Title: Catalytic Hydrogenolysis of Aromatic Ketones in Mixed Choline–Betainium Ionic Liquids
Authors: Van Doorslaer, Charlie ×
Wahlen, Joos
Mertens, Pascal
Thijs, Ben
Nockemann, Peter
Binnemans, Koen
De Vos, Dirk #
Issue Date: 2008
Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
Series Title: ChemSusChem: Chemistry & Sustainability, Energy & Materials vol:1 issue:12 pages:997-1005
Abstract: The palladium-catalyzed hydrogenolysis of aromatic ketones to alkylbenzenes was studied in mixtures of ionic liquids to explore the promotional effect of these reaction media. Choline-based ionic liquids displayed complete miscibility with the aromatic ketone substrate at reaction temperature and a clear phase separation of the derived alkylbenzene product at room temperature. Selected ionic liquids were then assessed as reaction media in the hydrogenolysis of aromatic ketones over palladium catalysts. A binary mixture of choline and betainium bis(trifluoromethylsulfonyl)imide ionic liquids resulted in the highest conversion and selectivity values in the hydrogenolysis of acetophenone. At the end of the reaction, the immiscible alkylbenzene separates from the ionic liquid mixture and the pure product phase can be isolated by simple decantation. After optimization of the reaction conditions, high yields (>90%) of alkylbenzene were obtained in all cases. The catalyst and the ionic liquid could be used at least three times without any loss of activity or selectivity.
ISSN: 1864-5631
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Design and Synthesis
Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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