A novel annelation method is reported for the synthesis of the axial phenolate co-ordinating cyclam (5) from coumarin and linear tetra-amine (3); the product is similar in structure to macrocyclic polyamine alkaloids and is a good ligand for FeII,III in aqueous solution.
E. Kimura, T. Koike and M. Takahashi, J. Chem. Soc., Chem. Commun., 1985, 385 DOI: 10.1039/C39850000385
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