成Fe 3 O 4 @SiO 2纳米球。表面活性剂。然后,二氧化硅涂覆的Fe 3 O 4纳米粒子被铜(II)的配体络合物覆盖。通过傅立叶变换红外光谱,透射电子显微镜,扫描电子显微镜,X射线衍射,热重分析,动态光散射和N 2吸附/解吸研究了功能化的核壳纳米粒子(MNP)。另外,其铜含量是通过电感耦合等离子体(ICP)分析仪测定的。然后,将固定的铜络合物用作合成1和5取代的1 H的有效催化剂-来自腈和胺的四唑类,收率好至极好。结果表明,可通过使用外部磁场方便地回收负载的催化剂,并将其再用于后续反应至少6次,而催化活性的降低较小。
Cu(<scp>ii</scp>) immobilized on Fe<sub>3</sub>O<sub>4</sub>@APTMS-DFX nanoparticles: an efficient catalyst for the synthesis of 5-substituted 1H-tetrazoles with cytotoxic activity
functionalized magnetic nanoparticles (Cu(II)/Fe3O4@APTMS-DFX) as a novel magnetically recyclable heterogeneouscatalyst is able to catalyze the [3 + 2] cycloaddition reactions of various organic nitriles with sodiumazide. Using this method, a series of 5-substituted-1H-tetrazoles under mild conditions in DMSO were prepared. The reaction involves mild reaction conditions with efficient transformation
Cu(<scp>ii</scp>) immobilized on aminated epichlorohydrin activated silica (CAES): as a new, green and efficient nanocatalyst for preparation of 5-substituted-1H-tetrazoles
作者:Nasrin Razavi、Batool Akhlaghinia
DOI:10.1039/c4ra15148h
日期:——
Reusable nanocatalyst was prepared and characterized an efficient and environmentally benign method of 5-substituted-1H-tetrazole synthesis was introduced.