CH127168A - Process for the preparation of 1-aminoanthraquinone-2-methylketone. - Google Patents

Process for the preparation of 1-aminoanthraquinone-2-methylketone.

Info

Publication number
CH127168A
CH127168A CH127168DA CH127168A CH 127168 A CH127168 A CH 127168A CH 127168D A CH127168D A CH 127168DA CH 127168 A CH127168 A CH 127168A
Authority
CH
Switzerland
Prior art keywords
preparation
methylketone
aminoanthraquinone
red
amino
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 CH127168A publication Critical patent/CH127168A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung von     1-Aminoanthraehinon-2-methylketon.       Gegenstand dieser Erfindung ist ein Ver  fahren zur Darstellung von     1-Aminoanthra-          chinon-2-methylketon,    welches dadurch ge  kennzeichnet ist, dass man     Anthrachinon-l..    2.       methylisoxazol    mit reduzierenden Mitteln be  handelt.  



  Das     1-Amino-2-acetylanthrachinon    soll als  Zwischenprodukt für die Darstellung von  Farbstoffen Verwendung finden.  



  <I>Beispiel:</I>  1 Gewichtsteil des durch Einwirkung von  rauchender Schwefelsäure auf     1-Nitro-2-          äthylanthrachinon    erhältlichen     Anthrachinon-          1.2-methylisoxazols    wird mit 2 Gewichts  teilen     Natriumhydrosulfit    in     wässerig-am-          moniakalischer    Suspension unter     Luftab-          schluss    so lange im Wasserbade erwärmt, bis  Lösung     erfolgt    ist. Beim Einleiten von Luft  in die filtrierte rotgelbe Lösung scheidet sich  das     1-Aminoanthrachinon-2-methylketon    in  roten Flocken aus.

   Es kristallisiert aus Eis-         essig    in derben, roten, bei 220   C schmelzen  den Nadeln. Die     ätzalkalische        Hydrosulfit-          küpe    ist braun gefärbt.



  Process for the preparation of 1-aminoanthraquinone-2-methylketone. This invention relates to a process for the preparation of 1-aminoanthraquinone-2-methylketone, which is characterized in that anthraquinone-1 .. 2. methylisoxazole is treated with reducing agents.



  The 1-amino-2-acetylanthraquinone is said to be used as an intermediate for the preparation of dyes.



  <I> Example: </I> 1 part by weight of the anthraquinone 1,2-methylisoxazole obtainable by the action of fuming sulfuric acid on 1-nitro-2-ethylanthraquinone is mixed with 2 parts by weight of sodium hydrosulfite in an aqueous ammoniacal suspension with the exclusion of air for so long warmed in a water bath until solution has occurred When air is introduced into the filtered red-yellow solution, the 1-aminoanthraquinone-2-methyl ketone separates out in red flakes.

   It crystallizes from glacial acetic acid in coarse, red needles that melt at 220 ° C. The caustic-alkaline hydrosulfite vat is colored brown.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 1-Anino- anthrachinon-2-me@thylketon, dadurch ge kennzeichnet, dass man Anthraehinon-1.2- methylisoxazol mit reduzierenden Mitteln be handelt. Das Produkt kristallisiert aus Eisessig in derben, roten, bei 220' schmelzenden Na deln. Amm.oniakalische Hydrosulfitlösung löst es mit rotgelber, ätzalkalische mit brau ner Farbe. Das 1-Amino-2-acetylanthrachinon soll als Zwischenprodukt für die Darstellung von Farbstoffen Verwendung finden. PATENT CLAIM: Process for the preparation of 1-amino anthraquinone-2-methylketone, characterized in that anthraehinone-1,2-methylisoxazole is treated with reducing agents. The product crystallizes from glacial acetic acid in coarse, red needles that melt at 220 '. Ammoniacal hydrosulphite solution dissolves it with red-yellow, caustic alkaline with brown color. The 1-amino-2-acetylanthraquinone is said to be used as an intermediate for the preparation of dyes.
CH127168D 1926-03-08 1927-03-07 Process for the preparation of 1-aminoanthraquinone-2-methylketone. CH127168A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE127168X 1926-03-08
CH125967T 1927-03-07

Publications (1)

Publication Number Publication Date
CH127168A true CH127168A (en) 1928-08-16

Family

ID=25710586

Family Applications (1)

Application Number Title Priority Date Filing Date
CH127168D CH127168A (en) 1926-03-08 1927-03-07 Process for the preparation of 1-aminoanthraquinone-2-methylketone.

Country Status (1)

Country Link
CH (1) CH127168A (en)

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