Chiroselective transcription of the sugar structure to Δ- or Λ-[CoIII(bpy)3]3+ using a boronic acid–sugar template interaction

Abstract

In order to apply boronic acid–saccharide interactions to the chiroselective synthesis of Δ- and Λ-[Co ^III (bpy) ₃ ] ³⁺ a saccharide-binding ligand, 2,2′-bipyridine-4,4′-diboronic acid (bpyba) is newly synthesized; the enantiomeric excess under the optimum reaction conditions reached 79% ee!