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
Bifunctional Solid Catalyst for Organic Reactions in Water: Simultaneous Anchoring of Acetylacetone Ligands and Amphiphilic Ionic Liquid “Tags” by Using a Dihydropyran Linker
作者:Bingbing Lai、Fuming Mei、Yanlong Gu
DOI:10.1002/asia.201800567
日期:2018.9.4
bifunctional silica‐based solid catalyst that possessed an ionicliquid tail and a metal acetylacetonate moiety was prepared through a mild Lewis‐acid‐catalyzed ring‐opening reaction with a thiol‐functionalized silica. The surfactant‐combined silica‐supported metal acetylacetone catalysts displayed excellent catalytic activity in water for a range of reactions. The solid catalyst was also shown to be recyclable
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.
Synthesis of Propargylamines by Three-Component Coupling of Aldehydes, Amines and Alkynes Catalyzed by Magnetically Separable Copper Ferrite Nanoparticles
An efficient three-component coupling of aldehydes, amines and alkynes has been developed to prepare propargylamines in nearly quantitative yields using magnetically separable copper ferrite nanoparticles as catalyst. Structurally divergent aldehydes and amines were converted into the corresponding propargylamines. The reaction does not require any co-catalyst.
Palladium(II) pyridoxal thiosemicarbazone complexes as efficient and recyclable catalyst for the synthesis of propargylamines by a three‐component coupling reactions in ionic liquids
作者:Rajendran Manikandan、Panneerselvam Anitha、Periasamy Viswanathamurthi、Jan Grzegorz Malecki
DOI:10.1016/j.poly.2016.09.005
日期:2016.11
The palladium(II) complexes ( 1 and 2 ) were obtained from the reaction of [PdCl 2 (PPh 3 ) 2 ] with the tridentate Schiffbaseligands, pyridoxal thiosemicarbazone (L 1 ), and pyridoxal N-methyl thiosemicarbazone (L 2 ), respectively in ethanol. These complexes were characterized by elemental analyses, IR, UV–Vis, 1 H NMR, 31 P NMR and ESI-MS spectroscopy. The molecular structure of the complex [Pd(L
摘要由[PdCl 2(PPh 3)2]与三齿席夫碱配体,吡ido醛硫代半碳酰胺(L 1)和吡pyr醛N-甲基硫代半碳酰胺(L 2)反应制得钯(II)配合物(1和2)。 )分别放在乙醇中。这些配合物的特征在于元素分析,IR,UV-Vis,1 H NMR,31 P NMR和ESI-MS光谱。复合物[Pd(L 2)PPh 3](2)的分子结构是通过单晶X射线衍射确定的,该结构揭示了钯(II)离子周围扭曲的正方形平面几何形状。为了筛选合成的配合物的催化性能,在无溶剂条件下,钯(II)配合物在80°C的离子液体中催化醛,胺和苯乙炔的三组分偶联反应,以高产率合成炔丙基胺。还研究了溶剂,时间,温度,催化剂负载量和取代基对配体部分反应的影响。结果表明,低负载量(1.0 mol%)的负载型催化剂显示出较高的稳定性,也可以回收并至少重复使用5次,而不会显着降低其活性。