CH137941A - 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
CH137941A
CH137941A CH137941DA CH137941A CH 137941 A CH137941 A CH 137941A CH 137941D A CH137941D A CH 137941DA CH 137941 A CH137941 A CH 137941A
Authority
CH
Switzerland
Prior art keywords
pyrazolanthrone
preparation
potash
descendant
halobenzanthrone
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 CH137941A publication Critical patent/CH137941A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B5/00—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
    • C09B5/02—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings the heterocyclic ring being only condensed in peri position
    • C09B5/04—Pyrazolanthrones
    • C09B5/06—Benzanthronyl-pyrazolanthrone condensation products

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • 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       Benzantbronyl-pyrazolanthrons    der Formel:  
EMI0001.0004     
    bestehend in der Kondensation von     Pyrazol-          anthron,        2-Halogenbenzanthron    und Pott  asche.

   Das Produkt findet für die Dar  stellung von     Küpenfarbstoffen        Verwendung.     <I>Beispiel:</I>  Aus 22 Gewichtsteilen     Pyrazolanthron     und 22     Gewichtsteilen    Pottasche wird durch  Erhitzen in Nitrobenzol unter Rühren     das     Kalisalz des     Pyrazolanthrüns    gebildet. Nun  werden 26,5 Gewichtsteile 2-Chlorbenzan-    thron zugegeben und die     Masse    während  etwa 10 Stunden bei Kochtemperatur weite  verrührt. Nach dem Erkalten wird filtriert,  mit Nitrobenzol, Alkohol und Wasser ge  waschen und getrocknet. Das     ;so.    gebildete       2-Benzanthronyl-py-l-pyrazolanthron    stellt  ein gelbes.

   Kristallpulver dar, das bei 398  bis 400' C schmilzt und sich in konzen  trierter Schwefelsäure mit gelbroter Farbe  löst.     Im    Gemisch mit dem     isomeren    und  dem Verfahren des Patentes Nr. 136553  erhaltenen     Bz-1-Benzanthronyl-py-l-pyrazol-          anthron    von ähnlichen Eigenschaften er  fährt der Schmelzpunkt eine     wesentliche    De  nression.



  Process for the preparation of a descendant of the pyrazolanthrone. The present invention relates to a process for the preparation of a benzantbronylpyrazolanthrone of the formula:
EMI0001.0004
    consisting of the condensation of pyrazole anthrone, 2-halobenzanthrone and potash.

   The product is used for the presentation of vat dyes. <I> Example: </I> The potash salt of pyrazole anthrone is formed from 22 parts by weight of pyrazole anthrone and 22 parts by weight of potash by heating in nitrobenzene with stirring. Now 26.5 parts by weight of 2-chlorobenzanthrone are added and the mass is further stirred for about 10 hours at the boiling temperature. After cooling, it is filtered, washed with nitrobenzene, alcohol and water and dried. That so. formed 2-benzanthronyl-py-l-pyrazolanthrone represents a yellow.

   Crystal powder is that melts at 398 to 400 'C and dissolves in concentrated sulfuric acid with a yellow-red color. When mixed with the isomeric and the process of Patent No. 136553 obtained Bz-1-benzanthronyl-py-l-pyrazol-anthrone of similar properties, the melting point experiences a substantial de nression.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 2-Benz- anthronyl-py-l-pyrazolanthron, dadurch ge kennzeichnet, dass man Pyrazolanthron, 2 Halogenbenzanthron und Pottasche bei er höhter Temperatur aufeinander einwirken l ässt. Das Produkt bildet ein gelbes, bei 398 bis 400 schmelzendes Pulver, das sich gelbstichigrot in konzentrierter Schwefel säure döst. UNTERANSPRüCHE 1. PATENT CLAIM: Process for the preparation of 2-benzanthronyl-py-l-pyrazolanthrone, characterized in that pyrazolanthrone, 2 halobenzanthrone and potash are allowed to act on one another at an elevated temperature. The product forms a yellow powder, melting at 398 to 400, which dozes yellowish-red in concentrated sulfuric acid. SUBCLAIMS 1. Verfahren nach Patentanspruch., dadurch gekennzeichnet, dass man die Umsetzung bei einer Temperatur von etwa. 200 be wirkt. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet,, dass man @ Pyrazolanthron mit Pottasche umsetzt und auf das so er haltene Kaliumsalz des Pyrazolanthrons 2-Halogenbenzanthron einwirken -lässt. Process according to claim., Characterized in that the reaction is carried out at a temperature of about. 200 be effective. 2. Process according to claim, characterized in that @ pyrazole anthrone is reacted with potash and 2-halobenzanthrone is allowed to act on the potassium salt of the pyrazole anthrone thus obtained.
CH137941D 1927-10-22 1927-10-22 Process for the preparation of a descendant of the pyrazolanthrone. CH137941A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH133473T 1927-10-22
CH137941T 1927-10-22

Publications (1)

Publication Number Publication Date
CH137941A true CH137941A (en) 1930-01-31

Family

ID=25712070

Family Applications (1)

Application Number Title Priority Date Filing Date
CH137941D CH137941A (en) 1927-10-22 1927-10-22 Process for the preparation of a descendant of the pyrazolanthrone.

Country Status (1)

Country Link
CH (1) CH137941A (en)

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