Formal Total Syntheses of (+)- and (-)-Aspidophytine from a Common, Homochiral Precursor

J Org Chem. 2022 Nov 4;87(21):14407-14421. doi: 10.1021/acs.joc.2c01864. Epub 2022 Oct 4.

Abstract

A formal total synthesis of (-)-aspidophytine (2), a key substructure associated with the heterodimeric indole alkaloid haplophytine (1) and itself a natural product, has been established by employing the homochiral and enzymatically derived cis-1,2-dihydrocatechol 8 as a starting material. Specifically, compound 8 has been converted into the pentacyclic product 26, an advanced intermediate associated with a previously reported synthesis of aspidophytine (2). Simple modifications to the reaction sequence have also allowed for the identification of a synthetic pathway leading from dihydrocatechol 8 to (+)-aspidophytine (ent-2).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biological Products* / chemistry
  • Heterocyclic Compounds, 4 or More Rings / chemistry
  • Indole Alkaloids*
  • Stereoisomerism

Substances

  • aspidophytine
  • Indole Alkaloids
  • Heterocyclic Compounds, 4 or More Rings
  • Biological Products