Toward the Total Synthesis of Ryanodol via Oxidative Alkyne-1,3-Diketone Annulation: Construction of a Ryanoid Tetracycle

Org Lett. 2018 Oct 19;20(20):6457-6461. doi: 10.1021/acs.orglett.8b02767. Epub 2018 Sep 28.

Abstract

A synthetic strategy conceived with the intent of establishing a novel approach to the de novo construction of ryanoids is described that is based on a recently developed metallacycle-mediated intramolecular oxidative alkyne-1,3-diketone coupling reaction. In short, a one-pot annulation/oxidation sequence is shown to be capable of establishing a densely oxygenated polycyclic intermediate that could be converted to a composition of matter that contains the ABCD tetracyclic ring system present in the ryanoid family of natural products.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Alkynes / chemistry
  • Biological Products / chemical synthesis
  • Catalysis
  • Coordination Complexes / chemistry
  • Ketones / chemistry
  • Oxidation-Reduction
  • Oxygen / chemistry
  • Polycyclic Compounds / chemical synthesis*
  • Ryanodine / analogs & derivatives*
  • Ryanodine / chemical synthesis

Substances

  • Alkynes
  • Biological Products
  • Coordination Complexes
  • Ketones
  • Polycyclic Compounds
  • ryanodol
  • Ryanodine
  • Oxygen