CH128122A - Process for the preparation of the Bz1-Oxy-Bz2-acetylbenzanthrone. - Google Patents

Process for the preparation of the Bz1-Oxy-Bz2-acetylbenzanthrone.

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Publication number
CH128122A
CH128122A CH128122DA CH128122A CH 128122 A CH128122 A CH 128122A CH 128122D A CH128122D A CH 128122DA CH 128122 A CH128122 A CH 128122A
Authority
CH
Switzerland
Prior art keywords
oxy
acetylbenzanthrone
preparation
red
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 CH128122A publication Critical patent/CH128122A/en

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Description

  

  Verfahren zur Darstellung des     Bz1-Oxy-Bz2-acetylbenzanthrons.            Gegenstand!    der vorliegenden Erfindung  ist ein Verfahren zur Darstellung des     Bzl-          Oxy-Bz2-acetylbenzanthrons,    dadurch ge  kennzeichnet, dass man     Anthron    und     Oxy-          methylenacetessigester    der     folgenden    Formel:  
EMI0001.0009     
    unter Zusatz eines.     sauren,    Kondensations  mittels     kondensiert.     



  <I>Beispiel:</I>  19 Gewichtsteile     Anthron    löst man in  100 Gewichtsteilen Schwefelsäure von 66         B6    und verdünnt mit 10 Gewichtsteilen  Wasser. Dann setzt man eine Lösung von  21 Gewichtsteilen     Oxymethylenacetessigester     in 30 Gewichtsteilen Eisessig bei etwa<B>60'</B>  zu. Die Lösungsfarbe ändert sich von braun  gelb über blauviolett nach karminrot. Nach    kurzem     Nachrühren    bei<B>100'</B> gibt man auf  Wasser, entzieht dem Rohprodukt durch Al  kaIi-Hydrosulfitlösung etwa     vorhandenes          Anthron    und     Anthrachinon    und trocknet. Zur  Reinigung kann aus Nitrobenzol umkristalli  siert werden.

   Der Körper bildet goldgelbe  Nadeln vom Schmelzpunkt 2,95  . Nach Ana  lyse und Eigenschaften zu schliessen, liegt  hier das     B@zl-Oxy-B.z2-acetylbenzanthron    vor.  In wässerigem Alkali löst es sich mit kar  minroter Farbe. Die Lösungsfarbe in kon  zentrierter     'Schwefelsäure    ist karminrot mit  braunroter Fluoreszenz.



  Process for the preparation of the Bz1-Oxy-Bz2-acetylbenzanthrone. Object! The present invention is a process for the preparation of Bzl-oxy-Bz2-acetylbenzanthrone, characterized in that anthrone and oxymethylene acetoacetic ester of the following formula:
EMI0001.0009
    with the addition of a. acidic, condensation means condensed.



  <I> Example: </I> 19 parts by weight of anthrone are dissolved in 100 parts by weight of sulfuric acid of 66 B6 and diluted with 10 parts by weight of water. A solution of 21 parts by weight of oxymethylene acetoacetic ester in 30 parts by weight of glacial acetic acid is then added at about 60 '. The color of the solution changes from brown-yellow through blue-violet to carmine red. After briefly stirring at <B> 100 '</B>, the mixture is poured into water, any anthrone and anthraquinone present are removed from the crude product using alkali hydrosulfite solution and dried. For cleaning, it can be recrystallized from nitrobenzene.

   The body forms golden yellow needles with a melting point of 2.95. According to the analysis and properties, this is B@zl-Oxy-B.z2-acetylbenzanthron. In aqueous alkali it dissolves with a carmin-red color. The color of the solution in concentrated sulfuric acid is carmine-red with brown-red fluorescence.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung des Bz1-Oxy- Bz2-acetylbenzanthrons, dadurch gekenn zeichnet, dass man Anthron und Oxymethy- lenacetessigester unter Zusatz eines sauren Kondensationsmittels kondensiert. Das Produkt kristallisiert in goldgelben Nadeln vom Schmelzpunkt 295 . Nach Ana lyse und Eigenschaften zu schliessen, liegt hier das Bzl - Oxy - Bz2 - acetylbenzanthron vor. PATENT CLAIM: Process for the preparation of Bz1-oxy-Bz2-acetylbenzanthrone, characterized in that anthrone and oxymethylene acetoacetic ester are condensed with the addition of an acidic condensing agent. The product crystallizes in golden yellow needles with a melting point of 295. According to the analysis and properties, this is Bzl - Oxy - Bz2 - acetylbenzanthrone. Es löst sich in wässerigem Alkali mit karminroter Farbe, in konzentrierter -Schwe- felsäure karminrot mit braunroter Fluores zenz. It dissolves in aqueous alkali with a carmine red color, in concentrated sulfuric acid carmine red with a brownish-red fluorescence.
CH128122D 1926-04-03 1927-04-02 Process for the preparation of the Bz1-Oxy-Bz2-acetylbenzanthrone. CH128122A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE128122X 1926-04-03
CH127266T 1927-04-02

Publications (1)

Publication Number Publication Date
CH128122A true CH128122A (en) 1928-10-01

Family

ID=25710838

Family Applications (1)

Application Number Title Priority Date Filing Date
CH128122D CH128122A (en) 1926-04-03 1927-04-02 Process for the preparation of the Bz1-Oxy-Bz2-acetylbenzanthrone.

Country Status (1)

Country Link
CH (1) CH128122A (en)

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