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AssigneeBayer Aktiengesellschaft
InventorsAndreas Gunther, James R. Malone, Manfred Lenthe, Hans-Walter Hohl
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In the preparation of a 2-arylamino-4,6-dichloro-s-triazine of the formula ##STR1## in which R.sup.1 is an optionally substituted aryl radical, and R.sup.2 is hydrogen or alkyl, by reacting cyanuric chloride of the formula ##STR2## with a virtually water-insoluble arylamine of the formula ##STR3## at a temperature between 0.degree. and 100.degree. C., the improvement which comprises effecting the reaction in water at an acid pH in the presence of a virtually water-insoluble organic solvent. The resulting aqueous phase contains the triazine in such high purity and concentration that it can be used without further purification. The organic solvent can be recycled.
In the preparation of a 2-arylamino-4,6-dichloro-s-triazine of the formula ##STR9## in which R.sup.1 is, a carbocyclic aryl radical which is optionally substituted by alkyl with 1 to 6 carbon atoms, nitro, cyano, alkoxy with 1 to 5 carbon atoms, halogen and/or halogenoalkyl with 1 to 5 carbon atoms and 1 to 5 halogen atoms, and
Dependencies are inferred from the claim text.