Chiral 1,5-disubstituted 1,2,3-triazoles - versatile tools for foldamers and peptidomimetic applications

Org Biomol Chem. 2020 Mar 14;18(10):1957-1967. doi: 10.1039/d0ob00168f. Epub 2020 Feb 26.

Abstract

1,4- and 1,5-Disubstituted triazole amino acid monomers have gained increasing interest among peptidic foldamers, as they are easily prepared via Cu- and Ru-catalyzed click reactions, with the potential for side chain variation. While the latter is key to their applicability, the synthesis and structural properties of the chiral mono- or disubstituted triazole amino acids have only been partially addressed. We here present the synthesis of all eight possible chiral derivatives of a triazole monomer prepared via a ruthenium-catalyzed azide alkyne cycloaddition (RuAAC). To evaluate the conformational properties of the individual building units, a systematic quantum chemical study was performed on all monomers, indicating their capacity to form several low energy conformers. This feature may be used to effect structural diversity when the monomers are inserted into various peptide sequences. We envisage that these results will facilitate new applications for these artificial oligomeric compounds in diverse areas, ranging from pharmaceutics to biotechnology.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkynes / chemistry
  • Azides / chemistry
  • Click Chemistry
  • Cycloaddition Reaction
  • Models, Molecular
  • Peptidomimetics / chemical synthesis*
  • Polymerization
  • Polymers / chemical synthesis
  • Quantum Theory
  • Stereoisomerism
  • Thermodynamics
  • Triazoles / chemical synthesis*

Substances

  • Alkynes
  • Azides
  • Peptidomimetics
  • Polymers
  • Triazoles