CH130084A - Process for the preparation of a violet vat dye of the 2-thionaphthene-2-indolindigo series. - Google Patents

Process for the preparation of a violet vat dye of the 2-thionaphthene-2-indolindigo series.

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Publication number
CH130084A
CH130084A CH130084DA CH130084A CH 130084 A CH130084 A CH 130084A CH 130084D A CH130084D A CH 130084DA CH 130084 A CH130084 A CH 130084A
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CH
Switzerland
Prior art keywords
thionaphthene
series
indolindigo
preparation
violet
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 CH130084A publication Critical patent/CH130084A/en

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  Verfahren zur Herstellung eines violetten     güpenfarbstoffes    der       2-Thionaphten-2-indolindigoreilie.       Es wurde gefunden, dass man einen neuen  violetten     güpenfarbstoff    erhält, wenn man       4.7-Dimethyl-5-bromoxythionaphten    mit einem       5.7-Dichlorisatin    kondensiert, in dessen a  Stellung sich eine labile Gruppe befindet.  



  Der neue Farbstoff bildet ein     violettblaues     Pulver, das sich in konzentrierter Schwefel  säure mit     blaugrüner    Farbe löst. Er färbt  Baumwolle aus gelber     Hydrosulfitküpe    in  violetten Tönen an. Gegenüber den bisher  bekannt gewordenen     Farbstoffen    der     2-Thio-          riaphten-2-indolindigoreihe    zeichnet sich der  neue Farbstoff durch Reinheit der Nuance  und bessere     Sodakochechtheit    aus.  



  Das bisher noch nicht beschriebene     4.7-          Dimethyl-5-bromoxythionaphten    kann man  aus dem     1-Amido-4-brom-2.5-xylol    durch  Überführung in die     4-Brom-2.        5-xylol-l-thio-          glykolsäure    und deren     Ringschluss    nach be  kannten Methoden erhalten.         Beispiel:     21,6 Gewichtsteile     5.7-Dichlorisatin    wer  den in etwa<B>100</B> Gewichtsteilen Chlorbenzol  durch Erwärmen mit 22 Gewichtsteilen       Phosphorpentachlorid    in das     5.7-Dichlorisatin-          a-chlorid    übergeführt.

   Diese Lösung wird mit  einer Suspension von 35,7 Gewichtsteilen 4.     7-          Dimethyl-5-bromoxythionaphten    in 200 Ge  wichtsteilen Chlorbenzol vereinigt und einige  Zeit auf 60---70   erwärmt. Der hierbei ent  standene Farbstoff wird filtriert und mit  Chlorbenzol, zuletzt mit Sprit gewaschen.  



  In gleicher Weise kann man das     5.7-          Dichlorisatin-a-anilid    zur Kondensation ver  wenden.



  Process for the production of a violet high quality dye of the 2-thionaphthene-2-indolindigoreilie. It has been found that a new violet liquid dye is obtained if 4,7-dimethyl-5-bromoxythionaphthene is condensed with a 5.7-dichloroisatin in whose a position there is a labile group.



  The new dye forms a purple-blue powder that dissolves in concentrated sulfuric acid with a blue-green color. He dyes cotton from a yellow hydrosulfite vat in purple tones. Compared to the previously known dyes of the 2-thio-riaphten-2-indolindigo series, the new dye is distinguished by its purity of shade and better fastness to soda cooking.



  The 4,7-dimethyl-5-bromo-oxythionaphthene, which has not yet been described, can be obtained from 1-amido-4-bromo-2,5-xylene by converting it into 4-bromo-2. 5-xylene-1-thioglycolic acid and its ring closure obtained by known methods. Example: 21.6 parts by weight of 5.7-dichloroisatin about 100 parts by weight of chlorobenzene are converted into 5.7-dichloroisatin a-chloride by heating with 22 parts by weight of phosphorus pentachloride.

   This solution is combined with a suspension of 35.7 parts by weight of 4,7-dimethyl-5-bromooxythionaphthene in 200 parts by weight of chlorobenzene and heated to 60-70 for some time. The resulting dye is filtered and washed with chlorobenzene and finally with fuel.



  In the same way, you can use the 5.7-dichloroisatin-a-anilide for condensation.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines violetten Küpenfarbstofes der 2-Thionaphten-2-indol- indigoreihe von der Formel: EMI0002.0001 dadurch gekennzeichnet, cdass man 4.7-Dime- thyl-5-bromoxythionaphten mit einem 5.7- Dichlorisatin kondensiert, in dessen a-Stellung sich eine labile Gruppe befindet. Der neue Farbstoff bildet ein violettblaues Pulver, das sich in konzentrierter Schwefel- säure mit blaugrüner Farbe löst. PATENT CLAIM: Process for the preparation of a violet vat dye of the 2-thionaphthene-2-indole indigo series of the formula: EMI0002.0001 characterized in that 4,7-dimethyl-5-bromooxythionaphthene is condensed with a 5.7-dichloroisatin, in whose a-position there is a labile group. The new dye forms a violet-blue powder that dissolves in concentrated sulfuric acid with a blue-green color. Fr färbt Baumwolle und Wolle aus gelber Hydro- sulfitküpe in lebhaften violetten Tönen an. Gegenüber den bisher bekannt gewordenen Farbstoffen der 2-Thionaphten-2-indolindigo- reihe zeichnet der neue Farbstoff sich durch Reinheit der Nuance und bessere Sodakoch- echtheit aus. For dyes cotton and wool from yellow hydrosulfite vat in lively purple tones. Compared to the previously known dyes of the 2-thionaphthene-2-indolindigo series, the new dye is distinguished by its purity of shade and better fastness to soda.
CH130084D 1927-02-14 1927-02-14 Process for the preparation of a violet vat dye of the 2-thionaphthene-2-indolindigo series. CH130084A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH127268T 1927-02-14

Publications (1)

Publication Number Publication Date
CH130084A true CH130084A (en) 1928-11-15

Family

ID=4385808

Family Applications (1)

Application Number Title Priority Date Filing Date
CH130084D CH130084A (en) 1927-02-14 1927-02-14 Process for the preparation of a violet vat dye of the 2-thionaphthene-2-indolindigo series.

Country Status (1)

Country Link
CH (1) CH130084A (en)

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