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Zwitterion enhanced performance in palladium–phosphine catalyzed ethylene methoxycarbonylation

Paper ID Volume ID Publish Year Pages File Format Full-Text
50260 46786 2014 3 PDF Available
Title
Zwitterion enhanced performance in palladium–phosphine catalyzed ethylene methoxycarbonylation
Abstract

•Zwitterions were used as new promoters in ethylene methoxycarbonylation.•Zwitterions enhanced Pd–TPP catalyst performance in methyl propionate production.•The presence of zwitterions contributes to stabilize transition states and Pd intermediates.

Zwitterions were used for the first time as promoters in ethylene methoxycarbonylation for the production of methyl propionate. They were found to improve the catalytic performance of the Pd–phosphine system. The presence of zwitterions could contribute to stabilize transition states and active catalytic Pd intermediates. The beneficial effect of the zwitterions was found to be most pronounced, when low amount of a strong acid (MeSO3H) was used with respect to palladium (below 2 equiv.). Under these conditions, phosphine ligand alkylation and reaction vessel corrosion are also anticipated to be less severe.

Keywords
Ethylene; Methoxycarbonylation; Methyl propionate; Palladium; Triphenylphosphine; Zwitterions
First Page Preview
Zwitterion enhanced performance in palladium–phosphine catalyzed ethylene methoxycarbonylation
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 44, 10 January 2014, Pages 73–75
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis