CH139373A - Process for the preparation of 1,4-Dioxy-6-methyl-8-chlorobenzo-thiophanthrenequinone. - Google Patents

Process for the preparation of 1,4-Dioxy-6-methyl-8-chlorobenzo-thiophanthrenequinone.

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Publication number
CH139373A
CH139373A CH139373DA CH139373A CH 139373 A CH139373 A CH 139373A CH 139373D A CH139373D A CH 139373DA CH 139373 A CH139373 A CH 139373A
Authority
CH
Switzerland
Prior art keywords
methyl
chlorobenzo
dioxy
preparation
thiophanthrenequinone
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 CH139373A publication Critical patent/CH139373A/en

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  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung von     1.4-Dioxy-6-methyl-8-chlorbenzo-thiophanthrenchinon.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung des     1.4-Dioxy-6-          methyl-8-chlorbenzo-thiophanthrenchinons    von  folgender Formel:  
EMI0001.0004     
    dadurch gekennzeichnet, dass man     5-Chlor-7-          methyl-thionaphten-2.3-dicarbonsäureanhydrid     mit     Hydrochinon    in Gegenwart eines sauren  Kondensationsmittels kondensiert. Die erhal  tene Verbindung soll zur Herstellung von       Farbstoffen    Verwendung finden.  



       Beispiel:     Ein Gemisch von 25 Gewichtsteilen     5-          Chlor-        7-methylthionaphten-2    .     3-dicarbonsäure-          anhydrid    und 12 Gewichtsteilen     Hydrochinon       wird bei 180  in eine Schmelze von 20 Ge  wichtsteilen Kochsalz und 100 Gewichtsteilen  Aluminiumchlorid unter Rühren eingetragen,  die Temperatur auf 190  gesteigert und wäh  rend 5 Stunden gehalten. Dann wird mit  Eis und Salzsäure zersetzt und aufgearbeitet.

    Das entstandene     1.4-Dioxy-6-methyl-8-chlor-          benzo-thiophanthrenchinon:     
EMI0001.0018     
    kann über die     Diacetylverbindung    oder durch       Umkristallisieren    aus     Pyridin    gereinigt wer  den. Die Verbindung schmilzt bei     291L-292      und kristallisiert in federartigen Nadeln.



  Process for the preparation of 1,4-Dioxy-6-methyl-8-chlorobenzo-thiophanthrenequinone. The subject of this additional patent is a process for the preparation of 1,4-dioxy-6-methyl-8-chlorobenzo-thiophanthrenequinone with the following formula:
EMI0001.0004
    characterized in that 5-chloro-7-methyl-thionaphthene-2,3-dicarboxylic anhydride is condensed with hydroquinone in the presence of an acidic condensing agent. The compound obtained is intended to be used for the production of dyes.



       Example: A mixture of 25 parts by weight of 5-chloro-7-methylthionaphten-2. 3-dicarboxylic anhydride and 12 parts by weight of hydroquinone is added at 180 to a melt of 20 parts by weight of table salt and 100 parts by weight of aluminum chloride with stirring, the temperature is increased to 190 and held during 5 hours. Then it is decomposed and worked up with ice and hydrochloric acid.

    The resulting 1,4-dioxy-6-methyl-8-chlorobenzo-thiophanthrenequinone:
EMI0001.0018
    can be purified via the diacetyl compound or by recrystallization from pyridine. The compound melts at 291L-292 and crystallizes in feather-like needles.

Claims (1)

PATENTANSPRUCIi Verfahren zur Darstellung von 1.4-Dioxy-6- methvl-8-chlorbenzo-thioDhanthrenchinon von folgender Formel: EMI0002.0001 dadurch gekennzeichnet, dass man 5-Chlor-7- methyl-thionaphten-2.3-dicar bonsäurean hydri d in Gegenwart eines sauren Kondensations- mittels-. mit Hydrochinon kondensiert. Die Verbindung schmilzt bei 291-292 und kri stallisiert in federartigen Nadeln. Sie soll zur Herstellung von Farbstoffen Verwendung finden. PATENT CLAIMS Process for the preparation of 1.4-Dioxy-6-methvl-8-chlorobenzo-thioDhanthrenequinone of the following formula: EMI0002.0001 characterized in that 5-chloro-7-methyl-thionaphten-2,3-dicarboxylic acid anhydride in the presence of an acidic condensation agent. condensed with hydroquinone. The compound melts at 291-292 and crystallizes in spring-like needles. It should be used for the production of dyes.
CH139373D 1927-09-07 1928-08-16 Process for the preparation of 1,4-Dioxy-6-methyl-8-chlorobenzo-thiophanthrenequinone. CH139373A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE139373X 1927-09-07
CH137740T 1928-08-16

Publications (1)

Publication Number Publication Date
CH139373A true CH139373A (en) 1930-04-15

Family

ID=25713039

Family Applications (1)

Application Number Title Priority Date Filing Date
CH139373D CH139373A (en) 1927-09-07 1928-08-16 Process for the preparation of 1,4-Dioxy-6-methyl-8-chlorobenzo-thiophanthrenequinone.

Country Status (1)

Country Link
CH (1) CH139373A (en)

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