Selective deuteration of heterocycle N-oxides via iridium-catalyzed hydrogen isotope exchange

Owens, Philippa and Smith, Blair and Lindsay, David and Campos, Sebastien and Kerr, William J (2023) Selective deuteration of heterocycle N-oxides via iridium-catalyzed hydrogen isotope exchange. Synthesis, 55 (21). pp. 3644-3651. ISSN 0039-7881 (https://doi.org/10.1055/a-2088-4302)

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Abstract

An iridium(I) N-heterocyclic carbene/phosphine complex has been applied to the C-H activation and hydrogen isotope exchange of quinoline N-oxides. The isotope labelling proceeds under exceptionally low catalyst loadings of 0.25 mol%, and delivers products with high levels of deuterium incorporation selectively at the C8 position. A broad substrate scope is demonstrated, with the method tolerant of electron-poor and -rich substrates, and of substitution adjacent to the site of C-H activation. The isotope label is fully retained under standard deoxygenation conditions to give the corresponding labelled quinoline, and the labelling and deoxygenation can be combined in a one-pot procedure.

Persistent Identifier

https://doi.org/10.17868/strath.00085418
  • Item type:Article
    ID code:85418
    Dates:
    Date
    Event
    8 May 2023
    Published
    8 May 2023
    Published Online
    4 May 2023
    Accepted
    1 March 2023
    Submitted
    Subjects:Science > Chemistry
    Department:Faculty of Science > Pure and Applied Chemistry
    Depositing user: Pure Administrator
    Date deposited:09 May 2023 10:38
    Last modified:18 Apr 2024 08:53
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/85418
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