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CH189048A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH189048A
CH189048A CH189048DA CH189048A CH 189048 A CH189048 A CH 189048A CH 189048D A CH189048D A CH 189048DA CH 189048 A CH189048 A CH 189048A
Authority
CH
Switzerland
Prior art keywords
preparation
monoazo dye
dye
diazotized
pyrazolone
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH189048A publication Critical patent/CH189048A/en

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Description

  

  Verfahren zur Herstellung eines     Monoazofarbstoffes.       Gemäss dem im Hauptpatent beschriebenen  Verfahren erhält man einen Wolle in echten  Tönen anfärbenden     Azofarbstoff,    wenn man       Anthranilsäure        diazotiert    und die     Diazover-          bindung    mit einem     Pyrazolon    kuppelt, wel  ches in der     1-Stellung    durch einen     Phenyl-          rest    substituiert ist, der noch durch einen       Sulfamidophenylrest    weiter substituiert ist.  



  Wie nun weiter gefunden wurde, erhält  man einen Farbstoff von ganz ähnlichen  Eigenschaften, wenn man     5-Nitro-2-amino-1-          oxybenzol        diazotiert    und die     Diazoverbindung     mit dem     Pyrazolon    der nachstehenden Formel  kombiniert  
EMI0001.0017     
    <I>Beispiel:

  </I>    154 Gewichtsteile     5-Nitro-2-amino-l-ogy-          benzol    werden in üblicher Weise     diazotiert.     Die abgeschiedene     Diazoverbindung    wird ab  gesaugt, mit Wasser angerührt und. mit einer       sodaalkalischen    Lösung von 344,5 Gewichts  teilen des     Pyrazolons    der Formel  
EMI0001.0024     
    gekuppelt. Der in üblicher Weise isolierte       Farbstoff    liefert nach dem     Einbadchromver-          fahren    blaustichig rote Färbungen auf Wolle  von guten     Allgemeinechtheiten.  



  Process for the preparation of a monoazo dye. According to the process described in the main patent, an azo dye that dyes wool in real shades is obtained if anthranilic acid is diazotized and the diazo compound is coupled with a pyrazolone, which is substituted in the 1-position by a phenyl radical which is also substituted by a sulfamidophenyl radical is further substituted.



  As has now been further found, a dye with very similar properties is obtained if 5-nitro-2-amino-1-oxybenzene is diazotized and the diazo compound is combined with the pyrazolone of the formula below
EMI0001.0017
    <I> example:

  154 parts by weight of 5-nitro-2-amino-1-ogy-benzene are diazotized in the usual way. The deposited diazo compound is filtered off with suction, mixed with water and. with a soda-alkaline solution of 344.5 parts by weight of the pyrazolone of the formula
EMI0001.0024
    coupled. The dye, which is isolated in the customary manner, produces bluish red dyeings on wool with good all-round fastness properties by the single-bath chrome process.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Mono- azofarbstoffes, dadurch gekennzeichnet, dass man 5-Nitro-2-amiiio-l-oxybenzol diazotiert und die Diazoverbindung mit dem Pyrazolon der nachstehenden Formel kuppelt EMI0002.0005 Der Farbstoff färbt Wolle nach dem Einbad chromverfahren in echten blaustichig roten Tönen an. Claim: Process for the preparation of a monoazo dye, characterized in that 5-nitro-2-amiiio-1-oxybenzene is diazotized and the diazo compound is coupled with the pyrazolone of the formula below EMI0002.0005 The dye stains wool in real blue-tinged red tones using the chrome process.
CH189048D 1934-06-29 1935-05-29 Process for the preparation of a monoazo dye. CH189048A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE189048X 1934-06-29
CH185147T 1935-05-29

Publications (1)

Publication Number Publication Date
CH189048A true CH189048A (en) 1937-01-31

Family

ID=25721164

Family Applications (1)

Application Number Title Priority Date Filing Date
CH189048D CH189048A (en) 1934-06-29 1935-05-29 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH189048A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429600A (en) * 1942-09-18 1947-10-28 Ici Ltd Chromable monoazo pyrazolone dye

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429600A (en) * 1942-09-18 1947-10-28 Ici Ltd Chromable monoazo pyrazolone dye

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