AT45592B - Process for the preparation of anthraquinone derivatives. - Google Patents

Process for the preparation of anthraquinone derivatives.

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Publication number
AT45592B
AT45592B AT45592DA AT45592B AT 45592 B AT45592 B AT 45592B AT 45592D A AT45592D A AT 45592DA AT 45592 B AT45592 B AT 45592B
Authority
AT
Austria
Prior art keywords
preparation
anthraquinone
anthraquinone derivatives
mercaptans
sodium
Prior art date
Application number
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German (de)
Original Assignee
Farbenfab Vorm Bayer F & Co
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.)
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Publication date
Priority claimed from DE1908212857D external-priority patent/DE212857C/de
Application filed by Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Application granted granted Critical
Publication of AT45592B publication Critical patent/AT45592B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von   Anthrachinonderivaten.   



   In dem Stammpatente Nr. 41169 und dessen erstem Zusatzpatente Nr. 43879 wurde gezeigt, dass sich Halogenanthrachinone durch Einwirkung von Schwefelalkalien, wobei Halogen gegen die SH-Gruppe ausgetauscht wird, in Merkaptane bezw. die entsprechenden Disulfide überführen lassen. Lässt man statt auf Halogenanthrachinone auf Nitroanthrachinone Schwefelalkalien einwirken, so verläuft die Reaktion anders, indem kein Austausch der negativen Gruppe gegen SH, sondern Reduktion der Nitrogruppe eintritt. Nur in einem Falle (deutsche Patentschrift Nr. 73684 bezw. Nr. 77720), wo ein sehr kompliziertes Nitroanthrachinonderivat zur Anwendung gelangt, wird die Nitrogruppe durch SH ersetzt. 



   Es wurde nun gefunden, dass die Anthrachionsulfosäuren und deren Derivate im allgemeinen ein anderes Verhalten zeigen wie die Nitroanthrachinone, wo anscheinend noch verschiedene andere Gruppen vorhanden sein müssen um einen Austausch der Nitrogruppe zu ermöglichen, indem sie beim Behandeln mit Schwefelalkalien ein den Halogenanthrachinone analoges Verhalten zeigen und die Sulfogruppe gleichfalls unter Bildung von Merkaptanen bezw. Disulfiden austauschen. 



   Die so erhaltenen Merkaptane sind als Farbstoffe verwendbar. 



   Beispiel 1. 



     15 kg Ânthrachinon-oc-sulfosaures   Kali werden mit 100   leg   einer Lösung von Natriumsulfhydrat   (280/0)   und 100 kg Alkohol 24 Stunden am   Rückflusskühler   gekocht. Die 
 EMI1.1 
 aus dem Natriumsalz des im Zusatzpatente Nr. 43879, Beispiel I, beschriebenen 1-Thioanthrachinons und dessen Disulfid. 



   Beispiel II. 



  20 kg   Anthrachinon-l b-disulfosaures   Natron werden mit einer Lösung von 250   k. g   kristallisiertem Schwefelnatrium in   60 kg   Wasser gekocht. Die Schmelze färbt sich bald dunkel und nach Verlauf von etwa 24 Stunden hat sich das Natronsalz des   1'5-Dithio-   anthrachinons vollständig abgeschieden. Man saugt letzteres ab,   wäscht mit Kochsalzlösung   aus und erhält es durch Umkristallisieren aus heissem, alkalihaltigem Wasser und Abscheidung mit Kochsalz in dunkelbraunen Nadeln. Sie losen sich in Alkali rotbraun, in konzentrierter Schwefelsäure rot. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the preparation of anthraquinone derivatives.



   In the parent patent no. 41169 and its first additional patent no. 43879 it was shown that halogenanthraquinones are converted into mercaptans respectively by the action of sulfur alkalis, with halogen being exchanged for the SH group. let transfer the corresponding disulfides. If, instead of haloanthraquinones, alkaline nitroanthraquinones are allowed to act, the reaction proceeds differently in that there is no exchange of the negative group for SH, but a reduction of the nitro group. Only in one case (German Patent No. 73684 and No. 77720), where a very complicated nitroanthraquinone derivative is used, is the nitro group replaced by SH.



   It has now been found that the anthraquinone sulfonic acids and their derivatives generally show a different behavior than the nitroanthraquinones, where apparently various other groups must also be present in order to enable the nitro group to be exchanged by showing a behavior analogous to the haloanthraquinones when treated with alkaline sulfur and the sulfo group likewise with the formation of mercaptans respectively. Exchange disulfides.



   The mercaptans thus obtained can be used as dyes.



   Example 1.



     15 kg of anthraquinone-oc-sulfosaures Kali are boiled with 100 leg of a solution of sodium sulfhydrate (280/0) and 100 kg of alcohol for 24 hours on the reflux condenser. The
 EMI1.1
 from the sodium salt of the 1-thioanthraquinone described in additional patent no. 43879, Example I, and its disulfide.



   Example II.



  20 kg of anthraquinone-1 b-disulfonic acid sodium are mixed with a solution of 250 k g of crystallized sodium sulphide boiled in 60 kg of water. The melt soon turns dark and after about 24 hours the sodium salt of the 1'5-dithioanthraquinone has completely deposited. The latter is filtered off with suction, washed with sodium chloride solution and obtained by recrystallization from hot, alkaline water and separation with sodium chloride in dark brown needles. They dissolve red-brown in alkali and red in concentrated sulfuric acid.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Abänderung des durch das Stammpatent Nr. 41169 und dessen Zusatzpatent Nr. 43879 geschützten Verfahrens zur Darstellung von Merkaptanen resp. Disulfiden der Anthra- chinonreihe, dadurch gekennzeichnet, dass man in den Verfahren der genannten Erfindungen die Halogenanthrachinone durch Anthrachinonsulfosäuren ersetzt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Modification of the process for the representation of mercaptans, which is protected by the parent patent No. 41169 and its additional patent No. 43879, respectively. Disulfides of the anthraquinone series, characterized in that the haloanthraquinones are replaced by anthraquinone sulfonic acids in the processes of the inventions mentioned. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT45592D 1908-02-08 1909-02-22 Process for the preparation of anthraquinone derivatives. AT45592B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1908212857D DE212857C (en) 1908-02-08

Publications (1)

Publication Number Publication Date
AT45592B true AT45592B (en) 1911-01-10

Family

ID=5810252

Family Applications (1)

Application Number Title Priority Date Filing Date
AT45592D AT45592B (en) 1908-02-08 1909-02-22 Process for the preparation of anthraquinone derivatives.

Country Status (1)

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AT (1) AT45592B (en)

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