Synthesis 2017; 49(13): 2890-2900
DOI: 10.1055/s-0036-1588457
special topic
© Georg Thieme Verlag Stuttgart · New York

On the Oxidation of Hydroxylamines with o-Iodoxybenzoic Acid (IBX)

Authors

  • Camilla Parmeggiani

    a   Dipartimento di Chimica ‘Ugo Schiff’, Università degli Studi di Firenze, via della Lastruccia 3–13, 50019 Sesto Fiorentino, Italy
    b   CNR-INO @ European Laboratory for Non Linear Spectroscopy, Università degli Studi di Firenze, via Nello Carrara 1, 50019 Sesto Fiorentino, Italy   eMail: andrea.goti@unifi.it   eMail: camilla.matassini@unifi.it
  • Camilla Matassini*

    a   Dipartimento di Chimica ‘Ugo Schiff’, Università degli Studi di Firenze, via della Lastruccia 3–13, 50019 Sesto Fiorentino, Italy
  • Francesca Cardona

    a   Dipartimento di Chimica ‘Ugo Schiff’, Università degli Studi di Firenze, via della Lastruccia 3–13, 50019 Sesto Fiorentino, Italy
  • Andrea Goti  *

    a   Dipartimento di Chimica ‘Ugo Schiff’, Università degli Studi di Firenze, via della Lastruccia 3–13, 50019 Sesto Fiorentino, Italy

We thank Università degli Studi di Firenze (Fondi di Ateneo) for financial support and Fondazione Donegani/Accademia dei Lincei for a fellowship to C.M.
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Publikationsverlauf

Received: 10. April 2017

Accepted after revision: 20. Mai 2017

Publikationsdatum:
07. Juni 2017 (online)


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Published as part of the Special Topic Modern Strategies with Iodine in Synthesis

Abstract

o-Iodoxybenzoic acid (IBX) is confirmed as a powerful tool for the oxidation of hydroxylamines. The synthetic route is demonstrated as efficient and user friendly, and is exploited on various carbohydrate-derived N,N-disubstituted hydroxylamines (cyclic, acyclic, and functionalized ones), affording the corresponding nitrones in good yields and regioselectivity. N-Monosubstituted hydroxylamines revealed an interesting divergent behavior depending on the reaction conditions. While IBX oxidation in dimethyl sulfoxide at 45 °C furnished oximes as reported, the oxidation in dichloromethane at room temperature afforded efficiently the unusual corresponding nitroso dimers.

Supporting Information