Synthesis of cyclic peptide hemicryptophanes: enantioselective recognition of a chiral zwitterionic guest

Chem Commun (Camb). 2013 Oct 4;49(76):8504-6. doi: 10.1039/c3cc44784g.

Abstract

The synthesis of the first members of a new class of cyclic peptide-containing hemicryptophanes is described. Synthesis was achieved through attachment of veratryl groups to the L-tyrosine side chains of a cyclic hexapeptide, c(YG)3, followed by intramolecular cyclodehydration to generate the CTV unit. The diastereomeric P- and M-hemicryptophanes were generated in a 2 : 1 ratio and were separated by chromatography. The enantioselective binding properties of the hemicryptophanes were investigated by complexation with carnitine. Both isomers were found to have significant selectivity for binding (R)-carnitine.

MeSH terms

  • Models, Molecular
  • Molecular Conformation
  • Peptides, Cyclic / chemical synthesis*
  • Peptides, Cyclic / chemistry
  • Polycyclic Compounds / chemical synthesis*
  • Polycyclic Compounds / chemistry
  • Stereoisomerism

Substances

  • Peptides, Cyclic
  • Polycyclic Compounds
  • cryptophane