Synlett 2023; 34(12): 1472-1476
DOI: 10.1055/a-2072-4537
cluster
Special Issue Honoring Masahiro Murakami’s Contributions to Science

Regiodivergent Synthesis of Oxadiazocines via Dirhodium-Catalyzed Reactivity of Oxazolidines and α-Imino Carbenes

Authors

  • Olivier Viudes

    a   Department of Organic Chemistry, University of Geneva, Quai E. Ansermet 30, 1211 Geneva 4, Switzerland
  • Alejandro Guarnieri-Ibáñez

    a   Department of Organic Chemistry, University of Geneva, Quai E. Ansermet 30, 1211 Geneva 4, Switzerland
  • Céline Besnard

    b   Laboratory of Crystallography, University of Geneva, Quai E. Ansermet 24, 1211 Geneva 4, Switzerland
  • Jérôme Lacour

    a   Department of Organic Chemistry, University of Geneva, Quai E. Ansermet 30, 1211 Geneva 4, Switzerland

We thank the Université de Genève and the Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung for financial support (JL: 200020-184843 and 200020-207539).


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Dedicated to Prof. Masahiro Murakami on the occasion of his 65th birthday

Abstract

Using electron-rich or electron-poor N-substituted oxazolidines as substrates, selective formation of either ammonium or oxonium ylides is possible in the presence of α-imino carbenes. As such, treatment of 5-membered oxazolidine precursors with N-sulfonyl-1,2,3-triazoles under dirhodium catalysis (2 mol%) affords the regiodivergent synthesis of either 8-membered 1,3,6- or 1,4,6-oxadiazocines upon the initial N or O reactivity with the carbene.

Supporting Information

Primary Data



Publication History

Received: 24 February 2023

Accepted after revision: 12 April 2023

Accepted Manuscript online:
12 April 2023

Article published online:
31 May 2023

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