Title: Process for preparing naphtholyene arylimidazol-peri-dicarboxylic acid imides

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Abstract: Process for preparing naphthoylene-arylimidazo-peri-dicarboxylic acid-imide-compounds of the formula ##SPC1## Wherein R.sub.1 is hydrogen, hydroxy or amino, phenyl, alkyl having 1 to 8 carbon atoms, hydroxyalkyl, alkoxyalkyl, amino-alkyl, mono- or dialkylaminoalkyl, hydroxyalkoxyalkyl, alkoxyalkoxyalkyl, carbalkoxyalkyl, carboxylalkyl or phenyl-alkyl having each 1 to 6, preferably 1 to 4 carbon atoms in the alkyl or alkoxy portion and R is hydrogen or halogen, alkyl, alkoxy, carbalkoxy having each 1 to 4 carbon atoms, nitro, cyano, carbonamido, mono- or dialkylcarbonamido or sulfonamido, mono- or dialkylsulfonamido and n represents the integers 1 to 3, in which process naphthalimide-4,5-dicarboxylic acids of the general formula ##SPC2## Or the anhydride thereof are condensed in an aqueous medium with a diamine of the general formula ##SPC3## At temperatures of from 80.degree. to 160.degree.C. R.sub.1, R and n having the above meanings.


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