CH127449A - Process for the preparation of an indigoid dye. - Google Patents

Process for the preparation of an indigoid dye.

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Publication number
CH127449A
CH127449A CH127449DA CH127449A CH 127449 A CH127449 A CH 127449A CH 127449D A CH127449D A CH 127449DA CH 127449 A CH127449 A CH 127449A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
indigoid dye
indigoid
diketodihydro
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 CH127449A publication Critical patent/CH127449A/en

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Description

  

  Verfahren zur Darstellung eines     indigoiden        Farbstoffes.       Gegenstand dieses Zusatzpatentes ist     ein     Verfahren zur     Darstellung    eines     indigoiden     Farbstoffes durch Kondensation des     4.5.6.7-          Tetrachlor-3-oxy-l-thionaphtens    .der Formel:

    
EMI0001.0008     
    mit     2'-[p-Dimethylamino]-anil    des     4-Brom-          naphtalin-3.    2- (2'.     3'-Diketodihydro-1'-thio-          naphtens).            Beispiel:       26 Gewichtsteile 4. 5. 6.     7-Tetrachlor-3-          Oxy-l-thionaphten    werden in 25 Gewichts  teilen Eisessig mit 35 Gewichtsteilen des 2'  [p-Dimethylamino]-anils des     4-Bromnaphta-          lin-3.    2- (2'.     3'-Diketodihydro-1'-thionaphtens)     von der     Formel:

       
EMI0001.0021     
    unter     Rückiluss    so lange gekocht, bis keine  weitere     Farbstoffbildung    mehr eintritt. Man    kühlt ab und trennt den Farbstoff vom Eis  essig.  



  Der Farbstoff bildet     ein.    violettes Pulver,  das sich in     heisser    konzentrierter Schwefel  säure mit     grüner    Farbe löst.     Er    färbt auf  Baumwolle aus der     güpe    ein Violett.



  Process for the preparation of an indigoid dye. The subject of this additional patent is a process for the preparation of an indigoid dye by condensation of 4.5.6.7-tetrachloro-3-oxy-l-thionaphthene of the formula:

    
EMI0001.0008
    with 2 '- [p-dimethylamino] -anil des 4-bromonaphthalene-3. 2- (2 ', 3'-diketodihydro-1'-thio-naphthene). Example: 26 parts by weight of 4/5/6 7-tetrachloro-3-oxy-1-thionaphthene are mixed in 25 parts by weight of glacial acetic acid with 35 parts by weight of the 2 '[p-dimethylamino] anil of 4-bromonaphthalene-3. 2- (2 '. 3'-Diketodihydro-1'-thionaphtens) of the formula:

       
EMI0001.0021
    Cooked under reflux until no more dye formation occurs. It is cooled and the color is separated from the glacial vinegar.



  The dye forms a. purple powder that dissolves in hot concentrated sulfuric acid with a green color. It dyes a purple on cotton from the güpe.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines indigoi- den Farbstoffes, dadurch gekennzeichnet, dass man 4.5. 6.7-Tetrachlor-3-oxy-l-thio- naphten mit dem 2'-[p-Dimethylamino]-anil des 4-Bromnaphtalin-3. 2"(2' . ,3'-Diketodihy- dro-1'-thionaphtens) kondensiert. Der Farbstoff entspricht der Formel: PATENT CLAIM: A process for the preparation of an indigoid dye, characterized in that 4.5. 6.7-Tetrachloro-3-oxy-1-thio-naphthene with the 2 '- [p-dimethylamino] -anil of 4-bromonaphthalene-3. 2 "(2 '., 3'-Diketodihydro-1'-thionaphtens) condensed. The dye corresponds to the formula: EMI0001.0039 Der Farbstoff bildet ein violettes Pulver, das sich in heisser konzentrierter Schwefel säure mit grüner Farbe löst. Er färbt aus der Küpe auf Baumwolle ein Violett. EMI0001.0039 The dye forms a purple powder that dissolves in hot concentrated sulfuric acid with a green color. He dyes cotton a violet from the vat.
CH127449D 1925-12-04 1926-11-29 Process for the preparation of an indigoid dye. CH127449A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE127449X 1925-12-04
CH123739T 1926-11-29

Publications (1)

Publication Number Publication Date
CH127449A true CH127449A (en) 1928-09-01

Family

ID=25710148

Family Applications (1)

Application Number Title Priority Date Filing Date
CH127449D CH127449A (en) 1925-12-04 1926-11-29 Process for the preparation of an indigoid dye.

Country Status (1)

Country Link
CH (1) CH127449A (en)

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