通过在纳米纤维素水悬浮液中原位共沉淀Fe 2+和Fe 3+离子,制备了Fe 3 O 4 @纳米纤维素/Cu( II )作为绿色生物基磁性催化剂。通过FT-IR、XRD、VSM、FESEM、TEM、XRF、EDS和TGA对上述磁性非均相催化剂进行了表征。本研究采用Fe 3 O 4 @纳米纤维素/ Cu ( II) 在 80 °C 无溶剂条件下。该协议的一些优点是产量高、环境友好、易于处理和催化剂的适度可重复使用性。产物结构经FT-IR、1 H NMR和13 C NMR光谱证实。
Nano-Co-[4-chlorophenyl-salicylaldimine-pyranopyrimidine dione]Cl2 as a new Schiff base complex and catalyst for the one-pot synthesis of some 4H-pyrimido[2,1-b]benzazoles
was prepared and fully characterized as a new nano-Schiff base complex. Nano-[Co-4CSP]Cl2 was successfully used as an efficient catalyst for the synthesis of some4H-pyrimido[2,1-b]benzazoles such as 4H-pyrimido[2,1-b]benzothiazoles and 4H-pyrimido[2,1-b]benzimidazoles.
Nano-cellulose/BF3/Fe3O4: a magnetic bio-based nano-catalyst for the synthesis of pyrimido[2,1-b]benzothiazoles under solvent-free conditions
作者:Bi Bi Fatemeh Mirjalili、Fatemeh Aref
DOI:10.1007/s11164-018-3401-5
日期:2018.7
Nano-cellulose/BF3/Fe3O4 is a bio-based and eco-friendly catalyst with high catalytic activity. Easy separation with an external magnet and recyclability without significant loss of its activity are some advantages of this catalyst. Nano-cellulose/BF3/Fe3O4 was characterized by Fourier transform infrared spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray fluorescence, vibrating sample magnetometry, thermogravimetric analysis, and BET theory. The catalyst was applied for the synthesis of 4H-pyrimido[2,1-b]benzothiazole derivatives via one-pot condensation of aldehydes, 2-aminobenzothiazol and ethyl acetoacetate, under solvent-free conditions at 100 °C. This method offers several advantages including easy work-up, excellent yields and short reaction time.
Nicotine‐based ionic liquid supported on magnetic nanoparticles: An efficient and recyclable catalyst for selective one‐pot synthesis of
<i>mono</i>
‐ and
<i>bis</i>
‐4
<i>H</i>
‐pyrimido[2,1‐
<i>b</i>
]benzothiazoles
study, an acidic nicotine‐based ionicliquid supported on magneticnanoparticles ([NicTC]HSO4@MNPs) was synthesized and characterized by different techniques. The activity of this catalyst was evaluated in a multi‐component reaction of 2‐aminobenzothiazole, aldehydes/dialdehydes and β‐ketoesters/1,3‐diketones to afford a series of novel mono‐ and bis‐4H‐pyrimido[2,1‐b]benzothiazole derivatives. In addition
在本研究中,合成了磁性纳米颗粒([NicTC] HSO 4 @MNPs)上的酸性尼古丁离子液体,并通过不同技术对其进行了表征。在2-氨基苯并噻唑,醛/二醛和β-酮酸酯/ 1,3-二酮的多组分反应中评估了该催化剂的活性,得到了一系列新颖的单-和双--4 H-嘧啶基[2,1 [ b ]苯并噻唑衍生物。此外,温和的反应条件,高收率,出色的选择性以及催化剂的易于回收和可重复使用性使该方法成为经济且对环境有益的过程。
Nano-kaolin/Ti<sup>4+</sup>/Fe<sub>3</sub>O<sub>4</sub>: a magnetic reusable nano-catalyst for the synthesis of pyrimido[2,1-<i>b</i>]benzothiazoles
作者:Bi Bi Fatemeh Mirjalili、Roya Soltani
DOI:10.1039/c9ra01767d
日期:——
nano-catalyst was synthesized, and its structuralproperties were characterized using various techniques such as Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), a vibrating sample magnetometer (VSM), thermogravimetric analysis (TGA) and energy-dispersive X-ray spectroscopy (EDX). This catalyst
本文合成了一种新型磁性纳米催化剂纳米高岭土/Ti 4+ /Fe 3 O 4 ,并采用傅里叶变换红外(FTIR)光谱、场发射扫描电子显微镜(FE)等多种技术对其结构性质进行了表征。 -SEM)、透射电子显微镜 (TEM)、X 射线衍射 (XRD)、振动样品磁力计 (VSM)、热重分析 (TGA) 和能量色散 X 射线光谱 (EDX)。该催化剂用于合成嘧啶并[2,1- b ]苯并噻唑2-氨基苯并噻唑、醛和 β-酮酯在 100 °C 无溶剂条件下的一锅缩合反应。这种简单的协议具有许多优点,例如易于处理、产品收率高、反应时间短和催化剂的可重复使用性。
Fe<sub>3</sub>O<sub>4</sub>@nano-cellulose/TiCl: a bio-based and magnetically recoverable nano-catalyst for the synthesis of pyrimido[2,1-b]benzothiazole derivatives
作者:Sara Azad、Bi Bi Fatameh Mirjalili
DOI:10.1039/c6ra13566h
日期:——
nano-catalyst were studied with some different techniques such as Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), X-ray fluorescence (XRF), vibrating sample magnetometry (VSM) and thermo-gravimetric analysis (TGA). The catalyst was found to be active for the synthesis of 4H-pyrimido[2,1-b]benzothiazoles via one-pot three-component
磁性核-壳纳米粒子Fe 3 O 4 @纳米纤维素是通过在纳米纤维素水溶液中通过NH 4 OH原位共沉淀Fe 3+和Fe 2+离子而制备的。用四氯化钛处理Fe 3 O 4纳米纤维素导致Fe 3 O 4的形成纳米纤维素/ TiCl作为新型可回收催化剂。随后,使用诸如傅里叶变换红外(FT-IR)光谱,场发射扫描电子显微镜(FESEM),X射线衍射(XRD)等不同技术研究了制备的纳米催化剂的结构,形态和磁性。 ,X射线荧光(XRF),振动样品磁力分析(VSM)和热重分析(TGA)。发现该催化剂具有活性,可通过以下途径合成4 H-嘧啶并[2,1- b ]苯并噻唑乙醛,乙酰乙酸乙酯和2-氨基苯并噻唑在无溶剂条件下于70°C进行一锅三组分反应。该方法的优点是反应条件温和,后处理容易,产率高,反应时间短,催化剂的磁分离简单以及其可循环利用多达七个循环而没有明显损失效率的优点。