Synthesis of novel N- and S-derivatives of 2-naphthol – Promising ligands for the binuclear copper complexes

Abstract

N- And S-ligands for binuclear copper complexes were synthesized by the C-sp2-aminomethylation of 2-naphthol with N,N,N′,N′-tetramethyldiaminomethane giving 1-dimethylaminomethyl-2-naphthol, which then reacted with 1,2-ethanedithiol to be converted to thiomethylated derivative. Direct thiomethylation of 2-naphthol and its acetate with formaldehyde and 1,2-ethanedithiol is nonselective, because the reaction involves both O- and C-sp2 reaction centers of the substrate. Binuclear copper complexes with Cu-O-Cu-N or Cu-Cl-Cu-S bonds were prepared.