Cyclic [2]Catenane Dimers,Trimers, and Tetramers

Dimeric, trimeric, and tetrameric cyclic 2]catenanes have been prepared directly through one‐pot sodium‐ion‐templated dynamic imine formation from a diamine and a tetraaldehyde. NaBH₄ mediated reduction of the labile imino bonds of these cyclic 2]catenane oligomers, followed by methylation of the resulting secondary amino groups enabled the isolation and characterization of oligomeric cyclic 2]catenanes as stable, covalently linked compounds.