Chiral dirhodium(II) carboxylates: New insights into the effect of ligand stereo-purity on catalyst structure and enantioselectivity

The current report contributes to the understanding of the stereoselectivity of chiral dirhodium(II) carboxylate catalysts carrying <i>N</i>-protected <i>tert</i>-leucine ligands. Investigating the possible effect of ligand stereo-purity on catalyst structure and enantioselectivity was carried out. This was justified through a new X-ray crystal structure for Rh₂(<i>S</i>,<i>S</i>,<i>S</i>,<i>R</i>-PTTL)₄ diastereomer.