CH128116A - Procedure for the representation of Bz1. Bz2-dimethylbenzanthrone. - Google Patents

Procedure for the representation of Bz1. Bz2-dimethylbenzanthrone.

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Publication number
CH128116A
CH128116A CH128116DA CH128116A CH 128116 A CH128116 A CH 128116A CH 128116D A CH128116D A CH 128116DA CH 128116 A CH128116 A CH 128116A
Authority
CH
Switzerland
Prior art keywords
dimethylbenzanthrone
representation
red
procedure
anthrone
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 CH128116A publication Critical patent/CH128116A/en

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

Description

  

  Verfahren zur     Darstellung    von     Bz1.        Dz2-Dgmethylbenzanthr        on.       Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Darstellung des       Bzl    .     Bz2-Dimethylbenzanthrons,    dadurch ge  kennzeichnet, dass man     Anthron    und     (Oxy-          methylen-methyl)-äthylketonnatrium    der fol  genden Formel:  
EMI0001.0010     
    unter Zusatz eines sauren Kondensations  mittels kondensiert.  



  <I>Beispiel:</I>       1ä    Gewichtsteile     (Oxymethylen-methyl)-          äthylketonnatrium    werden in 40 Gewichts  teilen Eisessig gelöst und diese Lösung zu  einer solchen von 19 Gewichtsteilen     Anthron     in 100     Gewichtsteilen    Schwefelsäure von     62,           B6    gegeben. Unter Selbsterwärmung ändert  sich die ursprünglich gelbe     Lösungsfarbe    des       Anthrons    über grün nach     grünblau    (l. Phase    der Reaktion). Beim Erwärmen auf     etwa     110   wird die Lösung schliesslich rein rot.

    Nach     einstündigem        Nachrühren    bei dieser  Temperatur     wird    auf Eiswasser gegossen     und     das in gelben Flocken abgeschiedene     Bzl.Bz2-          Dimethylbenzanthron    isoliert. Aus Eisessig  kristallisiert dasselbe in gelben Nadeln vom  Schmelzpunkt 207  . Konzentrierte Schwefel  säure löst rot mit     rotbrauner    Fluoreszenz.



  Procedure for the representation of Bz1. Dz2-Dgmethylbenzanthron. The present invention relates to a method for representing the Bzl. Bz2-Dimethylbenzanthrons, characterized in that anthrone and (oxymethylene-methyl) -ethylketone sodium of the following formula:
EMI0001.0010
    condensed with the addition of an acidic condensation means.



  <I> Example: </I> 1ä parts by weight (oxymethylene-methyl) - ethyl ketone sodium are dissolved in 40 parts by weight of glacial acetic acid and this solution is added to one of 19 parts by weight of anthrone in 100 parts by weight of sulfuric acid of 62, B6. With self-heating, the originally yellow solution color of the anthrone changes from green to green-blue (first phase of the reaction). When heated to around 110, the solution will eventually turn pure red.

    After stirring for one hour at this temperature, it is poured onto ice water and the Bzl.Bz2-dimethylbenzanthrone which has separated out in yellow flakes is isolated. It crystallizes from glacial acetic acid in yellow needles with a melting point of 207. Concentrated sulfuric acid dissolves red with red-brown fluorescence.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von Bzl . Bz2- Dimethylbenzanthron, dadurch gekennzeich net, dass man Anthron und (Oxymethylen- methyl)-äthylketonnatrium unter Zusatz eines sauren Kondensationsmittels konden siert. Das Produkt kristallisiert in gelben Na deln vom Schmelzpunkt<B>207'.</B> Konzentrierte Schwefelsäure löst rot mit rotbrauner Fluo reszenz. PATENT CLAIM: Process for the representation of Bzl. Bz2- dimethylbenzanthrone, characterized in that anthrone and (oxymethylene methyl) ethyl ketone sodium are condensed with the addition of an acidic condensing agent. The product crystallizes in yellow needles with a melting point of <B> 207 '. </B> Concentrated sulfuric acid dissolves red with a red-brown fluorescence.
CH128116D 1926-04-03 1927-04-02 Procedure for the representation of Bz1. Bz2-dimethylbenzanthrone. CH128116A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE128116X 1926-04-03
CH127266T 1927-04-02

Publications (1)

Publication Number Publication Date
CH128116A true CH128116A (en) 1928-10-01

Family

ID=25710832

Family Applications (1)

Application Number Title Priority Date Filing Date
CH128116D CH128116A (en) 1926-04-03 1927-04-02 Procedure for the representation of Bz1. Bz2-dimethylbenzanthrone.

Country Status (1)

Country Link
CH (1) CH128116A (en)

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