CH135141A - 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
CH135141A
CH135141A CH135141DA CH135141A CH 135141 A CH135141 A CH 135141A CH 135141D A CH135141D A CH 135141DA CH 135141 A CH135141 A CH 135141A
Authority
CH
Switzerland
Prior art keywords
thionaphthene
preparation
series
dye
indolindigo
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 CH135141A publication Critical patent/CH135141A/en

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Description

  

  Verfahren zur Darstellung eines violetten     Nüpenfarbstoffes    der     2-Thionaphten-          2'-indolindigor        eihe.            Gegpnstand-der    vorliegenden Erfindung ist  ein Verfahren zur Darstellung eines violetten       Iiüpenfarbstoffes    der     2-Tliionaphten-2'-indol-          indigoreihe    der Formel:

    
EMI0001.0009     
    den man durch Kondensation von     5-Chlor-          4.        7-dimethyl-3-oxy-l-thionaThten    mit einer  reaktionsfähigen 5 - Brom - 7 -     methylisatin-          a-verbindung    erhält. Trocken ist der Farb  stoff ein violett gefärbtes Pulver, das in kon  zentrierter Schwefelsäure blaugrün löslich  ist. Mit Natronlauge und     Hydrosulfit    gibt  er eine gelbe     Iiüpe,    aus der die Faser echt  violett angefärbt wird.

      <I>Beispiel:</I>  24 Gewichtsteile     5-Brom-7-methylisatin     werden in etwa 200 Gewichtsteilen Chlor  benzol suspendiert und nach Zusatz von  22 Gewichtsteilen     Phosphorpentachlorid    er  hitzt. Die entstandene Lösung des     5-Brom-          7-methylisatin-a-chlorids    wird in     eine    Lö  sung von 21,2 Gewichtsteilen     5-Chlor-          4.        7-dimethyl-3-oxy-l-thionaphten    in 200 Ge  wichtsteilen Chlorbenzol einlaufen gelassen,  wobei sich .der Farbstoff sofort     .abscheidet.     Nach kurzem Erwärmen auf 80 bis<B>90'</B>       wird,der    Farbstoff filtriert,

   mit Alkohol ge  waschen und getrocknet.



  Process for the preparation of a violet pimple dye of the 2-thionaphtene-2'-indolindigor series. The subject matter of the present invention is a process for the preparation of a violet pulp dye of the 2-thiionaphthene-2'-indole indigo series of the formula:

    
EMI0001.0009
    obtained by condensation of 5-chloro-4, 7-dimethyl-3-oxy-1-thionaThten with a reactive 5-bromine-7-methylisatin-a compound. When dry, the dye is a violet-colored powder that is soluble in concentrated sulfuric acid in a blue-green color. With caustic soda and hydrosulphite, he gives a yellow lip, from which the fiber is stained really purple.

      <I> Example: </I> 24 parts by weight of 5-bromo-7-methylisatin are suspended in about 200 parts by weight of chlorobenzene and, after adding 22 parts by weight of phosphorus pentachloride, it is heated. The resulting solution of 5-bromo-7-methylisatin-a-chloride is allowed to run into a solution of 21.2 parts by weight of 5-chloro-4. 7-dimethyl-3-oxy-l-thionaphthene in 200 parts by weight of chlorobenzene, where .the dye .deposits immediately. After briefly heating to 80 to <B> 90 '</B>, the dye is filtered,

   Washed with alcohol and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen hüpenfarbstofes der 2-Thionaphten-2'-iiidol- indigoreihe der Formel: EMI0002.0001 dadurch gekennzeichnet, da.ss man 5-Chlor- 4. 7-dimethyl-3-oxy-l-thionaphten mit einer reaktionsfähigen 5 - Brom - 7 - methylisatin- a-verbindung kondensiert. PATENT CLAIM: Process for the preparation of a new hüpen dye of the 2-thionaphthene-2'-iiidol indigo series of the formula: EMI0002.0001 characterized in that 5-chloro-4. 7-dimethyl-3-oxy-1-thionaphthene is condensed with a reactive 5-bromine-7-methylisatin-a compound. Trocken ist der Farbstoff ein violettes Pulver, das in kon zentrierter Schwefelsäure mit blaugrüner Farbe löslich ist; mit Natronlauge und Hy- drosulfit bildet er eine gelbe Küpe, aus der die Faser echt violett angefärbt wird. When dry, the dye is a purple powder that is soluble in concentrated sulfuric acid with a blue-green color; with caustic soda and hydrosulphite it forms a yellow vat from which the fiber is dyed really purple.
CH135141D 1927-11-05 1927-12-30 Process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indolindigo series. CH135141A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE135141X 1927-11-05
CH132316T 1927-12-30

Publications (1)

Publication Number Publication Date
CH135141A true CH135141A (en) 1929-08-31

Family

ID=25711849

Family Applications (1)

Application Number Title Priority Date Filing Date
CH135141D CH135141A (en) 1927-11-05 1927-12-30 Process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indolindigo series.

Country Status (1)

Country Link
CH (1) CH135141A (en)

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