Styrene oxidation by hydrogen peroxide in ionic liquids: the role of the solvent on the competition between two Pd-catalyzed processes, oxidation and dimerization
作者:Cinzia Chiappe、Angelo Sanzone、Paul J. Dyson
DOI:10.1039/c0gc00945h
日期:——
A series of hydrophilic N,N-dimethylpyrrolidinium- and N,N-dimethylpiperidinium-based ionic liquids (ILs) have been prepared and applied as reaction media in the Wacker oxidation of styrene by hydrogenperoxide using PdCl2 as the catalyst. The efficiency of these ILs was compared with hydrophilic and hydrophobic imidazolium systems (including those with nitrile functionalities). The nature of the ionic
Highly Selective Ortho‐Directed Dicarboxylation of Cyclopentadiene by Methylcarbonates and CO
<sub>2</sub>
or COS – First Insight into Co‐ordination Chemistry of New Ambident Ligands
作者:Tobias Vollgraff、Jörg Sundermeyer
DOI:10.1002/chem.202100300
日期:2021.6.10
mechanism where the acidicproton of the monocarboxylic acid intermediate plays an ortho-directing and CO2 activating role for the second kinetically accelerated CO2 addition step exclusively in ortho position. The same and related thiocarboxylates [Cat]2[C5H3(COS)2H] are obtained by reaction of COS with Cat[Cp] (Cat=NR4+, PR4+, Im+). A preliminary study on [Cat]2[C5H3(CO2)2H] reveals, that its soft and hard
Simple access to ionic liquids and organic salts containing the phosphaethynolate (PCO<sup>−</sup>) and Zintl (Sb<sub>11</sub><sup>3−</sup>) anions
作者:Maximilian Jost、Lars H. Finger、Jörg Sundermeyer、Carsten von Hänisch
DOI:10.1039/c6cc06620h
日期:——
A simple and almost quantitative synthesis of the first salts of the PCO− anion with organic cations is presented. Moreover, we discovered a simple synthesis for [P(nBu)3Me]+3[Sb11]3−, the first organic cation salt comprising the Zintl-anion [Sb11]3−.
A process for producing quaternary salts of high purity is disclosed, comprising reacting a tertiary amine or phosphine with a carbonic acid diester to form a corresponding quaternary carbonate and further mixing it with an acid to perform decarboxylation. The quaternary salts thus obtained are useful compounds which can be used in wide fields as various catalysts, electrolytes, additives, medicaments, etc.
Cyclic quaternary ammonium salts as fuel or lubricant additives
申请人:INNOSPEC LIMITED
公开号:US10689589B2
公开(公告)日:2020-06-23
Quaternary ammonium salts of formula: wherein each of R1 and R2 is independently selected from an optionally substituted alkyl, alkenyl or aryl group having less than 8 carbon atoms, R together with N forms an aliphatic or aromatic heterocycle having less than 12 carbons atoms and R5 is hydrogen or an optionally substituted hydrocarbyl group. The use of these compounds as fuel or lubricant additives, especially as diesel fuel additives.