CH172073A - Process for the preparation of a nitroarylaminoarylamine. - Google Patents
Process for the preparation of a nitroarylaminoarylamine.Info
- Publication number
- CH172073A CH172073A CH172073DA CH172073A CH 172073 A CH172073 A CH 172073A CH 172073D A CH172073D A CH 172073DA CH 172073 A CH172073 A CH 172073A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- nitroarylaminoarylamine
- acid
- dyes
- condensation
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Nitroarylaminoarylamins. Es wurde gefunden, dass man zu wert vollen Nitrofarbstoffen gelangt, wenn man 4-Halogen-3-nitro-l-benzoesäure oder deren Ester oder Amide mit p-Aminodiphenylamin einschliesslich seinerHomologen, Substitutions- produkte und Hydrierungsprodukte konden siert.
Die Farbstoffe färben die tierische Faser in brauneu Tönen an und ergeben, soweit sie keine Sulfogrupperr enthalten, auch kräftige Färbungen auf Zelluloseestern und -äthern.
Die neuen Farbstoffe zeichnen sich in überraschender Weise vor den nach dem Verfahren des deutschen Patentes 504247 aus beispielsweise 4-Halogen-3. 5-dinitro- 1-benzoesäure erhältlichen Dinitrofarbstoffen durch bessere Lichtechtheit aus.
Die Kondensation erfolgt in Wasser oder in organischen Lösungsmitteln oder in Ge mischen beider, mit oder ohne Zusatz von säurebindenden Mitteln nach an sich bekann ten Methoden. Man kann die Herstellung der Farbstoffe auch in der Weise ausführen, dass man zum Beispiel zunächst die p-Aminodi- phenylacylverbindungen der Formel
EMI0001.0021
kondensiert und nach erfolgter Kondensation die Acylgruppe wieder abspaltet. Die Kon densation kann auch unter Druck oder in einem Stickstoffstrom erfolgen.
Gegenstand des vorliegenden Patentes ist Verfahren zur Darstellung eines Nitroaryl- aminoarylamins folgender Konstitution:
EMI0001.0025
welches dadurch gekennzeichnet ist, dass man 4-Chlor-3-rritrobetrzol-l-karbonsaures Nätrium mit 4-Aminodipherrylamin in Gegenwart eines säurebindenden Mittels kondensiert. <I>Beispiel:</I> <B>201,5</B> Gewichtsteile 4-Chlor-3-nitro-l-ben- zolkarbonsäure werden in Wasser und Soda als Natriumsalz gelöst; dazu gibt man 184 Gewichtsteile Aminodiphenylamin und einen Überschuss an Kreide.
Das Gemisch hält man dann unter Rühren bis zur Beendigung der Kondensation im Sieden. Man saugt ab, kocht den Rückstand mit verdünnter Salz säure aus und kristallisiert das- Reaktions produkt in Form des Natriumsalzes aus Wasser um. Der Farbstoff ergibt lichtechte braune Färbungen auf Acetatseide. PATENTANSPRUCH:
Verfahren zur Darstellung eines Nitro- arylaminoarylamins von folgender Konstitu tion
EMI0002.0011
dadurch gekennzeichnet, dass man 4-Chlor-3- nitrobenzol-l-karbonsaures Natrium mit 4- Aminodiphenylamin in Gegenwart eines säure bindenden Mittels kondensiert. Der Farbstoff ergibt lichtechte braune Färbungen auf
Process for the preparation of a nitroarylaminoarylamine. It has been found that valuable nitro dyes are obtained if 4-halo-3-nitro-1-benzoic acid or its esters or amides are condensed with p-aminodiphenylamine, including its homologues, substitution products and hydrogenation products.
The dyes color the animal fibers in brownish tones and, as long as they do not contain sulfo inhibitors, also produce strong colors on cellulose esters and ethers.
The new dyes are surprisingly distinguished from those of the process of German patent 504247, for example 4-halo-3. 5-dinitro-1-benzoic acid available dinitro dyes by better lightfastness.
The condensation takes place in water or in organic solvents or in mixtures of both, with or without the addition of acid-binding agents according to methods known per se. The preparation of the dyes can also be carried out in such a way that, for example, first the p-aminodiphenylacyl compounds of the formula
EMI0001.0021
condenses and after condensation the acyl group is split off again. The condensation can also take place under pressure or in a stream of nitrogen.
The present patent is a process for the preparation of a nitroaryl aminoarylamine of the following constitution:
EMI0001.0025
which is characterized in that 4-chloro-3-ritrobetrzol-1-carboxylic acid sodium is condensed with 4-aminodipherrylamine in the presence of an acid-binding agent. <I> Example: </I> <B> 201.5 </B> parts by weight of 4-chloro-3-nitro-1-benzene carboxylic acid are dissolved in water and soda as the sodium salt; 184 parts by weight of aminodiphenylamine and an excess of chalk are added to this.
The mixture is then kept at the boil with stirring until the condensation has ended. It is filtered off with suction, the residue is boiled with dilute hydrochloric acid and the reaction product is recrystallized in the form of the sodium salt from water. The dye gives light-fast brown dyeings on acetate silk. PATENT CLAIM:
Process for the preparation of a nitroarylaminoarylamine of the following constitution
EMI0002.0011
characterized in that 4-chloro-3-nitrobenzene-1-carboxylic acid sodium is condensed with 4-aminodiphenylamine in the presence of an acid-binding agent. The dye gives light-fast brown colorations
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE172073X | 1932-11-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH172073A true CH172073A (en) | 1934-09-30 |
Family
ID=5689835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH172073D CH172073A (en) | 1932-11-17 | 1933-11-15 | Process for the preparation of a nitroarylaminoarylamine. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH172073A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3153667A (en) * | 1959-09-02 | 1964-10-20 | Du Pont | Process for producing diarylamino aromatic dicarboxylic acids |
-
1933
- 1933-11-15 CH CH172073D patent/CH172073A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3153667A (en) * | 1959-09-02 | 1964-10-20 | Du Pont | Process for producing diarylamino aromatic dicarboxylic acids |
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