6,7-ジク自ルキニザリンからの分散染料

抄録

6, 7-Dichloroquinizarin was synthesized in good yield from 4, 5-dichlorophthalic anhydride and hydroquinone in the presence of sodium aluminum chloride. Disperse dyes of general formula, 1, 4-di (NHR)-6, 7-dichloroanthraquinone (R=H-, CH3-, C₂H₅-, n-C₃H₇-, n-C₄H₉-, n-C₆H₁₃, HOC₂H₄-) were then prepared and their dyeing properties on Tetoron examined. The colors of dyed cloth varied from violet to greenish blue. The dyes with R=H-, CH₃-, C₂H₅- showed good dyeing affinity and that with R=n-C₆H₁₃-, HOC₂H₄- showed good fastness against sublimation. When compared with the corresponding 1, 4-disubstituted anthraquinones, the λ_max of those dyes in ethyl alcohol shifts toward longer wave length, their ε_max is larger, their melting points are higher, and their improved fastness against light and sublimation is also noted.