负载在氧化石墨烯/ Fe 3 O 4上的钼:一种有效的,可磁分离的催化剂,用于在微波下在深共熔溶剂中一锅构建螺-氧吲哚二氢吡啶
摘要:
磁性可分离的氧化石墨烯负载的钼(Fe 3 O 4/ GO-Mo)纳米粒子的制备和表征,包括X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM),傅里叶变换红外光谱(FT-IR)和振动样品磁强度(VSM)技术。发现合成异质材料在微波辐射下,用氯化胆碱(ChCl)/脲作为绿色溶剂,在靛红,丙二腈和苯胺内酯的一锅,三组分反应中显示出高催化活性。它提供了一种高效,高产率地合成螺并吲哚二氢吡啶的有效方法。催化系统可以成功地重复使用八次,而催化性能的下降很小。
PEG-400 as a nontoxic, green and reusable solvent was used for the synthesis of novel spiro-furo-pyridine-indoline-carbonitriles in the presence of a magnetically recoverable nanocatalyst.
A convenient one-pot protocol was developed for the synthesis of 1H-spiro[furo[3,4-6]pyridine-4,3 '-indoline1-3-carbonitrile derivatives. This reaction was carried out through a three component condensation reaction of isatins, malononitrile, and anilinolactones in the presence of a catalytic amount of Et3N as an inexpensive and available basic catalyst in THF under ultrasound irradiation. The products were obtained in high yields and short reaction times. The main advantage of this synthetic method is that the obtained products in ultrasonic irradiations are different from classical heating. (C) 2014 Elsevier B.V. All rights reserved.
Supported molybdenum on graphene oxide/Fe3O4: An efficient, magnetically separable catalyst for one-pot construction of spiro-oxindole dihydropyridines in deep eutectic solvent under microwave irradiation
Magnetically separable grapheneoxide supported molybdenum (Fe3O4/GO-Mo) nanoparticles were prepared and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), and vibrating sample magnetometry (VSM) techniques. The synthesized heterogeneous material was found to exhibit high catalytic activity
磁性可分离的氧化石墨烯负载的钼(Fe 3 O 4/ GO-Mo)纳米粒子的制备和表征,包括X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM),傅里叶变换红外光谱(FT-IR)和振动样品磁强度(VSM)技术。发现合成异质材料在微波辐射下,用氯化胆碱(ChCl)/脲作为绿色溶剂,在靛红,丙二腈和苯胺内酯的一锅,三组分反应中显示出高催化活性。它提供了一种高效,高产率地合成螺并吲哚二氢吡啶的有效方法。催化系统可以成功地重复使用八次,而催化性能的下降很小。