Towards the molecular Borromean link with three unequal rings: double-threaded ruthenium(ii) ring-in-ring complexes
Literature Information
Janis Veliks, Helen M. Seifert, Derik K. Frantz, Jeremy K. Klosterman, Jui-Chang Tseng, Anthony Linden
This study describes synthetic efforts towards the molecular Borromean link consisting of three unequal rings. The design and strategy involve step by step construction of a ruthenium(II) templated ring-in-ring complex doubly threaded with endocyclic ligands ready for the macrocyclization. The control over the topology is achieved by using specially designed directional building blocks based on 2,2′:6′,2′′-terpyridine. Preliminary macrocyclization attempts utilizing the copper-mediated Eglington reaction provide the mass spectrometric evidence consistent with the ruthenium(II) complex of the molecular Borromean link.
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