Bayer Aktiengesellschaft

Walter Kalk

Karl H Schundehutte

Manfred Soll

Hans Samuel Bien

Quaternary compounds of the formula ##STR1## wherein K.sym. denotes a cationic organic radical,

Quaternary reactive compounds

Cationic dyestuffs of the general formula ##STR1## IN WHICH THE SYMBOLS HAVE THE MEANING MENTIONED ABOVE INTERMEDIATES AND PROCESSES FOR THEIR PRODUCTION AND THEIR USE FOR DYEING AND PRINTING OF NATURAL AND SYNTHETIC MATERIALS.

Benzo-[c]-cinnolinium dyestuffs

Process for the preparation of diaryl compounds of the formula ##STR1## by reacting of acylamino-aryl-compounds of the formula ##STR2## WITH ARYL COMPOUNDS OF THE FORMULA ##STR3## IN THE PRESENCE OF METALLIC COPPER OR ITS MIXTURE WITH COPPER SALTS, OPTIONALLY IN THE PRESENCE OF CATALYSTS, IN A SOLVENT WHICH IS INERT UNDER THE REACTION CONDITIONS, AT TEMPERATURES OF 20.degree. TO 200.degree. C. In the formulae A and B represent an aromatic ring system, R represents acyl and X represents a nitro, nitrile, carboxylic ester, acyl or --NH--R group.

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Leverkusen, Germany

Walter Kalk