| 摘要 |
NEW MATERIAL:A compound of formula I (R<1>-R<5> are each alkyl, cycloalkyl, alkoxy, alkoxyalkyl, alkoxyalkoxyalkyl, hydroxyalkyl, hydroxyalkoxyalkyl, halogenoalkyl, cyanoalkyl, halogen or H). EXAMPLE:1,4-bis(2,4-dimethylanilino)-5,8-dihydroxyanthraquinone. USE:Green coloring matter for optical filters. Excellent in light and heat resistances and spectroscopic characteristics. PREPARATION:A reaction is carried out between a leucotetrahydroxyanthra quinone of formula II and aniline derivative of formula III in the presence of arsenic acid and boric acid.
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