To obtain the subject compound useful as a dyestuff for a synthetic fiber in optimal reaction time and yield by reacting in the presence of a hydroxycarboxylic acid.
This N,N'-disubstituted 1,4-diaminoanthraquinone is obtained by reacting (B) 1,4-dihydroxyanthraquinone with (C) an aliphatic or an aromatic amine in the presence of (A) a hydroxycarboxylic acid. For example, further, it is preferable that as the component A, an aliphatic hydroxycarboxylic acid, especially hydroxyacetic acid or lactic acid, maleic acid or the like, an aromatic hydroxycarboxylic acid, especially an ortho-hydroxy carboxylic acid of benzene, etc., are used, as the component C, an aromatic amine of the formula [R1, R3, R4 are each a 1-12C alkyl, R2 is H or SO3NHR5 (R5 is an aryl or the like)] is used, and the reaction is performed in the presence of boric acid.
RAINORUTO SHIYUMITSUTSU
KAARUUHAINTSU RAINHARUTO
YOZEFU SHIYUREDAA
SHIYUTEFUAN MIHIYAERISU
