Zur Palladium-katalysierten Dimerisierung von Acrylsäuremethylester

This work describes the optimisation of the palladium catalysed dimerisation reaction of methyle acrylate by using mono- and bidentate ligands and ionic liquids as solvent. Furthermore a biphasic reaction system is developed and applied to a continuos reactor. The activity of the Palladium catalyst increases with higher basicity of the phosphines. The selectivity (linearity of the dimers) decreases by less sterical demand of the lingands. The use of the bidentate ligand 1-dibutylephosphino-2-(dimethyleamino)ethane leads to a high stability of the catalyst and TONs of 4768 are obtained. The addition of ionic liquids with non-coordinating cations and anions e.g. [MePBu3][BF4], [4-MBP][BF4] and [BMIM][BF4] accelerate the reaction. A continuos biphasic reaction can be performed by the use of [BMIM][BF4], which leads to much higher activities compared to the monophasic batch reaction due to a minimisation of product inhibition and an average TOF = 88 h-1 over 43 h is obtained.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2002

Author dc:creator

• Zimmermann, Jörg

Contributors dc:contributor

• Keim, Wilhelm

• info:eu-repo/classification/ddc/540
• Chemie
• Palladium
• Katalyse
• ionic liquids

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-121331%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:59554