CH139364A - Process for the preparation of a descendant of the pyrazolanthrone. - Google Patents

Process for the preparation of a descendant of the pyrazolanthrone.

Info

Publication number
CH139364A
CH139364A CH139364DA CH139364A CH 139364 A CH139364 A CH 139364A CH 139364D A CH139364D A CH 139364DA CH 139364 A CH139364 A CH 139364A
Authority
CH
Switzerland
Prior art keywords
pyrazolanthrone
methyl
preparation
brownish
descendant
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 CH139364A publication Critical patent/CH139364A/en

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  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

  

  Verfahren zur Darstellung eines Abkömmlings des     Pyrazolanthrons.       Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Darstellung eines Benz  anthronyl-tnethylpyrazolanthrons der Formel  
EMI0001.0002     
    welches dadurch gekennzeichnet ist, dass  man ein     Alkalisalz    des     4-Methyl-pyrazolan-          throns    mit Bz.     1-Nitrobenzanthron    bei erhöhter  Temperatur umsetzt.  



       Beispiel:     23 Gewichtsteile     4-Methyl-pyrazolanthron     werden mit 15 Gewichtsteilen entwässertem         Kaliumcarbonat    innig vermahlen und in     2"00     Gewichtsteile Nitrobenzol eingerührt. Man       verrührt    zunächst bei gewöhnlicher Tempera  tur, dann einige Stunden unter Kochen, wobei  die Mischung einheitlich rot wird. Nach  Zufügen von 31 Gewichtsteilen Bz.     1-          Nitrobenzanthron    hält man 10 Stunden unter  weiterem Rühren im Sieden. Das Reaktions  produkt wird nach dem Erkalten abgesaugt,  zunächst mit     Nitrobenzol,    dann mit Sprit  und heissem Wasser gewaschen und getrocknet.

    Man erhält ein braungelbes Kondensations  produkt vom Schmelzpunkt<B>330'.</B> Konzen  trierte Schwefelsäure löst mit braunroter  Farbe ohne Fluoreszenz. Das Endprodukt  soll als Ausgangsmaterial zur Darstellung  von     Farbstoffen    verwendet werden.



  Process for the preparation of a descendant of the pyrazolanthrone. The present invention relates to a process for the preparation of a benzanthronyl-methylpyrazole anthrone of the formula
EMI0001.0002
    which is characterized in that an alkali salt of 4-methyl-pyrazolan thrones with Bz. 1-nitrobenzanthrone converts at elevated temperature.



       Example: 23 parts by weight of 4-methylpyrazolanthrone are intimately ground with 15 parts by weight of dehydrated potassium carbonate and stirred into 2,000 parts by weight of nitrobenzene 31 parts by weight of 1-nitrobenzanthrone are kept at the boil for 10 hours with continued stirring. After cooling, the reaction product is filtered off with suction, washed first with nitrobenzene, then with fuel and hot water and dried.

    A brownish-yellow condensation product with a melting point of <B> 330 'is obtained. </B> Concentrated sulfuric acid dissolves with a brownish-red color without fluorescence. The end product should be used as a starting material for the representation of dyes.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von Bz. 1- Benzanthronyl - Py -1 - (4 - methyl -pyrazolan- thron), der folgenden Formel: EMI0002.0001 dadurch gekennzeichnet, dass man ein Alkali salz des 4-Methyl-pyrazolanthror)s mit Bz-l- Nitrobenza,nthron bei erhöhter Temperatur umsetzt. Das Produkt bildet ein braungelbes Pul ver, das bei<B>330'</B> schmilzt. Konzentrierte Schwefelsäure löst mit braunroter Farbe ohne Fluoreszenz. PATENT CLAIM: Method for the representation of Bz. 1- Benzanthronyl - Py -1 - (4 - methyl -pyrazolanthrone), of the following formula: EMI0002.0001 characterized in that an alkali salt of 4-methyl-pyrazolanthrone) s is reacted with Bz-1-nitrobenza, nthrone at elevated temperature. The product forms a brownish-yellow powder that melts at <B> 330 '</B>. Concentrated sulfuric acid dissolves with a brownish-red color without fluorescence. Es findet als Ausgangs material zur Darstellung von Farbstoffen Verwendung. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man 4-Methyl-pyrazol- anthronkalium mit Bz-l-Nitrobenzanthron bei erhöhter Temperatur umsetzt. It is used as a starting material for the representation of dyes. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that 4-methyl-pyrazole-anthrone potassium is reacted with Bz-l-nitrobenzanthrone at an elevated temperature.
CH139364D 1927-07-18 1928-07-03 Process for the preparation of a descendant of the pyrazolanthrone. CH139364A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE139364X 1927-07-18
CH133473T 1927-10-22

Publications (1)

Publication Number Publication Date
CH139364A true CH139364A (en) 1930-04-15

Family

ID=25712079

Family Applications (1)

Application Number Title Priority Date Filing Date
CH139364D CH139364A (en) 1927-07-18 1928-07-03 Process for the preparation of a descendant of the pyrazolanthrone.

Country Status (1)

Country Link
CH (1) CH139364A (en)

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