Nano magnetite supported metal ions as robust, efficient and recyclable catalysts for green synthesis of propargylamines and 1,4-disubstituted 1,2,3-triazoles in water
Nano magnetite functionalized 2,2′-biimidazole complex of metal ions Cu(I), Cu(II), Ni(II) and Co(II) were successfully synthesized and characterized by different techniques such as elemental analysis, FT-IR spectroscopy, X-ray diffraction (XRD), thermo gravimetric analysis (TGA), transmission electron microscopy (TEM), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM with
Gold immobilized onto poly(ionic liquid) functionalized magnetic nanoparticles: a robust magnetically recoverable catalyst for the synthesis of propargylamine in water
Supported gold(iii) on poly(ionic liquid) coated on magnetic nanoparticles produced a highly active, stable, recoverable and high loading for the synthesis of propargylamines (A3 coupling reaction) under green conditions.
A new, heterogeneous, 4 Å molecular sieve-supported copper(II) catalyst was developed and was used successfully in the A3 coupling of alkynes, aldehydes and amines under simple reaction conditions.
我们开发了一种新型、异质、4 Å 分子筛支撑的铜(II)催化剂,并在简单的反应条件下成功用于炔、醛和胺的 A3 偶联反应。
ZnCl<sub>2</sub> loaded TiO<sub>2</sub> nanomaterial: an efficient green catalyst to one-pot solvent-free synthesis of propargylamines
作者:Digambar B. Bankar、Ranjit R. Hawaldar、Sudhir S. Arbuj、Mansur H. Moulavi、Santosh T. Shinde、Shrikant P. Takle、Manish D. Shinde、Dinesh P. Amalnerkar、Kaluram G. Kanade
DOI:10.1039/c9ra06693d
日期:——
One-pot greensynthesis of propargylamines using ZnCl2 loaded TiO2 nanomaterial under solvent-free conditions has been effectively accomplished. The aromatic aldehydes, amines, and phenylacetylene were reacted at 100 °C in the presence of the resultant catalyst to form propargylamines. The nanocrystalline TiO2 was initially synthesized by a sol–gel method from titanium(IV) isopropoxide (TTIP) and further
已经有效地完成了在无溶剂条件下使用负载ZnCl 2的TiO 2纳米材料的一锅绿色合成炔丙基胺。芳族醛、胺和苯乙炔在所得催化剂存在下在 100°C 下反应形成炔丙基胺。纳米晶 TiO 2最初通过溶胶-凝胶法由异丙醇钛 ( IV ) (TTIP) 合成,然后通过湿浸渍法进一步负载 ZnCl 2 。X 射线衍射 (XRD) 图案显示结晶锐钛矿相 TiO 2的形成. 场发射扫描电子显微镜 (FESEM) 显示形成了尺寸在 25-45 nm 范围内的团聚球形颗粒。透射电子显微镜 (TEM) 验证了纯 TiO 2样品具有清晰刻面边缘的立方体刻面和纳米球状形态特征。在负载ZnCl 2的TiO 2样品的情况下,ZnCl 2在球形TiO 2纳米颗粒上的表面负载是明显的。X 射线光电子能谱 (XPS) 证实负载ZnCl 2的 TiO 2中存在 Ti 4+和 Zn 2+物质催化剂。能量色散 X 射线 (EDS)
Magnetically separable ZnFe2O4 nanoparticles: A low cost and sustainable catalyst for propargyl amine and NH-triazole synthesis
The multicomponentreaction (MCR) strategy for the construction of important molecular scaffolds is in trending nowadays and among them, A3-coupling stands in a significant position. Aldehyde, amine and alkynes are coupled in this particular reaction via C-H activation process. Herein, we have reported zinc ferrite nanoparticles as magnetically separable heterogeneous catalyst for A3-coupling reaction
构建重要分子支架的多组分反应(MCR)策略是当今的趋势,其中A 3 -偶联处于重要地位。醛、胺和炔烃通过 CH 活化过程在该特定反应中偶联。在此,我们报道了铁酸锌纳米颗粒作为 A 3偶联反应的可磁分离多相催化剂,具有出色的生产率、选择性和更好的可重复使用性等吸引人的属性。此外,该催化剂还可以有效地应用于各种NH-三唑类化合物的合成,产品的收率很高。已经提出了合成 NH-三唑的合理机制,然后通过计算研究进行验证。