New 2-(2-pyridyl)-substituted benzothiazoles with polyethylene glycol substituents

An approach for the synthesis of new organic ligands combining in their structure pyridine, benzothiazole, and polyethylene glycol fragments was developed, proceeding from 6-hydroxy-2-(pyridin-2-yl)benzothiazole and mono- or ditosyl-substituted polyethylene glycols. The ligand 2-(2-{[2-(pyridin-2-yl)benzothiazol-6-yl]oxy}ethoxy)ethanol (L) in the reaction with Cu(ClO4)2•6 H2O and CuCl2•2 H2O formed coordination compounds of the composition L2Cu(ClO4)2•7 H2O and LCuCl2•0.5 H2O, respectively.