Total synthesis and biological evaluation of the resveratrol-derived polyphenol natural products hopeanol and hopeahainol A

J Am Chem Soc. 2010 Jun 2;132(21):7540-8. doi: 10.1021/ja102623j.

Abstract

The total synthesis and biological evaluation of the resveratrol-derived natural products hopeanol (2) and hopeahainol A (3) in their racemic and antipodal forms are described. The Friedel-Crafts-based synthetic strategy employed was developed from model studies that established the feasibility of constructing the C(7b) quaternary center through an intramolecular Friedel-Crafts reaction and a Grob-type fragmentation to introduce an obligatory olefinic bond in the growing molecule. The final stages of the synthesis involved an epoxide substrate and an intramolecular Friedel-Crafts reaction, followed by oxidation to afford, upon global deprotection, hopeahainol A (3). The latter was converted under basic conditions to hopeanol (2), whereas the reverse transformation, previously suggested as a step in the biosynthesis of hopeahainol A (3), was not observed under a variety of conditions. Biological evaluation of the synthesized compounds confirmed the reported acetylcholinesterase inhibitory activity of hopeahainol A (3) but not the reported cytotoxic potencies of hopeanol (2).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents / chemical synthesis*
  • Antineoplastic Agents / pharmacology
  • Biological Products / chemical synthesis*
  • Biological Products / pharmacology
  • Cholinesterase Inhibitors / chemical synthesis*
  • Cholinesterase Inhibitors / pharmacology
  • Flavonoids / chemical synthesis*
  • Flavonoids / pharmacology
  • Heterocyclic Compounds, 4 or More Rings / chemical synthesis*
  • Heterocyclic Compounds, 4 or More Rings / pharmacology
  • Phenols / chemical synthesis*
  • Phenols / pharmacology
  • Polyphenols
  • Resveratrol
  • Stilbenes / chemistry*

Substances

  • Antineoplastic Agents
  • Biological Products
  • Cholinesterase Inhibitors
  • Flavonoids
  • Heterocyclic Compounds, 4 or More Rings
  • Phenols
  • Polyphenols
  • Stilbenes
  • hopeahainol A
  • hopeanol
  • Resveratrol