A stereodivergent, two-directional synthesis of stereoisomeric C-linked disaccharide mimetics

Org Biomol Chem. 2003 Jan 21;1(2):338-49. doi: 10.1039/b208781b.

Abstract

Dipyranones, such as 1,2-bis[(2R,3S,6S)-3-hydroxy-6-methoxy-3-oxo-6H-pyran-2-yl]ethane, were exploited as templates for the synthesis of some novel C-linked disaccharide analogues. Efficient methods, such as stereoselective reduction and dihydroxylation, were developed for two-directional functionalisation of these templates. Peracetylated derivatives of ten stereoisomeric disaccharide analogues [acetic acid 4,5-diacetoxy-6-methoxy-[(3',4',5'-triacetoxy-6'-methoxytetrahydropyran- 2'-yl)ethyl]tetrahydropyran-3-yl esters] were synthesised from a virtual library of 136 compounds; furthermore, an additional eight stereoisomers could have been synthesised simply by using the enantiomeric ligand in the enantioselective step. The ability of (2S,3S,4R,5R,6R)-6-methoxy-2-[2'-((2'R,3'R,4'S, 5'R,6'S)-3',4',5'-trihydroxy-6'-methoxytetrahydropyran-2'-yl) ethyl]tetrahydropyran-3,4,5-triol to bind to the repressor protein, LacI, was estimated to be similar to that of isopropyl-beta-thiogalactoside. The disaccharide mimetics were concluded to be a new and interesting class of C-linked disaccharide mimetics with promising, though largely unstudied, biological activity.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Proteins / drug effects
  • Bacterial Proteins / genetics
  • Bacterial Proteins / metabolism
  • Biomimetic Materials / chemical synthesis*
  • Biomimetic Materials / chemistry
  • Biomimetic Materials / metabolism
  • Biomimetic Materials / pharmacology
  • Carbohydrate Conformation
  • Combinatorial Chemistry Techniques*
  • Disaccharides / chemical synthesis*
  • Disaccharides / chemistry
  • Disaccharides / metabolism
  • Disaccharides / pharmacology
  • Hydroxylation
  • Lac Repressors
  • Lactose / analogs & derivatives
  • Lactose / antagonists & inhibitors
  • Magnetic Resonance Spectroscopy
  • Oxidation-Reduction
  • Pyrans / chemistry
  • Repressor Proteins / drug effects
  • Repressor Proteins / genetics
  • Repressor Proteins / metabolism
  • Stereoisomerism
  • Thiogalactosides / chemistry
  • Thiogalactosides / metabolism

Substances

  • Bacterial Proteins
  • Disaccharides
  • Lac Repressors
  • Pyrans
  • Repressor Proteins
  • Thiogalactosides
  • Lactose