Total Synthesis and Stereochemical Confirmation of (-)-Olivil, (+)-Cycloolivil, (-)-Alashinols F and G, (+)-Cephafortin A, and Their Congeners: Filling in Biosynthetic Gaps

Org Lett. 2020 May 1;22(9):3345-3350. doi: 10.1021/acs.orglett.0c00773. Epub 2020 Apr 15.

Abstract

For the first time, we describe the stereocontrolled total syntheses of olivil, cephafortin A, 4-des-O-methyl-4-O-rhamnosyl cephafortin A, and alashinol F from a common precursor using a combination of chemoenzymatic and biomimetic methods for the systematic introduction of functional groups on three vicinal stereogenic carbon atoms. We revised the previously assigned stereochemistry of (+)-cephafortin A, which was reported as the enantiomer. Natural and unnatural congeners provide insights into the biogenetic interrelations of members of this family.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Lignans*
  • Phenols
  • Stereoisomerism

Substances

  • alashinol G
  • cycloolivil
  • Lignans
  • olivil
  • Phenols
  • alashinol F