Peptide-catalyzed kinetic resolution of planar-chiral metallocenesElectronic supplementary information (ESI) available: Experimental procedures and full compound characterization, including NMR spectra and HPLC traces (PDF). CCDC 996655. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c4cc03266g

Kinetic resolution of racemic planar-chiral metallocenes was performed through the conjugate addition of a nucleophile to the enal part of substrates. While no enantiomeric discrimination was found with low-molecular-weight organocatalysts, a properly designed resin-supported peptide catalyzed the reaction in a highly selective manner. Kinetic resolution of racemic planar-chiral metallocenes was performed by a resin-supported peptide catalyst, in which low-molecular-weight organocatalysts were not effective.