Synlett 2014; 25(4): 591-595
DOI: 10.1055/s-0033-1340471
letter
© Georg Thieme Verlag Stuttgart · New York

Synthetic and Mechanistic Aspects on the Competition between C–H Insertion and Hydride Transfer in Copper-Mediated Transformations of α-Diazo-β-Keto Sulfones

Authors

  • Catherine N. Slattery

    a   Department of Chemistry, Analytical and Biological Research Facility, University College Cork, Cork, Ireland
  • Alan Ford

    a   Department of Chemistry, Analytical and Biological Research Facility, University College Cork, Cork, Ireland
  • Kevin S. Eccles

    b   Department of Chemistry, School of Pharmacy, Synthesis and Solid State Pharmaceutical Centre, Analytical and Biological Research Facility, University College Cork, Cork, Ireland   Fax: +353(21)4274097   eMail: a.maguire@ucc.ie
  • Simon E. Lawrence

    b   Department of Chemistry, School of Pharmacy, Synthesis and Solid State Pharmaceutical Centre, Analytical and Biological Research Facility, University College Cork, Cork, Ireland   Fax: +353(21)4274097   eMail: a.maguire@ucc.ie
  • Anita R. Maguire*

    b   Department of Chemistry, School of Pharmacy, Synthesis and Solid State Pharmaceutical Centre, Analytical and Biological Research Facility, University College Cork, Cork, Ireland   Fax: +353(21)4274097   eMail: a.maguire@ucc.ie
Weitere Informationen

Publikationsverlauf

Received: 06. November 2013

Accepted: 23. November 2013

Publikationsdatum:
08. Januar 2014 (online)


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Abstract

Competition between C–H insertion and hydride transfer is reported for the copper-catalysed reactions of a range of phenyl-substituted α-diazo-β-keto sulfones. Control of chemoselectivity is possible by alteration of the electronic properties of the diazo substrate. The production of enantioenriched cyclopentanones (up to 89% ee), formed via C–H insertion, and alkylidene tetrahydrofurans (up to 43% ee), produced via hydride transfer, is described. The isolation of products derived from hydride transfer provides mechanistic insight into the copper-mediated C–H insertion of α-diazo­carbonyl compounds.

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