A new route to the synthesis of tetra-azamacrocyclic ligands with a single pendant-arm, including a quinquedentate penta-azamacrocycle with a pendant co-ordinating pyridyl group

A new route is described for the synthesis of tetra-azamacrocycles functionalised with a pendant-arm which can co-ordinate to a centrally placed metal ion; the first example of a macrocycle with a pendant pyridyl group is reported.