Synthesis of an F-BODIPY [2]catenane using the chemistry of bis(dipyrrinato)metal complexes

Abstract

ML₂ type complexes of an olefin terminated 5H-dipyrrin ligand can be subjected to twofold ring closing metathesis to give bis(dipyrrinato)copper(II) and bis(dipyrrinato)zinc(II) [2]catenates. Demetalation of the copper(II) [2]catenate with KCN/N₂H₄·H₂O gave the corresponding bis(dipyrrin) [2]catenand. The boron difluoride complex of this bis(dipyrrin) was obtained as the first fluorescent F-BODIPY [2]catenane.