CH190904A - Process for the preparation of an indigoid dye of the pyrene series. - Google Patents

Process for the preparation of an indigoid dye of the pyrene series.

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Publication number
CH190904A
CH190904A CH190904DA CH190904A CH 190904 A CH190904 A CH 190904A CH 190904D A CH190904D A CH 190904DA CH 190904 A CH190904 A CH 190904A
Authority
CH
Switzerland
Prior art keywords
preparation
pyrene
indigoid dye
bordo
series
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 CH190904A publication Critical patent/CH190904A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines     indigoiden        Farbstoffes    der     Pyrenreihe.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Darstellung eines     indigoi-          den    Farbstoffes der     Pyrenreihe,    welches da  durch gekennzeichnet ist, dass man     4,3-Pyren-          3'-ogythiophen    mit     Acenaphthenchinon    kon  densiert.  



  <I>Beispiel:</I>  27,4 Gewichtsteile     4,3-Pyren-3'-ogythio-          phen    werden in 3000 Gewichtsteilen Eisessig,  und 19,1 Gewichtsteile     Acenaphthenchinon     werden in 1000 Gewichtsteilen Eisessig heiss  gelöst. Die beiden Lösungen werden heiss  zusammengegeben, mit einer kleinen     Menge     konzentrierter Salzsäure versetzt und einige  Zeit gekocht. Dann wird heiss     abgenutscht     und zuerst mit heissem Eisessig, dann mit  Alkohol gewaschen. Der rotbraune     Farbstoff     lässt sich z.

   B. aus     Trichlorbenzol        umkristalli-          sieren    und färbt, aus konzentrierter Schwefel  säure umgelöst, aus     bordogefärbter        Hydro-          sulfitküpe    ein kräftiges     Bordo.  



  Process for the preparation of an indigoid dye of the pyrene series. The subject of the present patent is a process for the preparation of an indigoid dye of the pyrene series, which is characterized by the fact that 4,3-pyrene-3'-ogythiophene is condensed with acenaphthenequinone.



  <I> Example: </I> 27.4 parts by weight of 4,3-pyrene-3'-ogythiophene are dissolved in 3000 parts by weight of glacial acetic acid, and 19.1 parts by weight of acenaphthenquinone are dissolved in 1000 parts by weight of hot glacial acetic acid. The two solutions are combined while hot, mixed with a small amount of concentrated hydrochloric acid and boiled for a while. Then it is sucked off hot and washed first with hot glacial acetic acid, then with alcohol. The red-brown dye can be z.

   B. recrystallize from trichlorobenzene and color, redissolved from concentrated sulfuric acid, from a bordo-colored hydrosulfite vat a strong bordo.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines indigoi- den Farbstoffes der Pyrenreihe, dadurch ge kennzeichnet, dass man 4,3-Pyren-3'-ogythio- phen mit Acenaphthenchinon kondensiert. Der so erhaltene rotbraune Farbstoff färbt, aus konzentrierter Schwefelsäure umgelöst, aus bordogefärbter Hydrosulfitküpe ein kräf tiges Bordo. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Reaktionskom ponenten in Eisessig in Gegenwart einer ge ringen Menge konzentrierter Salzsäure einige Zeit kocht. PATENT CLAIM: A process for the preparation of an indigoid dye of the pyrene series, characterized in that 4,3-pyrene-3'-ogythiophene is condensed with acenaphthenequinone. The red-brown dye obtained in this way, redissolved from concentrated sulfuric acid, dyes a strong Bordo from a bordo-colored hydrosulfite vat. SUBSTANTIAL CLAIM: Process according to claim, characterized in that the reaction components are boiled for some time in glacial acetic acid in the presence of a small amount of concentrated hydrochloric acid.
CH190904D 1934-07-18 1935-07-17 Process for the preparation of an indigoid dye of the pyrene series. CH190904A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE190904X 1934-07-18
CH186852T 1935-07-17

Publications (1)

Publication Number Publication Date
CH190904A true CH190904A (en) 1937-05-15

Family

ID=25721458

Family Applications (1)

Application Number Title Priority Date Filing Date
CH190904D CH190904A (en) 1934-07-18 1935-07-17 Process for the preparation of an indigoid dye of the pyrene series.

Country Status (1)

Country Link
CH (1) CH190904A (en)

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