C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
8/18, 260/172.1,
C09B 56/12 (2006.01) C09B 62/006 (2006.01) D06P 1/06 (2006.01)
Patent
CA 1117105
Abstract of the disclosure: Now water-soluble anthraquinone-azo compounds of the general formula Image and their salts; in this formula the R1s both are sulfo groups, or one of the two is a hydrogen atom and the other is a sulfo group, R is hydrogen or lower alkyl and D, as the radical of a diazo component, is the benzene or naphthalene nucleus, which is monosubstituted or disubstituted by a fiber-reac- tive group Z, corresponding to the index n being 1 or 2, and which furthermore can be substituted by 1 to 3 substi- tuents selected from lower alkyl, lower alkoxy, halogen, nitro and sulfo. The new azo compounds are very suitable as dyestuffs for dyeing fiber materials containing hydroxy groups or carbonamide groups, such as natural or synthetic polyamide fibers or polyurethane fibers and cellulose fibers, yielding deep dyeing and prints with very good - 1a - HOE 78/F 163 fastness properties to wet processing and very good fast- ness properties to light. The new compounds of the above formula are obtained by diazotizing a 1-amino-2-sulfo-4-(4'-aminophenyl)-amino- anthraquinone compound, which is substituted by sulfo in the 2'- and/or 5'-position, by means of an equivalent amount of sodium nitrite in the presence of a mineral acid, coupling this diazonium salt with an acetylsuccinic acid ester of a lower alkanol, cyclizing this radical of the coupling component to the pyrazolone ring and coupling the pyrazolono-phenylamino-anthraquinone compound, thus obtained, with a diazonium compound of an amine of the formula H2N - D - Zn D, Z and n being defined as above. Up to the stage of the coupling reaction with the diazonium compound of the afore- mentioned amine, these reactions can be carried out as a "one-pot" reaction without intermediate isolation of inter- mediate products.
335648
Filzinger Klaus
Fuchs Hermann
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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