Diastereoselective Self-Assembly of Double- and Triple-Stranded Helicates from a d-Isomannide Derivative

Difunctionalization of d-isomannide yielded a bis(bipyridine) ligand bearing four stereogenic centers whose diastereoselective self-assembly to enantiomerically pure dinuclear helicates upon coordination to different metal ions was investigated by NMR and CD spectroscopic as well as ESI mass spectrometric methods.