Preparation of new, optically active 1,2-ferrocenyldiamine ligands and their application to ruthenium-catalyzed asymmetric transfer hydrogenation of ketones

Article abstract of DOI:10.1002/ejoc.200500660

The treatment of (R,R)-1,2-bis(1-acetoxy-1-phenylmethyl)-ferrocene (1) with azidotrimethylsilane in CH₂Cl₂ in the presence of a catalytic amount of a Lewis acid such as Cu(OTf)₂ or Sc(OTf) ₃, at -40°C for 24 h,