CH128113A - Process for the preparation of the Bz1-methylbenzanthrone. - Google Patents

Process for the preparation of the Bz1-methylbenzanthrone.

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Publication number
CH128113A
CH128113A CH128113DA CH128113A CH 128113 A CH128113 A CH 128113A CH 128113D A CH128113D A CH 128113DA CH 128113 A CH128113 A CH 128113A
Authority
CH
Switzerland
Prior art keywords
methylbenzanthrone
preparation
bzl
acetone
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 CH128113A publication Critical patent/CH128113A/en

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Description

  

  Verfahren zur Darstellung des     Bz1-illethylbenzanthrons.       Gegenstand der     vorliegenden.    Erfindung  ist ein Verfahren     zur        Darstellung    des     Bzl-          Methylbenzanthrons,    dadurch gekennzeich  net, dass man     Anthron    und     Oxymethylen-          acetonnatrium    von der folgenden Formel:  
EMI0001.0010     
    unter Zusatz eines sauren Kondensations  mittels kondensiert.  



  <I>Beispiel:</I>  13 Gewichtsteile     Oxymethylenaceton-          natrium        [Ber.    21, 2144 u.     Ber.    22, 3274] wer  den in 40 Gewichtsteilen Eisessig gelöst und  diese Lösung zu     einer    solchen von 19 Ge  wichtsteilen     Anthron    in 100     Gewichtsteilen     Schwefelsäure von 62       B6    gegeben. Der Re  aktionsverlauf ist an der Farbe der Lösung,  welche über grün-, blau- nach     karminrot    um-    schlägt, deutlich zu verfolgen.

   Das aus der  karminroten Lösung, mit Wasser abgeschie  dene     Bzl-Methylbenzanthron    ist identisch  mit dem nach dem     Hauptpatent    Nr. 127266  erhaltenen. Die     Benzanthronbildung    ist in  diesem Falle umso überraschender, als die  grosse Neigung des     Oxymethylenacetons    zur  Selbstkondensation unter Bildung von     Tri-          acetylbenzol    bekannt ist.



  Process for the preparation of the Bz1-illethylbenzanthrone. Subject of the present. Invention is a process for the preparation of Bzl methylbenzanthrone, characterized in that one anthrone and oxymethylene acetone sodium of the following formula:
EMI0001.0010
    condensed with the addition of an acidic condensation means.



  <I> Example: </I> 13 parts by weight of oxymethylene acetone sodium [Ber. 21, 2144 and Ber. 22, 3274] who dissolved the in 40 parts by weight of glacial acetic acid and this solution was added to one of 19 parts by weight of anthrone in 100 parts by weight of sulfuric acid of 62 B6. The course of the reaction can be clearly followed by the color of the solution, which changes from green to blue to carmine red.

   The Bzl-methylbenzanthrone from the crimson solution with water is identical to that obtained according to the main patent no. 127266. The formation of benzanthrone is all the more surprising in this case as the great tendency of oxymethylene acetone to self-condense with the formation of triacetylbenzene is known.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung des BZl-Me- thylbenzanthrons, dadurch gekennzeichnet, dass man Anthron und Oxymethylenaceton- natrium unter Zusatz eines sauren Konden- sationsmittels , kondensiert. Das erhaltene Produkt ist ein in schönen gelben Nadeln kristallisiertes Methylbenz- anthron, das bei 164 schmilzt und in dem der Methylrest in der Bzl-Stellung steht. PATENT CLAIM: Process for the preparation of BZl methylbenzanthrone, characterized in that anthrone and sodium oxymethylene acetone are condensed with the addition of an acidic condensation agent. The product obtained is a methylbenzanthrone crystallized in beautiful yellow needles, which melts at 164 and in which the methyl radical is in the Bzl position.
CH128113D 1926-04-03 1927-04-02 Process for the preparation of the Bz1-methylbenzanthrone. CH128113A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE128113X 1926-04-03
CH127266T 1927-04-02

Publications (1)

Publication Number Publication Date
CH128113A true CH128113A (en) 1928-10-01

Family

ID=25710829

Family Applications (1)

Application Number Title Priority Date Filing Date
CH128113D CH128113A (en) 1926-04-03 1927-04-02 Process for the preparation of the Bz1-methylbenzanthrone.

Country Status (1)

Country Link
CH (1) CH128113A (en)

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