CH130087A - 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
- CH130087A CH130087A CH130087DA CH130087A CH 130087 A CH130087 A CH 130087A CH 130087D A CH130087D A CH 130087DA CH 130087 A CH130087 A CH 130087A
- Authority
- CH
- Switzerland
- Prior art keywords
- series
- thionaphthene
- preparation
- violet
- indolindigo
- Prior art date
Links
Landscapes
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Description
Verfahren zur Herstellung eines violetten Nüpenfarbstoffes der 2-Thionaphten-2-indolindigoreihe. Es wurde gefunden, dass man einen neuen violetten Küpenfarbstoff erhält, wenn man 4 . 7-Dimethyl-5-bromoxythioiiaphten mit einem :5-Brom-7-chlorisatin kondensiert, in dessen a-Stellung sich eine labile Gruppe be findet.
Der neue Farbstoff bildet ein violettblaues Pulver, das sich in konzentrierter Schwefel säure mit blaugrüner Farbe löst. Er färbt Baumwolle aus gelber Hydrosulfitkiipe in vio letten Tönen an. Gegenüber den bisher be kannt 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 - bi-omoxythionaphten 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.
<I>Beispiel</I> 26 Gewichtsteile 5 -Brom - 7 - chlorisatin werden in etwa 200 Gewichtsteilen Chlor benzol durch Erwärmen mit 22 Gewichtsteilen Phosphorpentachlorid in das 5-Brom-7-chlori- satin-a-chlorid übergeführt. Diese Lösung wird mit einer Suspension von 35.5 Gewichts teilen 4. 7-Dimethyl-5-brornoxythionaphteri in 200 Gewichtsteile Chlorbenzol vereinigt und einige Geit auf 60-70 erwärmt. Der hierbei entstandene Farbstoff wird filtriert und mit Chlorbenzol, zuletzt mit Sprit gewaschen.
In gleicher Weise kann man das 5-Brom- 7-chlorisatin-ct-anilid zur Kondensation ver wenden.
Process for the production of a violet pimple 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-bromoxythioiiaphten condensed with a: 5-bromo-7-chlorisatin, 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 yellow hydrosulfite pipes 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.
4. 7-Dimethyl-5-bi-omoxythionaphten, 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.
<I> Example </I> 26 parts by weight of 5-bromine-7-chloroisatin are converted into 5-bromo-7-chlorisatin-a-chloride in about 200 parts by weight of chlorobenzene by heating with 22 parts by weight of phosphorus pentachloride. This solution is combined with a suspension of 35.5 parts by weight of 4. 7-dimethyl-5-brornoxythionaphteri in 200 parts by weight of chlorobenzene and heated to 60-70 for a few times. The resulting dye is filtered and washed with chlorobenzene, finally with fuel.
In the same way, you can use the 5-bromo-7-chloroisatin-ct-anilide for the condensation ver.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE130087X | 1926-02-19 | ||
CH127268T | 1927-02-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH130087A true CH130087A (en) | 1928-11-15 |
Family
ID=25710855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH130087D CH130087A (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) | CH130087A (en) |
-
1927
- 1927-02-14 CH CH130087D patent/CH130087A/en unknown
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