Non‐Rusty [2]Catenanes with Huge Rings and Their Polymers

摘要: We describe the design and synthetic realisation of [2]catenanes characterised by having huge rings that can rotate freely shift laterally within constraints concatenation. The strategy, which is based on using a carbonate group as covalent template oxidative dimerization alkynes to achieve ring formation, versatile with respect size presence functional groups. monocyclic constitutional isomer catenane available simple exchange steps in sequence. EPR spectroscopy revealed solution catenanes adopt all possible co-conformations equal abundances. thermotropic liquid crystallinity their corresponding non-intertwined macrocycles proves intermolecular ordering bulk phase. were polymerized through ester formation acyclic diene metathesis. All poly[2] have rather low degrees polymerisation ( approximate 10), possibly because cyclisation occurs. For preparation [n]catenanes n > 3, we propose fusing so crucial threading need only occur during synthesis smallest catenane.