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CH144306A - Process for the preparation of a derivative of the pyranthrone. - Google Patents

Process for the preparation of a derivative of the pyranthrone.

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Publication number
CH144306A
CH144306A CH144306DA CH144306A CH 144306 A CH144306 A CH 144306A CH 144306D A CH144306D A CH 144306DA CH 144306 A CH144306 A CH 144306A
Authority
CH
Switzerland
Prior art keywords
pyranthrone
alkali
derivative
preparation
dissolves
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 CH144306A publication Critical patent/CH144306A/en

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  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)

Description

  

  Verfahren zur Darstellung eines Derivates des     Pyranthrons.       Es wurde gefunden, dass man ein wert  volles Derivat des     Pyranthrons    erhalten kann,  wenn man     Monoaminopyranthron,    erhältlich  durch Nitrieren von     Pyranthron    in     Nitroben-          zol        mit        95        %iger        Salpetersäure        bei        120-1500     und Reduktion des so erhaltenen     Mononitro-          pyranthrons    mit     Natriumsulfid     <RTI  

   ID="0001.0016">   diazotiert    und  die erhaltene     Diazoverbindung    verkocht.  



  Die erhaltene neue     Verbindung,    ein     AZono-          oxypyranthron,    löst sich mit blauer Farbe  in Schwefelsäure, ist in     wässrigem    Alkali       schwer    löslich, löst sich in alkoholischem  Alkali mit grüner Farbe und färbt Baum  wolle aus rotvioletter     Küpe    in     alkaliunechten     braunen Tönen.  



  <I>Beispiel: .</I>  10 Teile     AZonoaminopyranthron,    darge  stellt gemäss den Angaben des     schweiz.    Pa  tentes 61921, werden in Schwefelsäure gelöst  und in der üblichen Weise mit     Nitrose    (Lö  sung von     N209    in konzentrierter Schwefel  säure) oder Nitrit     diazotiert.    Die erhaltene       Diazosulfatlösung    wird unter     Rübren    bis  1200 0 erhitzt, wobei Stickstoff entweicht,    Die Reaktion ist beendet, sobald eine ent  nommene Probe mit Alkali einen Umschlag  nach grün zeigt. Nach dem Erkalten giesst  man auf Eis, saugt ab und trocknet.



  Process for the preparation of a derivative of the pyranthrone. It has been found that a valuable derivative of pyranthrone can be obtained if monoaminopyranthrone, obtainable by nitrating pyranthrone in nitrobenzene with 95% nitric acid at 120-1500 and reducing the mononitropyranthrone thus obtained with sodium sulfide <RTI

   ID = "0001.0016"> diazotized and the diazo compound obtained is boiled off.



  The new compound obtained, an azo-oxypyranthrone, dissolves in sulfuric acid with a blue color, is sparingly soluble in aqueous alkali, dissolves in alcoholic alkali with a green color and dyes cotton from red-violet vat in non-alkali brown tones.



  <I> Example:. </I> 10 parts AZonoaminopyranthron, represented according to the information of Switzerland. Pa tentes 61921 are dissolved in sulfuric acid and diazotized in the usual way with nitrous (solution of N209 in concentrated sulfuric acid) or nitrite. The diazosulfate solution obtained is heated to 1200 ° with stirring, with nitrogen escaping. The reaction is ended as soon as a sample with alkali that has been taken turns green. After cooling, it is poured onto ice, filtered off with suction and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Derivates des Pyranthrons, dadurch gekennzeichnet; dass man Monoaminopyrantbron, erhältlich durch Nitrieren von Pyranthron in Nitroben- zol mit 95 %iger Salpetersäure bei 120-1500 und Reduktion des so erhaltenen AZononitro- pyranthrons mit Natriumsulfid diazotiert und die PATENT CLAIM: Process for the preparation of a derivative of pyranthrone, characterized in that; that monoaminopyrantbrone, obtainable by nitrating pyranthrone in nitrobenzene with 95% nitric acid at 120-1500 and reduction of the AZononitropyranthrons thus obtained with sodium sulfide and diazotized erhaltene Diazoverbindung verkocht. Die erhaltene neue Verbindung, ein Mono- ogypyranihron, löst sich mit blauer Farbe in Schwefelsäure, ist in wässrigem Alkali schwer löslich, löst sich in alkoholischem Alkali-mit grüner Farbe, und färbt Baumwolle aus rot violetter güpe in alkaliunechten braunen Tönen. obtained diazo compound boiled off. The new compound obtained, a mono-ogypyranihron, dissolves in sulfuric acid with a blue color, is sparingly soluble in aqueous alkali, dissolves in alcoholic alkali with a green color, and dyes cotton of red-violet güpe in alkali-imperfect brown tones.
CH144306D 1928-07-28 1929-06-14 Process for the preparation of a derivative of the pyranthrone. CH144306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE144306X 1928-07-28

Publications (1)

Publication Number Publication Date
CH144306A true CH144306A (en) 1930-12-31

Family

ID=5670147

Family Applications (1)

Application Number Title Priority Date Filing Date
CH144306D CH144306A (en) 1928-07-28 1929-06-14 Process for the preparation of a derivative of the pyranthrone.

Country Status (1)

Country Link
CH (1) CH144306A (en)

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