Asymmetric Synthesis of (−)-Incarvillateine Employing an Intramolecular Alkylation via Rh-Catalyzed Olefinic C−H Bond Activation

Andy S. Tsai, Robert G. Bergman and Jonathan A. Ellman
Department of Chemistry, University of California, Berkeley, California 94720
J. Am. Chem. Soc., 2008, 130 (20), pp 6316–6317
DOI: 10.1021/ja8012159
Publication Date (Web): April 29, 2008
Copyright © 2008 American Chemical Society

Abstract

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An asymmetric total synthesis of (−)-incarvillateine, a natural product having potent analgesic properties, has been achieved in 11 steps and 15.4% overall yield. The key step is a rhodium-catalyzed intramolecular alkylation of an olefinic C−H bond to set two stereocenters. Additionally, this transformation produces an exocyclic, tetrasubstituted alkene through which the bicyclic piperidine moiety can readily be accessed.

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History

  • Published In Issue May 21, 2008
  • Article ASAPApril 29, 2008
  • Received: February 18, 2008

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