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Title

Following Palladium Catalyzed Methoxycarbonylation by Hyperpolarized NMR Spectroscopy: A Parahydrogen Based Investigation

AuthorsGuan, Dexin; Holmes, A. Jonathan; López-Serrano, Joaquín ; Duckett, Simon D.
Issue Date2017
PublisherRoyal Society of Chemistry (UK)
CitationCatalysis Science and Technology, 7: 2101-2109 (2017)
AbstractPd(OTf)2(bcope) is shown to react in methanol solution with diphenylacetylene, carbon monoxide and hydrogen to produce the methoxy-carbonylation product methyl 2,3 diphenyl acrylate alongside cis and trans stilbene. In-situ NMR studies harnessing the parahydrogen induced polarization effect reveal substantially enhanced 1H NMR signals in both protic and aprotic solvents for a series of reaction intermediates that play a direct role in this homogeneous transformation. Exchange Spectroscopy (EXSY) measurements reveal that the corresponding CO adducts are less reactive than their methanol counterparts.
Publisher version (URL)http://doi.org/10.1039/C7CY00252A
URIhttp://hdl.handle.net/10261/177367
DOI10.1039/C7CY00252A
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