AT96528B - Process for the preparation of hydrazo derivatives of anthraquinone. - Google Patents

Process for the preparation of hydrazo derivatives of anthraquinone.

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Publication number
AT96528B
AT96528B AT96528DA AT96528B AT 96528 B AT96528 B AT 96528B AT 96528D A AT96528D A AT 96528DA AT 96528 B AT96528 B AT 96528B
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Austria
Prior art keywords
anthraquinone
preparation
hydrazo
hydrazo derivatives
derivatives
Prior art date
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German (de)
Inventor
Eduard Dr Kopetschni
Original Assignee
Eduard Dr Kopetschni
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Publication of AT96528B publication Critical patent/AT96528B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von Hydrazoderivaten des Anthrachinon. 
 EMI1.1 
 anthrachinon, während das nach D. R. P. Nr.   247352 erhältliche   2,   2'-Azoanthrachinon   beim Behandeln mit Natriumsulfid glatt zu 2-Aminoanthrachinon aufgespalten wird. 



   Es wurde nun gefunden, dass man zu den bisher unbekannten Hydrazoderivaten des   Anthraehinons   gelangen kann, wenn man Azoanthrachinone mit   Sehwefelammon   behandelt. Dieses Ergebnis erscheint um so auffallender, als es nach R. Scholl und F. Eberle   (vgl. Monatshefte   für Chemie", Bd. 32, S. 1035) nicht gelingt, 2,   2'-Azoxyanthrachinon   durch Behandeln mit   Sehwefelammon   zu einer Hydrazoverbindung zu reduzieren, während aromatische Azoxyverbindungen im allgemeinen   (va ; l.   Witt und Kopetsehni, Ber. 45, S. 1136) hiebei in Hydrazokörper übergehen. 



   Beispiel :   Teil 2, 2tAzoanthrachinon   wird in 20 Teilen Alkohol suspendiert und nach Zusatz 
 EMI1.2 
 schwachgelbliehe 2,   2'-Azoallthrachinon   in ein intensiv ziegelrotes Produkt umgewandelt ist. Hierauf wird abgesaugt und das in nahezu quantitativer Ausbeute erhaltene Produkt mit Alkohol gewaschen und getrocknet. Das gewonnene 2,   2'-Hydrazoanthrachinon   ist in heissem Alkohol, Eisessig und Xylol nahezu   unlöslich.   Anilin und Nitrobenzol lösen in der Wärme leicht mit hellgelber Farbe und beim Erkalten kristallisiert das 2,   2'-Hydrazoanthrachinon   in roten   Blättchen   wieder aus. Durch Behandeln mit stärkeren Reduktionsmitteln oder beim Verküpen mit Hydrosulfit erhält man hieraus 2-Aminoanthrachinon. 
 EMI1.3 
 Alkohol und Eisessig unlöslich.

   Nitrobenzol löst mit gelbroter Farbe. 



   Die auf diesem Wege gewonnenen Hydrazoanthrachinone sind wertvolle Ausgangsmaterialien zur Herstellung von Farbstoffen. 

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



   <Desc / Clms Page number 1>
 



  Process for the preparation of hydrazo derivatives of anthraquinone.
 EMI1.1
 anthraquinone, while the 2,2'-azoanthraquinone obtainable according to D. R. P. No. 247352 is split smoothly to 2-aminoanthraquinone when treated with sodium sulfide.



   It has now been found that the hitherto unknown hydrazo derivatives of anthraehinone can be obtained if azoanthraquinones are treated with sulfur ammonium. This result appears all the more striking since, according to R. Scholl and F. Eberle (cf.monthshefte für Chemie ”, vol. 32, p. 1035) it is not possible to convert 2,2'-azoxyanthraquinone to a hydrazo compound by treating it with sulfurammon reduce, while aromatic azoxy compounds in general (especially; 1. Witt and Kopetsehni, Ber. 45, p. 1136) are converted into hydrazo bodies.



   Example: Part 2, 2t azoanthraquinone is suspended in 20 parts of alcohol and after addition
 EMI1.2
 pale yellow 2, 2'-azoallthraquinone is converted into an intense brick-red product. It is then filtered off with suction and the product obtained in almost quantitative yield is washed with alcohol and dried. The 2,2'-hydrazoanthraquinone obtained is almost insoluble in hot alcohol, glacial acetic acid and xylene. Aniline and nitrobenzene easily dissolve with a light yellow color when heated and when cooled the 2,2'-hydrazoanthraquinone crystallizes out again in red flakes. Treatment with stronger reducing agents or vat with hydrosulfite gives 2-aminoanthraquinone.
 EMI1.3
 Alcohol and glacial acetic acid are insoluble.

   Nitrobenzene dissolves with a yellow-red color.



   The hydrazoanthraquinones obtained in this way are valuable starting materials for the production of dyes.

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

 

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung von Hydrazoderivaten des Anthrachinone, dadurch gekennzeichnet dass man Azoanthrachinone mit Sehwefelammon behandelt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of hydrazo derivatives of anthraquinones, characterized in that azoanthraquinones are treated with sulphurammon. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT96528D 1922-06-17 1922-06-17 Process for the preparation of hydrazo derivatives of anthraquinone. AT96528B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT96528T 1922-06-17

Publications (1)

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AT96528B true AT96528B (en) 1924-04-10

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AT96528D AT96528B (en) 1922-06-17 1922-06-17 Process for the preparation of hydrazo derivatives of anthraquinone.

Country Status (1)

Country Link
AT (1) AT96528B (en)

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