An eight-step synthesis of epicolactone reveals its biosynthetic origin

Nat Chem. 2015 Nov;7(11):879-82. doi: 10.1038/nchem.2336. Epub 2015 Sep 7.

Abstract

Epicolactone is a recently isolated fungal metabolite that is highly complex for its size, and yet racemic. With its array of quaternary stereocentres, high degree of functionalization and intricate polycyclic structure, it poses a considerable challenge to synthesis, a challenge that can be met by understanding its biosynthetic origin. If drawn in a certain way, epicolactone reveals a pattern that resembles purpurogallin, the archetype of ubiquitous natural colourants formed via oxidative dimerization. Based on this insight, we designed a biomimetic synthesis of epicolactone that proceeds in only eight steps from vanillyl alcohol. We have isolated a key intermediate that supports our biosynthetic hypothesis and anticipate that an isomer of epicolactone stemming from our synthetic efforts could also be found as a natural product.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cycloaddition Reaction
  • Lactones / chemical synthesis*
  • Lactones / chemistry

Substances

  • Lactones

Associated data

  • PubChem-Substance/252163491
  • PubChem-Substance/252163492
  • PubChem-Substance/252163493
  • PubChem-Substance/252163494
  • PubChem-Substance/252163495
  • PubChem-Substance/252163496
  • PubChem-Substance/252163497
  • PubChem-Substance/252163498
  • PubChem-Substance/252163499
  • PubChem-Substance/252163500
  • PubChem-Substance/252163501
  • PubChem-Substance/252163502
  • PubChem-Substance/252163503
  • PubChem-Substance/252163504
  • PubChem-Substance/252163505
  • PubChem-Substance/252163506
  • PubChem-Substance/252163507