A concise route to dihydrobenzo[b]furans: formal total synthesis of (+)-lithospermic acid

Org Lett. 2011 Jul 1;13(13):3376-9. doi: 10.1021/ol201130h. Epub 2011 Jun 7.

Abstract

A sequence of Sonogashira coupling, Pd(II)-catalyzed carbonylative annulation, and benzofuran reduction (Mg, MeOH, NH(4)Cl) provides a convergent and modular synthetic route to trans-2-aryl-2,3-dihydrobenzo[b]furan-3-carboxylates, which are a structural feature of numerous biologically active natural products. This versatile strategy was applied to the formal total synthesis of the anti-HIV natural product (+)-lithospermic acid.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anti-HIV Agents / chemical synthesis*
  • Benzofurans / chemical synthesis*
  • Biological Products / chemical synthesis
  • Catalysis
  • Depsides / chemical synthesis*
  • Molecular Structure
  • Oxidation-Reduction
  • Palladium / chemistry

Substances

  • Anti-HIV Agents
  • Benzofurans
  • Biological Products
  • Depsides
  • lithospermic acid
  • Palladium