ChemInform Abstract: Silica-Supported Ionic Liquid Si-[SbSipim][PF6]: An Efficient Catalyst for the Synthesis of 3,4-Dihydropyrimidine-2-(1H)-ones

ChemInform ◽  
2013 ◽  
Vol 44 (40) ◽  
pp. no-no
Author(s):  
Li-Qin Kang ◽  
Dong-Yuan Jin ◽  
Yue-Qin Cai
Keyword(s):  
Ionic Liquid ◽  
Efficient Catalyst ◽  
Supported Ionic Liquid

scholarly journals Immobilized Ionic Liquid-Catalyzed Synthesis of Pyrano[3,2-b]indole Derivatives

2012 ◽  
Vol 9 (3) ◽  
pp. 1490-1493 ◽  
Author(s):  
Saman Damavandi
Keyword(s):  
Ionic Liquid ◽  
Aromatic Aldehydes ◽  
Indole Derivatives ◽  
Efficient Catalyst ◽  
Supported Ionic Liquid

An ionic liquid-catalyzed synthesis of 2-amino-4,5-dihydro-4-arylpyrano[3,2-b]indole-3-carbonitrile derivatives through a novel three-component condensation of 3-hydroxyindole, aromatic aldehydes and malononitrile in the presence of silica supported ionic liquid of [pmim]HSO4SiO2(silica supported 1-methyl-3-(triethoxysilylpropyl)imidazolium hydrogensulfate) as an efficient catalyst is described.

Supported ionic liquid [Bmim]FeCl4/Am TiO2 as an efficient catalyst for the catalytic oxidative desulfurization of fuels

RSC Advances ◽  
2015 ◽  
Vol 5 (54) ◽  
pp. 43528-43536 ◽  
Author(s):  
Suhang Xun ◽  
Wenshuai Zhu ◽  
Dan Zheng ◽  
Hongping Li ◽  
Wei Jiang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Oxidative Desulfurization ◽  
Efficient Catalyst ◽  
Supported Ionic Liquid ◽  
System P ◽  
Catalytic Oxidative Desulfurization ◽  
Desulfurization Efficiency

Supported ionic liquid catalyst [Bmim]FeCl4/Am TiO2 was synthesized and showed excellent desulfurization efficiency and reuseable performance in the ECODS system.

scholarly journals Tuned Bis-Layered Supported Ionic Liquid Catalyst (SILCA) for Competitive Activity in the Heck Reaction of Iodobenzene and Butyl Acrylate

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 963
Author(s):  
Nemanja Vucetic ◽  
Pasi Virtanen ◽  
Ayat Nuri ◽  
Andrey Shchukarev ◽  
Jyri-Pekka Mikkola ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Heck Reaction ◽  
Pd Nanoparticles ◽  
Reaction Conditions ◽  
Efficient Catalyst ◽  
Catalyst Synthesis ◽  
Supported Ionic Liquid ◽  
Ft Ir ◽  
The Stability ◽  
Eventual Loss

A thorough experimental optimization of supported ionic liquid catalyst (SILCA) was performed in order to obtain a stable and efficient catalyst for the Heck reaction. Out of fifteen proposed structures, propyl imidazolium bromide-tetramethylguanidinium pentanoate modified SiO2 loaded with PdCl2 appeared to be the most stable and to have a good activity in the reaction between butylacrylate and iodobezene, resulting in a complete conversion in 40 min at 100 °C, in four consecutive experiments. This study elucidated on the stability of the catalytic system with an ionic liquid layer during the catalyst synthesis but also under reaction conditions. In the bis-layered catalyst, the imidazolium moiety as a part of internal layer, brought rigidity to the structure, while in external layer pentanoic acid gave sufficiently acidic carboxylic group capable to coordinate 1,1,3,3-tetramethylguanidine (TMG) and thus, allow good dispersion of Pd nanoparticles. The catalyst was characterized by means of XPS, FT-IR, TEM, ICP-OES, ζ-potential, EDX, TGA, and 13C NMR. The release and catch mechanism was observed, whereas Pd re-deposition can be hindered by catalyst poisoning and eventual loss of palladium.

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