CH202860A - Process for the preparation of a dye of the 2-naphthalene-2'-indolindigo series. - Google Patents

Process for the preparation of a dye of the 2-naphthalene-2'-indolindigo series.

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Publication number
CH202860A
CH202860A CH202860DA CH202860A CH 202860 A CH202860 A CH 202860A CH 202860D A CH202860D A CH 202860DA CH 202860 A CH202860 A CH 202860A
Authority
CH
Switzerland
Prior art keywords
dye
series
naphthalene
indolindigo
preparation
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 CH202860A publication Critical patent/CH202860A/en

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Description

  

  Verfahren zur Herstellung eines     Farbstoffes    der     2-Naphthalin-2'-indoUndigo-Reihe.       Es wurde     gefunden,    dass man zu wert  vollen Farbstoffen der     2-Naphthalin-2'-indol-          indigo-Reihe    gelangt, wenn man     N-Alkyl-          oder        N-Aryl-4-ogy-naphthostyrile    mit reak  tionsfähigen     a-Derivaten    der     Isatinreihe    kon  densiert.  



  Die oben     genannten        Derivate    des     4-Ogy-          naphthostyrils    lassen sich zum Beispiel nach  dem Verfahren der Schweizer     Patente     Nr. 194453 und 201173-77 herstellen.  



  Die vorliegenden neuen Farbstoffe färben  die pflanzliche Faser meist in blaugrauen,  blauen bis grünen Farbtönen von guten Echt  heitseigenschaften,     insbesondere    von einer       bemerkenswerten    Lichtechtheit. Durch Nach  halogenieren der Farbstoffe können ihre       färberischen    Eigenschäften in manchen Fäl  len noch     verbessert    werden.  



  Vorliegendes Patent bezieht sich nun auf  ein Verfahren zur     Herstellung    eines Farb  stoffes der 2 - Naphthalin - 2' -     indolindigo-          Reihe,    dadurch gekennzeichnet, dass man 4-         Ogy-N-methyl=naphthostyril    mit einem reak  tionsfähigen     a-Derivat    von 5.     7-Dichlorisatin     kondensiert.  



  Der Farbstoff stellt ein schwärzliches  Pulver dar, das Baumwolle in     grünstichig     marineblauen Tönen färbt     und    druckt. Die  Farbe der     güpe    ist gelbrot, die Lösungsfarbe  in     konzentrierter    Schwefelsäure ist blau.  



       Beispiel:     20 Teile     4-Ogy-N-methyl-naphthostyril     werden     in.        etwa    300 Teilen Chlorbenzol bei  GO bis<B>70'</B> verrührt und mit einer, bei 95 bis  <B>100'</B> aus 25 Teilen 5.     7-Dichlor-isatin,    25  Teilen     Phosphorpentachlorid    und etwa 500       Teilen    Chlorbenzol     hergestellten    Lösung von  5.     7-Dichlor-isatin--a-chlorid    bei 80 bis 85    kondensiert.



  Process for the preparation of a dye of the 2-naphthalene-2'-indoUndigo series. It has been found that valuable dyes of the 2-naphthalene-2'-indole indigo series are obtained if N-alkyl or N-aryl-4-ogy-naphthostyriles with reactive α-derivatives of the isatin series are used condensed.



  The above-mentioned derivatives of 4-ogynaphthostyril can be produced, for example, by the process of Swiss patents 194453 and 201173-77.



  The present new dyes dye the vegetable fiber mostly in blue-gray, blue to green shades of good fastness properties, in particular of a remarkable lightfastness. After halogenating the dyes, their coloring properties can in some cases still be improved.



  The present patent now relates to a process for the production of a dye of the 2 - naphthalene - 2 '- indolindigo series, characterized in that 4-Ogy-N-methyl = naphthostyril with a reactive α-derivative of 5. 7 -Dichloroisatin condensed.



  The dye is a blackish powder that dyes and prints cotton in greenish navy blue tones. The color of the güpe is yellow-red, the solution color in concentrated sulfuric acid is blue.



       Example: 20 parts of 4-ogy-N-methyl-naphthostyril are mixed in about 300 parts of chlorobenzene at GO to <B> 70 '</B> and mixed with one at 95 to <B> 100' </B> 25 parts of 5, 7-dichloro-isatin, 25 parts of phosphorus pentachloride and about 500 parts of chlorobenzene prepared solution of 5, 7-dichloro-isatin-α-chloride at 80 to 85 condensed.

Claims (1)

PATENTANSPRÜCH: Verfahren zur Herstellung eines Farb stoffes der 2-Naphthalin-2'-indolindigo-Reihe, dadurch gekennzeichnet, dass man 4-Ogy-N- methyl - naphthostyril mit einem reaktions fähigen a-Derivat von 5. 7-Dichlorisatin kon densiert. Der Farbstoff stellt ein. schwärzliches Pulver dar, das Baumwolle in grünstichig marineblauen Tönen färbt und druckt.. Die Farbe der Küpe ist gelbrot, die Lösungsfarbe in konzentrierter Schwefelsäure ist blau. PATENT CLAIM: Process for the production of a dye of the 2-naphthalene-2'-indolindigo series, characterized in that 4-Ogy-N-methyl - naphthostyril is condensed with a reactive α-derivative of 5. 7-dichloroisatin condenses. The dye sets. blackish powder that dyes and prints cotton in greenish navy blue tones. The color of the vat is yellow-red, the solution color in concentrated sulfuric acid is blue.
CH202860D 1936-05-19 1937-04-29 Process for the preparation of a dye of the 2-naphthalene-2'-indolindigo series. CH202860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202860X 1936-05-19

Publications (1)

Publication Number Publication Date
CH202860A true CH202860A (en) 1939-02-15

Family

ID=5773581

Family Applications (1)

Application Number Title Priority Date Filing Date
CH202860D CH202860A (en) 1936-05-19 1937-04-29 Process for the preparation of a dye of the 2-naphthalene-2'-indolindigo series.

Country Status (1)

Country Link
CH (1) CH202860A (en)

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