Divergent total syntheses of (-)-lycopladine D, (+)-fawcettidine, and (+)-lycoposerramine Q

Org Lett. 2013 Nov 15;15(22):5846-9. doi: 10.1021/ol402906y. Epub 2013 Nov 4.

Abstract

Enantioselective total syntheses of (+)-fawcettidine and (+)-lycoposerramine Q as well as the first total synthesis of (-)-lycopladine D from a common intermediate have been accomplished by a divergent path. The common intermediate was derived from a Hajos-Parrish-like diketone by a stereoselective Birch reduction and a Suzuki coupling. The synthesis of (-)-lycopladine D featured an allylic oxidation and a biomimetic aminoketalization while the route to (+)-fawcettidine and (+)-lycoposerramine Q highlighted an oxidative rearrangement.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkaloids / chemical synthesis*
  • Alkaloids / chemistry
  • Heterocyclic Compounds, 3-Ring
  • Molecular Structure
  • Oxidation-Reduction
  • Sesquiterpenes / chemical synthesis*
  • Sesquiterpenes / chemistry
  • Stereoisomerism

Substances

  • Alkaloids
  • Heterocyclic Compounds, 3-Ring
  • Sesquiterpenes
  • fawcettimine
  • lycopladine D
  • lycoposerramine-Q