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.
The SO3H-tethered imidazolium and triazolium salts, nonvolatile and recyclable Brønstedacidicionicliquids, efficiently mediate intramolecular hydroalkoxylations of alkenyl alcohols. They have been successfully employed in the synthesis of (±)-centrolobine.
SO 3 H系咪唑鎓盐和三唑鎓盐,不挥发且可回收的布朗斯台德酸性离子液体,可有效介导链烯醇的分子内加氢烷氧基化反应。它们已成功地用于合成(±)-中心洛宾。
Synthesis of 1‐Octanol and 1,1‐Dioctyl Ether from Biomass‐Derived Platform Chemicals
作者:Jennifer Julis、Walter Leitner
DOI:10.1002/anie.201203669
日期:2012.8.20
The happy medium: A new catalytic pathway for the synthesis of the linear primary C8 alcohol products 1‐octanol and dioctyl etherfrom furfural and acetone has been developed using retrosynthetic analysis. This opens a general strategy for the synthesis of medium‐chain‐length alcohols from carbohydrate feedstock.
Brønsted acidic ionic liquids, supported on silica gel, have been used effectively in oligomerisation of isobutene. The supported catalysts could be used several times without loss of activity or change in selectivity. The ratio of the products could be influenced by the proper choice of the ionic liquid component of the catalyst and the reaction temperature.
Brönsted Acidic Ionic Liquids as Efficient and Recyclable Catalysts for the Carbonylation of Formaldehyde
作者:Heyuan Song、Zhen Li、Jing Chen、Chungu Xia
DOI:10.1007/s10562-011-0708-x
日期:2012.1
precursor to ethylene glycol (EG), was synthesized by an efficient and eco-friendly procedure of one-pot, two-step, sequential reaction, including carbonylation and esterification from HCHO with Brönsted acidicionicliquids (BAILs) as catalysts. MG was obtained in high yield under mild conditions. In addition, the catalyst could be recycled eight times after separating the unreacted materials and