Total syntheses of anominine and tubingensin A

J Am Chem Soc. 2012 May 16;134(19):8078-81. doi: 10.1021/ja302765m. Epub 2012 May 2.

Abstract

A divergent strategy for the total syntheses of the indole terpenoid anominine (1) and its natural congener tubingensin A (2) has been developed. The common intermediate 11 bearing all of the required stereogenic centers for both natural products was first assembled by employing a Ueno-Stork radical cyclization and a Sc(OTf)(3)-mediated Mukaiyama aldol reaction to form the key C-C bonds in a stereocontrolled manner. The route to anominine features a radical deoxygenation followed by an efficient side-chain installation, while the path to tubingensin A exploits a CuOTf-promoted 6π-electrocyclization/aromatization sequence to forge the central region of the pentacyclic scaffold.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkenes / chemical synthesis*
  • Alkenes / chemistry
  • Biological Products / chemical synthesis
  • Biological Products / chemistry
  • Carbazoles / chemical synthesis*
  • Carbazoles / chemistry
  • Chemistry Techniques, Synthetic
  • Indoles / chemical synthesis*
  • Indoles / chemistry
  • Models, Molecular
  • Molecular Conformation

Substances

  • Alkenes
  • Biological Products
  • Carbazoles
  • Indoles
  • anominine