Preparation of triazinyl-bis-anthraquinone dyes by reacting aryldihalotriazine with amino anthraquinone
AssigneeBASF SE
InventorsReinhard Helwig, Helmut Hoch, Gerhard Epple
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Abstract
Anthraquinone dyes I ##STR1## (Ar = aryl, A = anthraquinonyl) are prepared by reacting a aryldihalotriazine II ##STR2## (Hal = chlorine or bromine) with an aminoanthraquinone III A--NH.sub.2 in an N--C.sub.1 --C.sub.4 -alkylpyrrolid-2-one or -piperid-2-one, N-di-C.sub.1 -C.sub.4 -alkylacetamide or -propionamide or urea derivatives of the formula IV ##STR3## (R = identical or different alkyl groups of from 1 to 4 carbon atoms which can also be linked together to form a 5- or 6-membered ring containing the urea group) as solvent.
Claims4
A process for preparing an anthrquinone dye of the formula ##STR10## where Ar is aryl and the A radicals are each anthraquinonyl, by reacting an aryldihalotriazine of the formula ##STR11## where Hal is chlorine or bromine, with an aminoanthraquinone of the formula
- A--NH.sub.2 [III]
- in an organic solvent selected from the group consisting of N-C.sub.1 -C.sub.4 -alkylpyrrolid-2-one, N-C.sub.1 -C.sub.4 -alkylpiperid-2-one, N-di-C.sub.1 -C.sub.4 -alkylacetamide, N-di-C.sub.1 -C.sub.4 -alkylpropionamide, a urea derivative of the formula ##STR12## where the radicals R are identical or different alkyl groups of from 1 to 4 carbon atoms, 1,3-di-(C.sub.1 -C.sub.4 -alkyl)-imidazolidin-2-one and 1,3-di-(C.sub.1 -C.sub.4 -alkyl)-tetrahydro-2(1H)-pyrimidinone.
Dependencies are inferred from the claim text.