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.Info
- 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
- Authority
- CH
- Switzerland
- Prior art keywords
- thionaphthene
- series
- indolindigo
- preparation
- violet
- Prior art date
Links
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- Coloring (AREA)
Description
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)
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) |
-
1927
- 1927-02-14 CH CH130084D patent/CH130084A/en unknown
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