Anthraquinone compounds
AssigneeCiba-Geigy Corporation
InventorJean-Marie Adam
Life of this patent
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Abstract
There are described new anthraquinone compounds which, in the form of the free acid, correspond to the formula I ##STR1## in which R.sub.1 is a straight-chain or branched-chain alkyl group having 4 to 8 carbon atoms, R.sub.2 and R.sub.3 independently of one another are each a straight-chain or branched-chain alkyl group having 1 to 4 carbon atoms, R.sub.4 is hydrogen, an optionally acylated amino group, or a fibre-reactive radical bound by way of an amino group, and R.sub.5 is hydrogen, or a straight-chain or branched-chain alkyl group having 1 to 4 carbon atoms; and also the production thereof by selective desulfonation from an anthraquinonedisulfonic acid; and the use of the new anthraquinone compounds as dyes for dyeing and printing textile materials.
Claims13
A new anthraquinone compound which, in the form of the free acid, corresponds to the formula I ##STR26## in which R.sub.1 is a straight-chain or branched-chain alkylgroup having 4 to 8 carbon atoms, R.sub.2 and R.sub.3 independently of one another are each a straight-chain or branched-chain alkyl group having 1 4 carbon atoms, R.sub.4 is hydrogen, an optionally acylated amino grup or a fiber-reactive radical bound by way of an amino group, and R.sub.5 is hydrogen, or a straight-chain or branched-chain alkyl group having 1 to 4 carbon atoms.
A process for producing new anthraquinone compounds which, in the form of the free acid, correspond to the formula I ##STR27## in which R.sub.1 is a straigh-chain or branched-chain alkyl group having 4 to 8 carbon atoms, R.sub.2 and R.sub.3 independently of one antoher are each a straight-chain or branched-chain alkyl group having 1 to 4 carbon atoms, R.sub.4 is hydrogen, an optionally acylated amino group, or a fiber-reactive radical bound by way of an amino group, and R.sub.5 is hydrogen, or a straigh-chain or branched-chain alkyl group having 1 to 4 carbon atoms, in which process an anthraquinonedisulfonic acid which, in the form of the free acid, corresponds to the formula II ##STR28## in which the symbols R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 have the aforesaid meanings, is desulfonated selectively in the phenylene ring in the 4-position, and if R.sub.4 is an amino group this is then optionally reacted with a compound introducing an acyl group or a fiber-reactive radical.
Dependencies are inferred from the claim text.