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CH128635A - Process for the preparation of a 1-derivative of anthraquinone. - Google Patents

Process for the preparation of a 1-derivative of anthraquinone.

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Publication number
CH128635A
CH128635A CH128635DA CH128635A CH 128635 A CH128635 A CH 128635A CH 128635D A CH128635D A CH 128635DA CH 128635 A CH128635 A CH 128635A
Authority
CH
Switzerland
Prior art keywords
preparation
anthraquinonyl
phenyl
diketone
anthraquinone
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 CH128635A publication Critical patent/CH128635A/en

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

Description

  

  Verfahren zur Darstellung eines     1-Derivates    des     Anthrachinons.       Gegenstand dieser Erfindung ist ein     Ver-          f        ahren    zur Darstellung von     1-Anthrachinonyl-          phenyl    -1. 2. -     diketon        (Monophtaloyl-benzil),     welches dadurch gekennzeichnet ist, dass man         Bzl-Benzoylbenzanthron    der Oxydation mit  Chromsäure in Eisessig unterwirft.  



  Die Oxydation verläuft vermutlich nach  folgendem Schema:  
EMI0001.0011     
    <I>Beispiel:</I>  10 Gewichtsteile     Bzl-Benzoylbenzanthron     (dargestellt zum Beispiel aus     Bzl-BenZ-          anthroncarbonsäurechlorid    mit Benzol und  Aluminiumchlorid, F. P. 195  ) werden     in     100     Gewichtsteilen    Eisessig in der     Siedehitze     gelöst und allmählich soviel festes Chrom  säureanhydrid     eingetragen,    bis eine Probe, in  konzentrierter Schwefelsäure gelöst, keine  Fluoreszenz mehr zeigt. Man verdünnt nun    heiss mit 40 Gewichtsteilen Wasser und lässt  erkalten.

   Das Oxydationsprodukt scheidet  sich in fast farblosen, schwach gelblichen       Nädelchen    ab. Es schmilzt bei<B>180'.</B> Lö  sungsfarbe in konzentrierter Schwefelsäure  gelb, nach Zusatz von etwas Kupferpulver  rein blau. Schon bei kurzem Belichten färbt  sich die Substanz blauschwarz.  



  Das     1-Anthrachinonyl-phenyl-,1.2-dike-          ton    soll als Zwischenprodukt zur Darstellung  von Farbstoffen Verwendung finden.



  Process for the preparation of a 1-derivative of anthraquinone. This invention relates to a process for the preparation of 1-anthraquinonylphenyl -1. 2. - diketone (monophthalyl-benzil), which is characterized in that Bzl-benzoylbenzanthrone is subjected to oxidation with chromic acid in glacial acetic acid.



  The oxidation probably proceeds according to the following scheme:
EMI0001.0011
    <I> Example: </I> 10 parts by weight of Bzl-Benzoylbenzanthron (prepared for example from Bzl-BenZ- anthronecarboxylic acid chloride with benzene and aluminum chloride, FP 195) are dissolved in 100 parts by weight of glacial acetic acid at the boiling point and gradually as much solid chromium anhydride is added until a sample dissolved in concentrated sulfuric acid no longer shows any fluorescence. It is now diluted hot with 40 parts by weight of water and allowed to cool.

   The oxidation product is deposited in almost colorless, pale yellowish needles. It melts at <B> 180 '. </B> The solution color in concentrated sulfuric acid is yellow, after adding some copper powder it becomes pure blue. Even with a short exposure, the substance turns blue-black.



  The 1-anthraquinonyl-phenyl-, 1.2-diketon is said to be used as an intermediate for the preparation of dyes.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung des 1-Anthra- chinonyl-phenyl-1 , 2-diketon, dadurch ge kennzeichnet, daB man Bzl-Benzoylbenzan- thron der Oxydation mit Chromsäure in Eis essig unterwirft. Das 1-Anthrachinonyl=phenyl-l.2-dike- ton scheidet sich in fast farblosen, schwach gelblichen Nädelchen ab. Es schmilzt bei 180 . Lösungsfarbe in konzentrierter Schwe- feleäure gelb, nach Zusatz von etwas Kupfer pulver rein blau. PATENT CLAIM: Process for the preparation of 1-anthraquinonyl-phenyl-1,2-diketone, characterized in that Bzl-benzoylbenzanthrone is subjected to oxidation with chromic acid in glacial acetic acid. 1-Anthraquinonyl = phenyl-1.2-diketon is deposited in almost colorless, pale yellowish needles. It melts at 180. The solution color in concentrated sulfuric acid is yellow, after adding a little copper powder it is pure blue. Schon bei kurzem Belichten färbt sich die Substanz blauschwarz. Das 1-Anthrachinonyl-phenyl-l. 2-diketon soll als Zwischenprodukt zur Darstellung von Farbstoffen Verwendung finden. Even with a short exposure, the substance turns blue-black. The 1-anthraquinonyl-phenyl-l. 2-diketone is said to be used as an intermediate for the preparation of dyes.
CH128635D 1926-06-07 1927-05-24 Process for the preparation of a 1-derivative of anthraquinone. CH128635A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE128635X 1926-06-07
CH127253T 1927-05-24

Publications (1)

Publication Number Publication Date
CH128635A true CH128635A (en) 1928-11-01

Family

ID=25710796

Family Applications (1)

Application Number Title Priority Date Filing Date
CH128635D CH128635A (en) 1926-06-07 1927-05-24 Process for the preparation of a 1-derivative of anthraquinone.

Country Status (1)

Country Link
CH (1) CH128635A (en)

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