CH128126A - Process for the preparation of Bz1-oxybenzanthrone. - Google Patents

Process for the preparation of Bz1-oxybenzanthrone.

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Publication number
CH128126A
CH128126A CH128126DA CH128126A CH 128126 A CH128126 A CH 128126A CH 128126D A CH128126D A CH 128126DA CH 128126 A CH128126 A CH 128126A
Authority
CH
Switzerland
Prior art keywords
oxybenzanthrone
bzl
red
concentrated sulfuric
preparation
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 CH128126A publication Critical patent/CH128126A/en

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

Description

  

  Verfahren zur Darstellung von     Bz1-Oxybenzanthron.            Gegenstand:    der vorliegenden Erfindung  ist ein Verfahren zur Darstellung von     Bzl-          Oxybenzanthron,    dadurch gekennzeichnet,  dass man     Anthron    und     Acrylsäure    der fol  genden Formel  
EMI0001.0007     
    unter Zusatz eines sauren Kondensations  mittels     kondensiert.     



  <I>' Beispiel:</I>  150 Gewichtsteile     Anthron    werden in 600  <B>cm'</B> konzentrierter Schwefelsäure gelöst und  100 Gewichtsteile Wasser zugesetzt.     Sodann     lässt man eine Lösung von 70     gr        Acrylsäure     in 150 cm' Eisessig bei<B>80'</B> zur     Anthron-          lösung    zulaufen. Die Temperatur steigt auf  ungefähr 100 .

   Nun     wird    kurze Zeit gerührt,  wobei die Lösung eine     violettrote    Farbe an-    nimmt; sodann giesst man auf Wasser und  isoliert das in     orangebraunen    Flocken ab  geschiedene     Oxyben:zanthron.    Dasselbe ist  identisch mit dem im Beispiel vom Zusatz  patent     Nr.128124    beschriebenen     Bzl-Oxy-          benza.nthron.  



  Process for the preparation of Bz1-oxybenzanthrone. The subject matter of the present invention is a process for the preparation of Bzl-oxybenzanthrone, characterized in that anthrone and acrylic acid of the following formula are used
EMI0001.0007
    condensed with the addition of an acidic condensation means.



  <I> 'Example: </I> 150 parts by weight of anthrone are dissolved in 600 <B> cm' </B> concentrated sulfuric acid and 100 parts by weight of water are added. A solution of 70 grams of acrylic acid in 150 cm 'glacial acetic acid at <B> 80' </B> is then added to the anthrone solution. The temperature rises to around 100.

   The mixture is then stirred for a short time, the solution taking on a violet-red color; then it is poured into water and the oxybene separated in orange-brown flakes is isolated: zanthron. The same is identical to the Bzl-Oxybenza.nthron described in the example of the additional patent no.128124.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstelung von Bzl-Oxy- benzanthron, dadurch gekennzeichnet, dass man Anthron und Acrylsäure unter Zusatz eines sauren Kondensationsmittels konden siert. Das Bzl-Oxybenzanthron kristallisiert aus hochsiedenden Lösungsmitteln in rot orangen NädelcUen vom Schmelzpunkt 317 ; es löst sich in wässerigem Alkali, sowie in konzentrierter Schwefelsäure mit rotvioletter Farbe. Die Lösung in konzentrierter Schwe felsäure zeigt eine kräftige rote Fluoreszenz. PATENT CLAIM: Process for the production of Bzl-oxybenzanthrone, characterized in that anthrone and acrylic acid are condensed with the addition of an acidic condensing agent. The Bzl-Oxybenzanthron crystallizes from high-boiling solvents in red-orange needles with a melting point of 317; it dissolves in aqueous alkali and in concentrated sulfuric acid with a red-violet color. The solution in concentrated sulfuric acid shows a strong red fluorescence.
CH128126D 1927-03-09 1927-04-02 Process for the preparation of Bz1-oxybenzanthrone. CH128126A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE128126X 1927-03-09
CH127266T 1927-04-02

Publications (1)

Publication Number Publication Date
CH128126A true CH128126A (en) 1928-10-01

Family

ID=25710842

Family Applications (1)

Application Number Title Priority Date Filing Date
CH128126D CH128126A (en) 1927-03-09 1927-04-02 Process for the preparation of Bz1-oxybenzanthrone.

Country Status (1)

Country Link
CH (1) CH128126A (en)

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