Pd-catalyzed ethylene methoxycarbonylation with Brønsted acid ionic liquids as promoter and phase-separable reaction media
作者:Eduardo J. García-Suárez、Santosh G. Khokarale、Olivier N. van Buu、Rasmus Fehrmann、Anders Riisager
DOI:10.1039/c3gc41380b
日期:——
Brønsted acid ionic liquids (BAILs) were prepared and applied as combined acidpromoters and reaction media in Pd–phosphine catalyzed methoxycarbonylation of ethylene to produce methyl propionate. The BAILs served as alternatives to common mineral acids required for the reaction, e.g. methanesulfonic acid or sulfuric acid, resulting in high catalytic activity and selectivity towards methyl propionate
A two-phase system for the clean and high yield synthesis of furylmethane derivatives over –SO<sub>3</sub>H functionalized ionic liquids
作者:S. H. Shinde、C. V. Rode
DOI:10.1039/c7gc01654a
日期:——
respective ionic liquids. Among the several preapered ionic liquids, strong acidic imidazolium based butylsulfonic acid (6) showed the best activity with a maximum of 84% yield of condensation product. This strategy offers significantly highyield production of condensation products of furan and furfural as compared to the traditional mineral acid route. The activity and stability of the -SO3H functionalized
PALLADIUM CATALYST SYSTEM COMPRISING ZWITTERION AND/OR ACID-FUNCTIONALYZED IONIC LIQUID
申请人:Riisager Anders
公开号:US20110065950A1
公开(公告)日:2011-03-17
The present invention concerns a catalyst system in particular a catalyst system comprising Palladium (Pd), a zwitterion and/or an acid-functionalized ionic liquid, and one or more phosphine ligands, wherein the Pd catalyst can be provided by a complex precursor, such as Pd(CH
3
COO)
2
, PdCl
2
, Pd(CH
3
COCHCOCH
3
), Pd(CF
3
COO)
2
, Pd(PPh
3
)
4
or Pd
2
(dibenzylideneacetone)
3
. Such catalyst systems can be used for e.g. alkoxycarbonylation reactions, carboxylation reactions, and/or in a co-polymerization reaction, e.g. in the production of methyl propionate and/or propanoic acid, optionally in processes forming methyl methacrylate and/or methacrylic acid. Catalyst systems according to the invention are suitable for reactions forming separable product and catalyst phases and supported ionic liquid phase SILP applications.
Brønsted acid ionic liquid catalyzed formation of pyruvaldehyde dimethylacetal from triose sugars
作者:Shunmugavel Saravanamurugan、Anders Riisager
DOI:10.1016/j.cattod.2012.07.001
日期:2013.2
A series of sulfonic acid functionalized ionic liquids (SO3H-ILs) have been synthesized, characterized and investigated as catalysts for the conversion of the triose sugars, 1,3-dihydroxyacetone (DHA) and glyceraldehyde (GLA), to pyruvaldehyde dimethylacetal (PADA) in methanol. Depending on the reaction conditions and the applied SO3H-ILs a good yield of up to 52% of PADA was obtained. Under identical