Stereoselective Construction of Chiral Linear [3]Catenanes and [2]Catenanes

J Am Chem Soc. 2023 Jan 11;145(1):725-731. doi: 10.1021/jacs.2c12027. Epub 2022 Dec 22.

Abstract

We have successfully constructed a chiral linear [3]catenane stereoselectively by coordination-driven self-assembly using a ditopic monodentate ligand containing l-valine residues with a binuclear half-sandwich organometallic rhodium(III) unit. Furthermore, by increasing the steric hindrance of the amino acid residues in the ligand, a chiral [2]catenane was obtained, which can be regarded as the factor catenane of the chiral linear [3]catenane from a topological viewpoint. Notably, the resulting molecular catenanes all exhibit complex coconformational mechanical helical chirality and planar chirality ascribed to the point chirality of the ligands. Linear [3]catenanes and [2]catenanes with the opposite chirality can be obtained by using ligands containing the corresponding d-amino acid residues, which have been confirmed by single-crystal X-ray diffraction, NMR, mass spectrometry, and circular dichroism spectroscopy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anthracenes
  • Catenanes* / chemistry
  • Crystallography, X-Ray
  • Ligands

Substances

  • Catenanes
  • catenane
  • Ligands
  • Anthracenes