Selective Oxidative Carbonylation of Aniline to Diphenylurea with Ionic Liquids

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URI: https://hdl.handle.net/11556/3338
ISSN: 1867-3880
DOI: 10.1002/cctc.201800004
Publication date
2018-06-07
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Abstract
A catalytic system for the selective oxidative carbonylation of aniline to diphenylurea based on Pd complexes in combination with imidazolium ionic liquids is presented. Both oxidants, Pd complexes, and ionic liquids affect the activity of the reaction, and the choice of oxidant determines the selectivity of the reaction. Together they allow the reaction to proceed under comparatively mild conditions without a loss of activity. Examination of the reaction by use of in situ NMR spectroscopy allowed us to observe an intermediate suggested only previously, which supported the proposed mechanism.
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Publisher Copyright: © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Keywords
carbonylation , ionic liquids , oxidation , palladium , reaction mechanisms , Catalysis , Physical and Theoretical Chemistry , Organic Chemistry , Inorganic Chemistry
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journal article
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Zahrtmann , N , Claver , C , Godard , C , Riisager , A & Garcia-Suarez , E J 2018 , ' Selective Oxidative Carbonylation of Aniline to Diphenylurea with Ionic Liquids ' , ChemCatChem , vol. 10 , no. 11 , pp. 2450-2457 . https://doi.org/10.1002/cctc.201800004