Process for the manufacture of aminoanthraquinones
AssigneeCiba-Geigy Corporation
InventorZdenek Seha
Life of this patent
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Abstract
A process for the manufacture of aminoanthraquinones, wherein nitroanthraquinones are reacted in dipolar aprotic solvents which contain --SO.sub.2 -- or --SO-- groups and are inert to the reactants, with aliphatic, aliphatic-aromatic, cycloaliphatic, substituted or unsubstituted primary or secondary amines of the formulae R--NH.sub.2 or R--R'--NH, in which R and R' are radicals that are the same or different, such as alkyl, aralkyl, cycloalkyl, hydroxyalkyl radicals of 1 to 8 carbon atoms.
Claims4
A process for the manufacture of aminoanthraquinones, wherein mononitroanthraquinone or dinitroanthraquinone or mononitroanthraquinone or dinitroanthraquinone substituted by alkoxy, carboxyl, sulpho, hydroxy, amino or halogen, is reacted in dipolar aprotic solvents which contain --SO.sub.2 -- or --SO-- groups and are inert to the reactants, with aliphatic, aliphaticaromatic, cycloaliphatic, substituted or unsubstituted primary or secondary amines of the formulae R--NH.sub.2 or R--R'--NH, in which R and R' are radicals that are the same or different alkyl, aralkyl, cycloalkyl, hydroxyalkyl radicals of 1 to 8 carbon atoms.
Dependencies are inferred from the claim text.