PURPOSE: To obtain industrially advantageously the titled compound useful as pigment, etc., by carrying out a two-stage reaction in one reactor, by condensing successively an aromatic dicarboxylic acid with an aromatic diamine and an anthraquinone dicarboxylic acid anhydride.

CONSTITUTION: Firstly, in a polar aprotic solvent, an aromatic dicarboxylic acid (anhydride) shown by the formula I (Y is benzene, naphthalene, etc. which may be replaced) such as phthalic acid, etc., is reacted with 1W1.3 mol aromatic diamine shown by the formula II (R1 and R2 are H, halogen, etc.; n is 1W3 integer) such as p-phenylene-diamine, etc. Then, the prepared condensation reaction mixture is condensed with a compound shown by the formula III (X1WX6 are H, OH, amino whichmay be replaced with 1W3C alkyl, etc., with the proviso that at least one of X1WX3 and X6 is OH or amino which may be replaced with 1W3C alkyl) such as anthraquinone-2, 3-dicarboxylic acid anhydride, etc., to give the aimed compound shown by the formula IV.