CH159311A - Process for the preparation of a new condensation product of the anthraquinone series. - Google Patents

Process for the preparation of a new condensation product of the anthraquinone series.

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Publication number
CH159311A
CH159311A CH159311DA CH159311A CH 159311 A CH159311 A CH 159311A CH 159311D A CH159311D A CH 159311DA CH 159311 A CH159311 A CH 159311A
Authority
CH
Switzerland
Prior art keywords
preparation
condensation product
anthraquinone series
nitrobenzene
decomposition
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
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 Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH159311A publication Critical patent/CH159311A/en

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  • Nitrogen Condensed Heterocyclic Rings (AREA)

Description

  

  Verfahren zur Darstellung eines neuen Kondensationsproduktes der     Anthrachinonreihe.       Das vorliegende Verfahren betrifft die  Darstellung von     Acetyl-2,4-dibromanthrapyri-          don    und ist dadurch gekennzeichnet,     dass     man     1-Amino-2,4-dibromanthrachinon    mit       Acetessigester    in Gegenwart von Soda und  Nitrobenzol erhitzt. Die neue Verbindung soll  zur Darstellung von Farbstoffen Verwendung  finden.  



  <I>Beispiel:</I>  <B>100</B> Teile     1-Amino-2,4-dibromanthrachi-          non,   <B>1</B> Teil Soda,<B>100</B> Teile     Acetessigester,     <B>50</B> Teile Nitrobenzol werden während<B>1</B> Stun  de zum Sieden erhitzt. Während die     Tein-          peratur    von etwa<B>170 0 0</B> auf 200<B>0</B>     C    ansteigt,  destilliert ein Gemisch von Alkohol und Aceton  ab und das rote Ausgangsprodukt verwan  delt sich nahezu quantitativ in das     Pyridon;     dieses stellt derbe, braune Kristalle vom  Schmelzpunkt<B>333 0</B> (Zersetzung) dar.

   Aus       Nitroberizol    kristallisiert das Produkt     iff    gel  ben     Schüppchen    vom<B>F.</B> P.     837   <B>0</B> (Zersetzung).  



  Das Produkt löst sich in Schwefelsäure  mit gelber Farbe, -welche auf Zusatz von  Borsäure orange wird.         C18H9O8N13r2          Ber.        Br        35,77        %          Gef.        Br        35,73>,   <B>35,52</B>



  Process for the preparation of a new condensation product of the anthraquinone series. The present process relates to the preparation of acetyl-2,4-dibromoanthrapyridone and is characterized in that 1-amino-2,4-dibromoanthraquinone is heated with acetoacetic ester in the presence of soda and nitrobenzene. The new compound will be used to represent dyes.



  <I> Example: </I> <B> 100 </B> parts 1-amino-2,4-dibromoanthraquinone, <B> 1 </B> part soda, <B> 100 </B> parts Acetoacetic ester, <B> 50 </B> parts of nitrobenzene are heated to boiling for <B> 1 </B> hour. While the temperature rises from around <B> 170 0 0 </B> to 200 <B> 0 </B> C, a mixture of alcohol and acetone distills off and the red starting product is converted almost quantitatively into the pyridone ; this represents rough, brown crystals with a melting point of <B> 333 0 </B> (decomposition).

   The product iff yellow flakes from <B> F. </B> P. 837 <B> 0 </B> (decomposition) crystallizes from nitroberizole.



  The product dissolves in sulfuric acid with a yellow color, which turns orange when boric acid is added. C18H9O8N13r2 calc. Br 35.77% found Br 35.73>, <B> 35.52 </B>

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Darstellung von Aeetyl-2,4- dibromanthrapyridon. dadurch gekennzeich net, dass man 1-Ainino-2,4-dibroii)aiitlirachi- non mit Acetessigester in Gegenwart von Soda und Nitrobenzol erhitzt. Das Aeetyl-2,4-dibrom##ttithi#apyi#idoii btellt derbe, braune Kristalle vom Si#hmelzp(ii)tzt. 83.30 (Zersetzung) dar. Aus Nitrobenzol kri stallisiert das Produkt in gelben Schüppchen vom Schmelzpunkt<B>337'</B> (Zersetzung). <B> PATENT CLAIM: </B> Process for the preparation of acetyl-2,4-dibromanthrapyridone. characterized in that 1-ainino-2,4-dibroii) aiitlirachinon is heated with acetoacetate in the presence of soda and nitrobenzene. The aetyl-2,4-dibromine ## ttithi # apyi # idoii produces rough, brown crystals from Si # hmelzp (ii) tzt. 83.30 (decomposition). The product crystallizes from nitrobenzene in yellow flakes with a melting point of <B> 337 '</B> (decomposition). Das Produkt löst sich in Schwefelsäure mit gelber Farbe, welche auf Zwsatz von Borsäure orange wird. Es besitzt die Formel CisH9O3NBr2. Die neue Verbindung soll zur Darstellung von Farbstoffen Verwendung finden. The product dissolves in sulfuric acid with a yellow color, which turns orange when boric acid is added. It has the formula CisH9O3NBr2. The new compound will be used to represent dyes.
CH159311D 1930-07-18 1931-07-17 Process for the preparation of a new condensation product of the anthraquinone series. CH159311A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE159311X 1930-07-18
CH156115T 1931-07-17

Publications (1)

Publication Number Publication Date
CH159311A true CH159311A (en) 1932-12-31

Family

ID=25716694

Family Applications (1)

Application Number Title Priority Date Filing Date
CH159311D CH159311A (en) 1930-07-18 1931-07-17 Process for the preparation of a new condensation product of the anthraquinone series.

Country Status (1)

Country Link
CH (1) CH159311A (en)

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