Synthesis, characterization and heterogeneous catalytic application of a nickel(II) Schiff base complex immobilized on MWCNTs for the Hantzsch four-component condensation
作者:Jamshid Rakhtshah、Sadegh Salehzadeh、Mohammad Ali Zolfigol、Saeed Baghery
DOI:10.1080/00958972.2016.1253068
日期:2017.1.17
highly efficient heterogeneous catalyst was synthesized and characterized by IR, X-ray diffraction patterns, scanning electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma, elemental analysis, and thermal gravimetric analysis. Then a facile and environmentally benign procedure was developed for synthesis of polyhydroquinoline derivatives via Hantzschone-pot condensation
摘要 合成了一种固定在多壁碳纳米管 (MWCNTs) 表面的镍 (II) Schiff 碱配合物作为一种高效的多相催化剂,并通过 IR、X 射线衍射图、扫描电子显微镜、能量色散 X 射线光谱进行表征。 、电感耦合等离子体、元素分析和热重分析。然后,在上述合成催化剂的存在下,在无溶剂条件下,通过芳香醛、1,3-二酮、乙酰乙酸乙酯和乙酸铵的 Hantzsch 一锅缩合反应,开发了一种简便且环境友好的方法合成聚氢喹啉衍生物。该方案具有催化剂稳定性、易得性、可回收性和环保性,实验和后处理程序简单等优点,并且产量也很高。考虑到模型反应的无溶剂条件以及温度、时间和产率,这里报道的纳米催化剂是迄今为止报道的用于合成聚氢喹啉的最佳催化剂之一。
Propylsulfonic Acid-Anchored Isocyanurate-Based Periodic Mesoporous Organosilica (PMO-ICS-PrSO3H): A Highly Efficient and Recoverable Nanoporous Catalyst for the One-Pot Synthesis of Substituted Polyhydroquinolines
作者:Amene Yaghoubi、Mohammad G. Dekamin、Babak Karimi
DOI:10.1007/s10562-017-2159-5
日期:2017.10
Propylsulfonic acid-anchored isocyanurate bridging periodic mesoporous organosilica (PMO-ICS-PrSO3H) was shown to be a highly active and efficient recyclable catalyst for the four-component synthesis of polyhydroquinoline derivatives from dimedone, different aldehydes, ethyl acetoacetate and ammonium acetate under mild reaction conditions in short reaction times and good to excellent yields in EtOH
Synthesis and characterization of novel hercynite@sulfuric acid and its catalytic applications in the synthesis of polyhydroquinolines and 2,3-dihydroquinazolin-4(1<i>H</i>)-ones
作者:Masoud Mohammadi、Arash Ghorbani-Choghamarani
DOI:10.1039/d1ra07381h
日期:——
Herein, we report the synthesis of hercynite@sulfuric acid as a novel nanomagnetic solid acid catalyst, containing the sulfuric acid catalytic sites on the surface of hercynite MNPs as the catalytic support. The as-synthesized nanocomposite was meticulously characterized using a wide range of physicochemical techniques; including, FT-IR, XRD, EDX, X-ray-mapping, SEM and VSM analysis. The catalytic
Complexation of guanidino containing l-arginine with nickel on silica-modified Hercynite MNPs: a novel catalyst for the Hantzsch synthesis of polyhydroquinolines and 2,3-Dihydroquinazolin-4(1H)-ones
作者:Masoud Mohammadi、Arash Ghorbani-Choghamarani
DOI:10.1007/s11164-022-04706-9
日期:2022.6
In this study, a novel amino acid-based Ni complex was immobilized on SiO2-modified Hercynite magneticnanoparticles as the support to prepare the heterogenized guanidino-nickel catalyst (Hercynite@SiO2-l-Arginine-Ni). The uniform surface morphologies of these nanoparticles were characterized using SEM. Thermogravimetric analyses indicated that the [Hercynite@SiO2-l-Arginine-Ni] nanocomposite possessed
本研究将一种新型氨基酸基镍配合物固定在SiO 2修饰的Hercynite磁性纳米颗粒上,制备了异质胍基镍催化剂(Hercynite@SiO 2 - l -Arginine-Ni)。使用 SEM 表征这些纳米颗粒的均匀表面形态。热重分析表明[Hercynite@SiO 2 - l -Arginine-Ni]纳米复合材料具有可靠的热稳定性。使用 X 射线映射和 XRD 表征了镍物质在氨基酸改性的 Hercynite 表面上的均匀分散。催化研究表明,这种异质化的l-Arginine-Ni 磁性配合物对多氢喹啉的不对称 Hantzsch 合成和邻氨基苯甲酰胺与芳香醛的环缩合生成 2,3-dihydroquinazolin-4(1H)-ones 具有高度活性。此外,Hercynite 核的磁性和非均相性质允许通过磁倾析轻松分离催化剂。此外,[Hercynite@SiO 2 - l -Arginine
Synthesis and application of novel urea–benzoic acid functionalized magnetic nanoparticles for the synthesis of 2,3-disubstituted thiazolidin-4-ones and hexahydroquinolines
作者:Fazlulhaq Fazl、Morteza Torabi、Meysam Yarie、Mohammad Ali Zolfigol
DOI:10.1039/d2ra02205b
日期:——
Preparation of hexahydroquinolines and 2,3-disubstituted thiazolidin-4-ones by using Fe3O4@SiO@(CH2)3–urea–benzoic acid as a catalyst.