(Triazinediyl)bis sulfamic acid-functionalized silica-coated magnetite nanoparticles: Preparation, characterization and application as an efficient catalyst for synthesis of mono-, bis-, tris- and spiro-perimidines
作者:Mohammad Ali Bodaghifard、Sajad Asadbegi、Zahra Bahrami
DOI:10.1007/s13738-016-0985-9
日期:2017.2
(Triazinediyl)bis sulfamic acid-functionalized silica-coated magnetite nanoparticles have been prepared and applicated as an efficient catalyst for synthesis of mono-, bis-, tris- and spiro-perimidines. The desired products have been synthesized in high purity and good yields. The workup procedure of reaction is simple. The catalyst was easily separated from the reaction mixture with the assistance
Synthesis of new TCH/Ni‐based nanocomposite supported on SBA‐15 and its catalytic application for preparation of benzimidazole and perimidine derivatives
microscopy, atomic absorption spectroscopy and N2 adsorption–desorption (Brunauer–Emmett–Teller) techniques. The catalytic performance of Ni/TCH@SBA‐15 (NNTS‐15) was determined for the synthesis of 2‐aryl‐substituted benzimidazoles and 2,3‐dihydroperimidines. The excellent yields within shorter reaction times, simplicity of catalytic methods, non‐toxicity and clean reactions, mild reaction conditions and easy
Fe<sub>3</sub>O<sub>4</sub>/SO<sub>3</sub>H@zeolite-Y as a novel multi-functional and magnetic nanocatalyst for clean and soft synthesis of imidazole and perimidine derivatives
作者:Mehdi Kalhor、Zohre Zarnegar
DOI:10.1039/c9ra02910a
日期:——
chlorosulfonic acid with zeolite-NaY undersolvent-freeconditions, which was then supported by Fe3O4 nanoparticles to give SO3H@zeolite-Y (Fe3O4/SO3H@zeolite-Y) magnetic nanoparticles. Several techniques were used to evaluate the physical and chemical characterizations of the zeolitic nanostructures. Fe3O4-loaded sulfonated zeolite was applied as a novel multi-functional zeolite catalyst for the synthesis of
本研究采用氯磺酸与沸石-NaY在无溶剂条件下反应合成SO 3 H@zeolite-Y,然后负载Fe 3 O 4纳米颗粒得到SO 3 H@zeolite-Y(Fe 3 O 4 /SO 3 H@zeolite-Y) 磁性纳米粒子。几种技术用于评估沸石纳米结构的物理和化学特性。铁3 O 4负载磺化沸石作为一种新型多功能沸石催化剂用于合成咪唑和哌啶衍生物。从绿色化学的角度来看,这种高效的方法具有收率好、产品纯度高、纳米催化剂可重复使用、反应条件简单、环境友好和化学过程经济等优点。
Fe3O4@zeolite-SO3H as a magnetically bifunctional and retrievable nanocatalyst for green synthesis of perimidines
作者:Mehdi Kalhor、Zohre Zarnegar、Fatemeh Janghorban、S. Ahmad Mirshokraei
DOI:10.1007/s11164-019-03992-0
日期:2020.1
demonstrated high activity in the catalytic synthesis of perimidine derivatives under solvent-free conditions. Combining the advantages of solid acids based nanocomposites and magnetic separation, this method provides an efficient and much improved modification of the general synthesis of perimidines. Recycling experiments confirmed the good stability of the nanocatalyst for six times and its constant activity
在当前的研究中,介绍了一种新的催化体系,该体系基于固定在沸石-SO 3 H上的Fe 3 O 4纳米粒子(Fe 3 O 4 @沸石-SO 3 H)。在第一阶段中,沸石@ SO 3 H是得自沸石NaY与用氯磺酸来产生zeolo硫酸反应合成。然后,铁3 ö 4 @沸石-SO 3 H为制备 经 官能化沸石的NaY的表面作为支撑上固定的磁性纳米颗粒。Fe 3 O 4 @沸石-SO 3FT-IR,FE-SEM,XRD,EDS,BET和VSM技术将H视为多功能纳米平台系统。该纳米复合材料在无溶剂条件下催化合成亚氨基吡啶衍生物时显示出很高的活性。结合基于固体酸的纳米复合材料和磁性分离的优点,该方法对perimidines的一般合成方法进行了有效且大大改进的修饰。循环实验证实了纳米催化剂具有六次良好的稳定性和恒定的活性。
Fe<sub>3</sub>O<sub>4</sub>@NCs/BF<sub>0.2</sub>: A magnetic bio‐based nanocatalyst for the synthesis of 2,3‐dihydro‐1<i>H</i>‐perimidines
作者:Bi Bi Fatemeh Mirjalili、Mahnaz Imani
DOI:10.1002/jccs.201900004
日期:2019.11
diameters of less than 100 nm are difficult to separate from the reaction mixture, therefore, magnetic nanoparticles (MNPs) were used as catalysts to overcome this problem. Fe3O4@NCs/BF0.2 as a green, bio‐based, eco‐friendly, and recyclable catalyst was synthesized and characterized using fourier‐transform infrared spectroscopy (FT‐IR), vibrating sample magnetometer (VSM), X‐ray diffraction (XRD), X‐ray fluorescence
纳米纤维素(NC)材料具有一些独特的特性,使其成为催化应用中的有机或无机载体具有吸引力。直径小于100 nm的纳米催化剂很难从反应混合物中分离出来,因此,磁性纳米颗粒(MNPs)被用作催化剂来克服这一问题。Fe 3 O 4 @ NCs / BF 0.2是一种绿色,生物基,生态友好且可回收的催化剂,并通过傅里叶变换红外光谱(FT-IR),振动样品磁力计(VSM),X射线进行了表征衍射(XRD),X射线荧光(XRF),Brunauer-Emmett-Teller(BET),场发射扫描电子显微镜(FESEM),透射电子显微镜(TEM)和热重分析(TGA)技术。铁3 O 4 @ NCs / BF 0.2用于在室温下在无溶剂条件下通过1,8-二氨基萘与各种醛的反应合成2,3-二氢-1H-亚氨基im衍生物。本方法具有几个优点,包括反应时间短,产率高,催化剂易于分离和环境友好。