Synthetic studies toward Mycobacterium tuberculosis sulfolipid-I

J Org Chem. 2008 Feb 1;73(3):1008-17. doi: 10.1021/jo702032c. Epub 2008 Jan 4.

Abstract

Sulfolipid-I (SL-I) is an abundant metabolite found in the cell wall of Mycobacterium tuberculosis that is comprised of a trehalose 2-sulfate core modified with four fatty acyl substituents. The correlation of its abundance with the virulence of clinical isolates suggests a role for SL-I in pathogenesis, although its biological functions remain unknown. Here we describe the synthesis of a SL-I analogue bearing unnatural lipid substituents. A key feature of the synthesis was application of an intramolecular aglycon delivery reaction to join two differentially protected glucose monomers, one prepared with a novel alpha-selective glycosylation. The route developed for the model compound can be readily extended to the synthesis of native SL-I as well as additional analogues for use in the investigation of SL-I's functions.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acylation
  • Glucose / chemistry
  • Glycolipids / chemical synthesis*
  • Glycolipids / chemistry
  • Models, Chemical
  • Molecular Structure
  • Mycobacterium tuberculosis / chemistry*
  • Trehalose / chemistry
  • Virulence Factors / chemical synthesis*
  • Virulence Factors / chemistry

Substances

  • Glycolipids
  • Virulence Factors
  • sulfolipid I
  • Trehalose
  • Glucose