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CH140911A - Process for the preparation of a condensation product of the benzanthrone series. - Google Patents

Process for the preparation of a condensation product of the benzanthrone series.

Info

Publication number
CH140911A
CH140911A CH140911DA CH140911A CH 140911 A CH140911 A CH 140911A CH 140911D A CH140911D A CH 140911DA CH 140911 A CH140911 A CH 140911A
Authority
CH
Switzerland
Prior art keywords
preparation
chlorobenzanthrone
condensation product
orange
benzanthrone series
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 CH140911A publication Critical patent/CH140911A/en

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

Description

  

  Verfahren zur Darstellung eines Kondensationsproduktes der     Benzanthronreihe.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Darstellung von     2-Chlor-          benzanthron    von der Formel:  
EMI0001.0004     
    welche darin besteht, dass man     1-Chlor-4-          benzoylnaphtalin    mit Kondensationsmitteln  behandelt. Es ist vorteilhaft, die Reaktion  mit einem Gemisch von     Alkalichlorid    und  Aluminiumchlorid unter Zuführen von Sauer  stoff durchzuführen. Das Endprodukt wird  als Zwischenprodukt zur Herstellung von  Farbstoffen verwandt.

      <I>Beispiel</I>  20 Gewichtsteile     1-Chlor-4-benzoylnaph-          talin    (erhalten aus     1-Chlornaphtalin    mit     Ben-          zoylchlorid    nach Friedel     Crafts    F. P. 80  )  werden mit 200 Gewichtsteilen     Natriumalu-          miniumchlorid    unter Zuleitung von Sauerstoff  ungefähr 15 Stunden bei 120   gerührt. Beim  Zersetzen der Schmelze mit Wasser erhält  man olive Flocken. Nach der Reinigung zum  Beispiel durch Vakuumsublimation werden  10-12 Gewichtsteile reines     2-Chlorbenzan-          thron    vom F. P. 200   erhalten.

    
EMI0001.0018     
      Aus Eisessig kristallisiert das so erhaltene       2-Chlorbenzanthron    in gelben Nadeln. Die  Lösungsfarbe in konzentrierter Schwefelsäure  ist orange mit orangegelber Fluoreszenz.



  Process for the preparation of a condensation product of the benzanthrone series. The subject of the present patent is a process for the preparation of 2-chlorobenzanthrone of the formula:
EMI0001.0004
    which consists in treating 1-chloro-4-benzoylnaphthalene with condensing agents. It is advantageous to carry out the reaction with a mixture of alkali chloride and aluminum chloride with the addition of oxygen. The end product is used as an intermediate in the manufacture of dyes.

      <I> Example </I> 20 parts by weight of 1-chloro-4-benzoylnaphthalene (obtained from 1-chloronaphthalene with benzoyl chloride according to Friedel Crafts FP 80) are mixed with 200 parts by weight of sodium aluminum chloride with the addition of oxygen for about 15 hours 120 stirred. When the melt is decomposed with water, olive flakes are obtained. After purification, for example by vacuum sublimation, 10-12 parts by weight of pure 2-chlorobenzanthrone from F. P. 200 are obtained.

    
EMI0001.0018
      The 2-chlorobenzanthrone thus obtained crystallizes from glacial acetic acid in yellow needles. The solution color in concentrated sulfuric acid is orange with orange-yellow fluorescence.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 2-Chlor- benzanthron von der folgenden Formel: EMI0002.0004 dadurch gekennzeichnet, dass man 1-Chlor-4- benzoyInaphtalin mit Kondensationsmitteln behandelt. Aus Eisessig kristallisiert das su erhaltene 2-Chlorbenzanthron in gelben Na deln. Die Lösungsfarbe in konzentrierter Schwefelsäure ist orange mit orangegelber Fluoreszenz. Das reine 2-Chlorbenzanthron schmilzt bei 200 . Es wird als Zwischen produkt zur Herstellung von Farbstoffen ver wandt. UNTERANSPRÜCHE 1. PATENT CLAIM: Process for the preparation of 2-chlorobenzanthrone of the following formula: EMI0002.0004 characterized in that 1-chloro-4-benzoyinaphthalene is treated with condensing agents. The 2-chlorobenzanthrone obtained su crystallizes from glacial acetic acid in yellow needles. The solution color in concentrated sulfuric acid is orange with orange-yellow fluorescence. The pure 2-chlorobenzanthrone melts at 200. It is used as an intermediate in the manufacture of dyes. SUBCLAIMS 1. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man ein Gemisch von Alkalichlorid und Aluminiumchlorid als Kondensationsmittel verwendet. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kondensation unter Zuleiten von Sauerstoff durchführt. Process according to patent claim, characterized in that a mixture of alkali chloride and aluminum chloride is used as the condensing agent. 2. The method according to claim, characterized in that the condensation is carried out with the introduction of oxygen.
CH140911D 1927-07-11 1928-07-09 Process for the preparation of a condensation product of the benzanthrone series. CH140911A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE140911X 1927-07-11
CH138864T 1928-07-09

Publications (1)

Publication Number Publication Date
CH140911A true CH140911A (en) 1930-06-30

Family

ID=25713243

Family Applications (1)

Application Number Title Priority Date Filing Date
CH140911D CH140911A (en) 1927-07-11 1928-07-09 Process for the preparation of a condensation product of the benzanthrone series.

Country Status (1)

Country Link
CH (1) CH140911A (en)

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