Supramolecular polymerization of a ureidopyrimidinone-based [2]catenane prepared via ring-closing metathesis.

The synthesis and supramolecular polymerization of a ureidopyrimidinone-based Sauvage-type [2]catenane is reported. The monomer synthesis explores many routes using the elegant metathesis catalysts of Bob Grubbs, yielding a catenane with one ureidopyrimidinone in each cycle. The supramolecular polymer obtained features both mechanical bonds and quadruple hydrogen bonding connections.