octane (DABCO)-catalyzed Knoevenagel condensation reactions, which showed better catalytic activity compared to other ionic liquid (IL) that had no hydroxyl group attached to the IL scaffold. The effect of hydrogen bond formation between the hydroxyl group of [HyEtPy]Cl and the carbonyl group of aldehyde played an important role in the Knoevenagel condensation reaction. In the [HyEtPy]Cl–H2O–DABCO
New ionic phosphite ligands: synthesis and application in asymmetric Rh-catalyzed hydrogenation
作者:S. E. Lyubimov、P. V. Petrovskii、V. A. Davankov
DOI:10.1007/s11172-009-0051-1
日期:2009.3
A series of chiral ionic phosphite-type ligands bearing pyridinium and imidazolium fragments were prepared. Testing of these ligands in Rh-catalyzedasymmetrichydrogenation of dimethyl itaconate and methyl 2-acetamidoacrylate resulted in 95% ee of the products with 100% conversion of the reactants.
PROCESS FOR PRODUCING ETHYLENE GLYCOL CATALYZED BY IONIC LIQUID
申请人:Zhang Suojiang
公开号:US20130072727A1
公开(公告)日:2013-03-21
Disclosed is a process for producing ethylene glycol catalyzed by an ionic liquid, characterized in that the process includes the following three steps: (a) a carbonylation step of ethylene oxide and CO
2
catalyzed by an ionic liquid composite catalyst comprising a hydroxyl functionalized ionic liquid and an alkali metal salt under an aqueous condition to produce ethylene carbonate and ethylene glycol; (b) a hydrolysis step of reacting the reaction solution containing ethylene carbonate and the ionic liquid composite catalyst obtained in step (a) with water to produce ethylene glycol; (c) a purification step of dehydrating and refining ethylene glycol from the aqueous solution containing ethylene glycol and the catalyst produced in step (b). The present process has the following advantages: the catalyst has high activity, high suitability, and good stability, the reaction condition is wild, the conversion of ethylene oxide is high, the selectivity of ethylene glycol is high, and the process is simple.
THE CHEMISTRY OF ETHYLENE OXIDE: II. THE KINETICS OF THE REACTION OF ETHYLENE OXIDE WITH AMINES IN AQUEOUS SOLUTION
作者:A. M. Eastham、B. deB. Darwent、P. E. Beaubien
DOI:10.1139/v51-067
日期:1951.7.1
kinetics of the reaction of ethylene oxide in dilute aqueous solution at 25°C. with di- and tri-ethylamines, aniline, and pyridine have been investigated over a wide range of hydrogen and hydroxyl ion concentrations. The rates for all four amines were found to be very similar and were accurately expressed by the simple second order equation −d oxide/dl = k(oxide)(amine). The results indicate that basic