CH120710A - Process for the preparation of monobromoisodibenzanthrone. - Google Patents

Process for the preparation of monobromoisodibenzanthrone.

Info

Publication number
CH120710A
CH120710A CH120710DA CH120710A CH 120710 A CH120710 A CH 120710A CH 120710D A CH120710D A CH 120710DA CH 120710 A CH120710 A CH 120710A
Authority
CH
Switzerland
Prior art keywords
bzl
preparation
benzanthronyl
sulfide
monobromoisodibenzanthrone
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 CH120710A publication Critical patent/CH120710A/en

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  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung von     1Ylonobromisoclibenzanthron.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung von     Monobrom-          isodibenzanthron.       Das Verfahren besteht darin, dass man       Monobrom-Bzl,        Bz1'-benzantlironylsulfid    fol  gender Formel:  
EMI0001.0006     
    mit alkalischen     Kondensationsmitteln,    insbe  sondere alkoholischem Alkali,     behandelt.     



  <I>Beispiel</I>  15 Gewichtsteile     Monobrom-Bzl,        Bzl'-          benzanthronylsulfid    (erhalten durch     Mono-          bromieren    von     Bzl,        Bzl'-benzanthronylsulfid     in geeigneten Lösungsmitteln) werden bei  120' mit 90     Gewichtsteilen        Atzkali    und  75 Gewichtsteilen Äthylalkohol bis zur Be  endigung der     Reaktion    verschmolzen. Die  Schmelze     wird    mit Wasser .aufgenommen  und Luft eingeleitet, solange noch Farbstoff  in Form der     Leukoverbindung    vorhanden ist.

      Man filtriert und wäscht gut mit. Wasser  aus. Der erhaltene Farbstoff ist ein dunkel  violettes     Pülver,    das sich in     konzentrierter     Schwefelsäure mit grüner Farbe löst und  Baumwolle aus blauer     Hydrosulfitküpe     kräftig violett färbt.   An Stelle von Äthylalkohol kann man  auch andere Alkohole, an Stelle von Kali  hydrat andere     Ätzalkalien        verwenden.  



  Method for the preparation of 1Ylonobromisoclibenzanthrone. The subject of this additional patent is a process for the preparation of monobromoisodibenzanthrone. The procedure consists in that one monobromo-Bzl, Bz1'-benzantlironylsulfid following gender formula:
EMI0001.0006
    treated with alkaline condensation agents, in particular special alcoholic alkali.



  <I> Example </I> 15 parts by weight of monobromo-Bzl, Bzl'-benzanthronyl sulfide (obtained by monobromination of Bzl, Bzl'-benzanthronyl sulfide in suitable solvents) are at 120 'with 90 parts by weight of caustic potash and 75 parts by weight of ethyl alcohol to Be termination of the reaction fused. The melt is absorbed with water and air is introduced as long as there is still dye in the form of the leuco compound.

      It is filtered and washed well. Water out. The dye obtained is a dark purple powder that dissolves in concentrated sulfuric acid with a green color and gives cotton from a blue hydrosulfite vat a strong purple color. Instead of ethyl alcohol, other alcohols can be used, and other caustic alkalis can be used instead of potassium hydrate.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von Honobrom- isodibenzanthron, dadurch gekennzeichnet, da.ss man Monobrom-Bzl, Bzl'-benzanthronyl- sulfid, wie es erhalten werden kann aus Bzl, Bzl' - benzanthronylsulfid durch Umsetzung mit Brom in geeigneten Lö- sungsmitteln, mit einem alkalischen Kon- densationsmittel behandelt. PATENT CLAIM: Process for the preparation of honobromoisodibenzanthrone, characterized in that monobromo-Bzl, Bzl'-benzanthronyl sulfide, as it can be obtained from Bzl, Bzl'-benzanthronyl sulfide by reaction with bromine in suitable solvents, treated with an alkaline condensation agent. Das so er haltene Produkt stellt ein dunkelviolettes Pulver, dar, das sich in konzentrierter Schwefelsäure mit grüner Farbe löst und aus blauer Hydrosulfitküpe Baumwolle kräf tig violett färbt. The product obtained in this way is a dark purple powder which dissolves in concentrated sulfuric acid with a green color and turns cotton from a blue hydrosulfite vat with a strong purple color.
CH120710D 1924-10-20 1925-10-19 Process for the preparation of monobromoisodibenzanthrone. CH120710A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE120710X 1924-10-20
CH119233T 1927-12-05

Publications (1)

Publication Number Publication Date
CH120710A true CH120710A (en) 1927-06-16

Family

ID=25709235

Family Applications (1)

Application Number Title Priority Date Filing Date
CH120710D CH120710A (en) 1924-10-20 1925-10-19 Process for the preparation of monobromoisodibenzanthrone.

Country Status (1)

Country Link
CH (1) CH120710A (en)

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