CH130083A - 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
CH130083A
CH130083A CH130083DA CH130083A CH 130083 A CH130083 A CH 130083A CH 130083D A CH130083D A CH 130083DA CH 130083 A CH130083 A CH 130083A
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CH
Switzerland
Prior art keywords
series
thionaphthene
indolindigo
preparation
violet
Prior art date
Application number
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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 CH130083A publication Critical patent/CH130083A/en

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Description

  

  Verfahren zur Herstellung eines violetten     Küpenfarbstoffes    der       2-Thionaphten-2-indolindigoreihe.       Es wurde gefunden, dass man einen neuen  violetten     Küpenfarbstoff    erhält, wenn man  4.     7-Dimethyl-5-        chloroxythionaphten    mit einem       5.7-Dibromisatin    kondensiert, in dessen a  Stellung sich eine labile Gruppe     befindet.     



  Der neue     Farbstoff    bildet ein     violettblarres     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-          naphten-2-indolindigor-eihe    zeichnet sich der  neue     Farbstoff    aus durch Reinheit der Nuance  und bessere     Sodakochechtheit.     



  Das bisher noch nicht beschriebene 4.7  Dicnethyl-5-chloroxythionaphten kann man aus  dem     1-Amido-4-chlor-2.5-xylol    durch Über  führung in die     4-Chlor-2.5-xylol-l-thioglykol-          säure    und deren     Ringschluss    nach bekannten  Methoden erhalten.    <I>Beispiel:</I>  30,5 Gewichtsteile     5.7-Dibromisatin    wer  den in etwa 300 Gewichtsteilen Chlorbenzol  durch Erwärmen mit 22 Gewichtsteilen     Phos-          phorpentachlorid    in das     5.7-Dibromisatin-a-          chlorid    übergeführt.

   Diese Lösung wird mit  einer Suspension von 21,2 Gewichtsteilen 4.7  Dimethyl-5-chloroxythionaphten in 200 Ge  wichtsteilen Chlorbenzol vereinigt und einige  Zeit auf<B>60-70'</B> erwärmt. Der hierbei ent  standene Farbstoff wird filtriert und mit  Chlorbenzol, zuletzt mit Sprit gewaschen.  



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



  Process for the preparation of a violet vat dye of the 2-thionaphthene-2-indolindigo series. It has been found that a new violet vat dye is obtained if 4. 7-dimethyl-5-chloroxythionaphthene is condensed with a 5.7-dibromoisatin 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. He dyes cotton from a yellow hydrosulfite vat in purple tones. Compared to the previously known dyes of the 2-thionaphthene-2-indolindigor series, the new dye is distinguished by its purity of shade and better fastness to soda cooking.



  The previously not yet described 4.7 diethyl-5-chloroxythionaphthene can be converted from 1-amido-4-chloro-2.5-xylene into 4-chloro-2.5-xylene-1-thioglycolic acid and ring closure by known methods receive. <I> Example: </I> 30.5 parts by weight of 5.7-dibromoisatin are converted into the 5.7-dibromoisatin a-chloride in about 300 parts by weight of chlorobenzene by heating with 22 parts by weight of phosphorus pentachloride.

   This solution is combined with a suspension of 21.2 parts by weight of 4.7 dimethyl-5-chloroxythionaphthene in 200 parts by weight of chlorobenzene and heated to <B> 60-70 '</B> for some time. The resulting dye is filtered and washed with chlorobenzene and finally with fuel.



  In the same way, one can use 5.7 dibromoisatin-a-anilide for condensation.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Darstellung eines violetten Küpenfarbstoffes der 2-'fhionaphten-2-indol- indigoreihe von der Formel EMI0001.0030 EMI0002.0001 dadurch gekennzeichnet, dass man 4. 7-Dime- thyl-5-chloroxythionaphten mit einem 5.7- Dibromisatin 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. <B> PATENT CLAIM: </B> Process for the preparation of a violet vat dye of the 2-'fhionaphten-2-indole-indigo series of the formula EMI0001.0030 EMI0002.0001 characterized in that 4. 7-dimethyl-5-chloroxythionaphthene is condensed with a 5.7-dibromoisatin in the a-position of which. an unstable group is located. The new dye forms a violet-blue powder that dissolves in concentrated sulfuric acid with a blue-green color. Er färbt Baumwolle und Wolle aus gelber Hydrosulfit- küpe in lebhaften violetten Tönen an. Gegen über den bisher bekannt gewordenen Farb stoffen der 2-Thionaphten-2-indolindigoreihe zeichnet der neue Farbstoff sich durch Rein heit der Nuance und bessere Sodakochecht- heit aus. He dyes cotton and wool from a yellow hydrosulfite vat in lively purple tones. Compared to the previously known dyes of the 2-thionaphthene-2-indolindigo series, the new dye is characterized by its purity of shade and better fastness to soda.
CH130083D 1926-02-19 1927-02-14 Process for the preparation of a violet vat dye of the 2-thionaphthene-2-indolindigo series. CH130083A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE130083X 1926-02-19
CH127268T 1927-02-14

Publications (1)

Publication Number Publication Date
CH130083A true CH130083A (en) 1928-11-15

Family

ID=25710852

Family Applications (1)

Application Number Title Priority Date Filing Date
CH130083D CH130083A (en) 1926-02-19 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) CH130083A (en)

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