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Following palladium catalyzed methoxycarbonylation by hyperpolarized NMR spectroscopy: A: para hydrogen based investigation

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Publication details

JournalCatalysis Science and Technology
DateAccepted/In press - 20 Apr 2017
DateE-pub ahead of print - 21 Apr 2017
DatePublished (current) - 2017
Issue number10
Number of pages9
Pages (from-to)2101-2109
Early online date21/04/17
Original languageEnglish


Pd(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.

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