CH176362A - Process for the production of an indigoid dye. - Google Patents

Process for the production of an indigoid dye.

Info

Publication number
CH176362A
CH176362A CH176362DA CH176362A CH 176362 A CH176362 A CH 176362A CH 176362D A CH176362D A CH 176362DA CH 176362 A CH176362 A CH 176362A
Authority
CH
Switzerland
Prior art keywords
production
dye
indigoid dye
methyl
oxynaphthalene
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH176362A publication Critical patent/CH176362A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B7/00—Indigoid dyes
    • C09B7/08—Other indole-indigos

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Description

  

  Verfahren zur Herstellung eines     indigolden        Farbstoffes.       Es wurde gefunden, dass man einen     indi-          goiden    Farbstoff erhalten kann, wenn man  die reaktionsfähigen     a-Derivate    des     4-Methyl-          7-chlorisatins    mit     4-Methoxy-l-oxynaphthalin     kondensiert.  



  Der     Farbstoff    der Formel  
EMI0001.0010     
    stellt ein blaues Kristallpulver dar, das sich  in konzentrierter Schwefelsäure mit grüner  Farbe löst und beim Bedrucken der Baum  wolle sehr echte blaue Töne ergibt.  



       Beispiel     19,8 Teile     4-Methyl-7-chlorisatir)    werden  durch einstündiges Erwärmen mit 22 Teilen         Phosphorpentachlorid    und 400     Teilen-    Chlor  benzol auf 95-100   in das     4-Methyl-7-          chlorisatin-a-chlorid    übergeführt und mit einer  bei 45-50   hergestellten Lösung von 18  Teilen     4-Methoxy-l-oxynaphthalin    in 500  Teilen Chlorbenzol vereinigt. Der als blaues  Kristallpulver sich abscheidende Farbstoff  wird filtriert, mit Chlorbenzol, sowie mit  Alkohol gewaschen und getrocknet.  



  Zu demselben Farbstoff gelangt man,  wenn statt in     chlorbenzolischer    Lösung in  wässerigem Medium gearbeitet wird, oder  wenn an Stelle des     4-Methyl-7-chlorisatin-          a-chlorids    das     4-Methyl-7-chlorisatin-a-anilid     mit     4-Methoxy-l-oxynaphthalin    in Essigsäure  anhydrid erhitzt wird.



  Process for the production of an indigolden dye. It has been found that an indigoid dye can be obtained if the reactive α-derivatives of 4-methyl-7-chloroisatin are condensed with 4-methoxy-1-oxynaphthalene.



  The dye of the formula
EMI0001.0010
    represents a blue crystal powder that dissolves in concentrated sulfuric acid with a green color and produces very real blue tones when the cotton is printed.



       EXAMPLE 19.8 parts of 4-methyl-7-chlorisatin) are converted into 4-methyl-7-chlorisatin-a-chloride by heating for one hour with 22 parts of phosphorus pentachloride and 400 parts of chlorobenzene to 95-100 and with a at 45 -50 prepared solution of 18 parts of 4-methoxy-1-oxynaphthalene combined in 500 parts of chlorobenzene. The dye which separates out as blue crystal powder is filtered, washed with chlorobenzene and with alcohol and dried.



  The same dye is obtained when working in an aqueous medium instead of in a chlorobenzene solution, or when 4-methyl-7-chloroisatin-a-anilide with 4-methoxy- l-oxynaphthalene is heated in acetic anhydride.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines indigoider Farbstoffes, dadurch gekennzeichnet, dass man die reaktionsfähigen a-Derivate des 4-Methyl-7-chlorisatins mit 4-Methoxy-l-oxy- naphthalin kondensiert. Der Farbstoff der Formel EMI0002.0003 stellt ein blaues Kristallpulver dar, das sich in konzentrierter Schwefelsäure mit grüner Farbe löst und beim Bedrucken der Baum wolle sehr echte blaue Töne ergibt. PATENT CLAIM: A process for the production of an indigoid dye, characterized in that the reactive α-derivatives of 4-methyl-7-chlorisatin are condensed with 4-methoxy-1-oxynaphthalene. The dye of the formula EMI0002.0003 represents a blue crystal powder that dissolves in concentrated sulfuric acid with a green color and produces very real blue tones when the cotton is printed.
CH176362D 1934-04-20 1934-04-20 Process for the production of an indigoid dye. CH176362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH176362T 1934-04-20

Publications (1)

Publication Number Publication Date
CH176362A true CH176362A (en) 1935-04-15

Family

ID=4426916

Family Applications (1)

Application Number Title Priority Date Filing Date
CH176362D CH176362A (en) 1934-04-20 1934-04-20 Process for the production of an indigoid dye.

Country Status (1)

Country Link
CH (1) CH176362A (en)

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