Synthesis, Physico‐Chemical and Iron(III)‐Chelating Properties of Novel Hexadentate 3‐Hydroxy‐2(1H)pyridinone Ligands.

Synthesis of hexadentate ligands via the in situ formation of 1-hydroxy benzotriazolyl active ester in the presence of 2-(1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate, TBTU as a coupling agent is described. The pKa values and distribution coefficient values (1-octanol/water) of the ligands and the stability constants of their iron(III) complexes are reported.