A concise total synthesis of breitfussin A and B

Org Lett. 2015 Jan 2;17(1):122-5. doi: 10.1021/ol503348n. Epub 2014 Dec 16.

Abstract

The first total synthesis of breitfussin A and B is described. The approach features two palladium-catalyzed cross-couplings installing the indole and pyrrole onto the oxazole core and selective lithiation/iodination of a common indole-oxazole fragment providing 2,4-diiodinated or 2-iodinated oxazoles as potential precursors for breitfussin A and B, respectively. An unexpected acid promoted deiodination was utilized in the synthesis of breitfussin B. Comparison of the synthetic material with previously reported spectral data of isolated breitfussin A and B verified the structure of the breitfussin framework.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Biological Products / chemical synthesis*
  • Biological Products / chemistry
  • Catalysis
  • Hydrocarbons, Brominated / chemical synthesis*
  • Hydrocarbons, Brominated / chemistry
  • Hydrozoa / chemistry
  • Indoles / chemical synthesis*
  • Indoles / chemistry
  • Molecular Structure
  • Nuclear Magnetic Resonance, Biomolecular
  • Oxazoles / chemistry*
  • Pyrroles / chemistry*

Substances

  • Biological Products
  • Hydrocarbons, Brominated
  • Indoles
  • Oxazoles
  • Pyrroles
  • breitfussin A
  • breitfussin B