Concise synthesis of the core structures of saundersiosides

Org Lett. 2015 May 15;17(10):2346-9. doi: 10.1021/acs.orglett.5b00821. Epub 2015 May 4.

Abstract

A divergent synthesis of three core pentacyclic lactones of nine rearranged cholestane sapogenins, saundersiosides A-H (1-8) and candicanoside A (9), is reported. Key features include a one-flask CBS reduction/Brown hydroboration-oxidation, a SmI2-mediated intramolecular Reformatskii reaction, and an intramolecular transesterification. This synthesis provides a general strategy and key precursors for the collective synthesis of natural and designed saundersiosides. An efficient formal synthesis of candicanoside A is also achieved.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Models, Molecular
  • Molecular Structure
  • Ornithogalum / chemistry*
  • Sapogenins / chemical synthesis*
  • Sapogenins / chemistry
  • Sapogenins / isolation & purification

Substances

  • Sapogenins