| abstract |
Novel naphthol derivatives, and various azo compounds and metal complexes prepared by using the derivatives are provided. The instant invention provides naphthol derivatives represented by general formula (1); <CHEM> wherein at least one of Y1 and Y2 is a group represented by formula (2); <CHEM> wherein X1 is -O-, -S- or -NH-; and Z is an optionally substituted aromatic group or heterocyclic group having conjugated double bonds, and salts thereof; mono-, bis-, and trisazo compounds prepared from the derivatives; and metal complexes containing the derivatives as the ligand. |