CH128122A - Process for the preparation of the Bz1-Oxy-Bz2-acetylbenzanthrone. - Google Patents
Process for the preparation of the Bz1-Oxy-Bz2-acetylbenzanthrone.Info
- Publication number
- CH128122A CH128122A CH128122DA CH128122A CH 128122 A CH128122 A CH 128122A CH 128122D A CH128122D A CH 128122DA CH 128122 A CH128122 A CH 128122A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxy
- acetylbenzanthrone
- preparation
- red
- anthrone
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung des Bz1-Oxy-Bz2-acetylbenzanthrons. Gegenstand! der vorliegenden Erfindung ist ein Verfahren zur Darstellung des Bzl- Oxy-Bz2-acetylbenzanthrons, dadurch ge kennzeichnet, dass man Anthron und Oxy- methylenacetessigester der folgenden Formel:
EMI0001.0009
unter Zusatz eines. sauren, Kondensations mittels kondensiert.
<I>Beispiel:</I> 19 Gewichtsteile Anthron löst man in 100 Gewichtsteilen Schwefelsäure von 66 B6 und verdünnt mit 10 Gewichtsteilen Wasser. Dann setzt man eine Lösung von 21 Gewichtsteilen Oxymethylenacetessigester in 30 Gewichtsteilen Eisessig bei etwa<B>60'</B> zu. Die Lösungsfarbe ändert sich von braun gelb über blauviolett nach karminrot. Nach kurzem Nachrühren bei<B>100'</B> gibt man auf Wasser, entzieht dem Rohprodukt durch Al kaIi-Hydrosulfitlösung etwa vorhandenes Anthron und Anthrachinon und trocknet. Zur Reinigung kann aus Nitrobenzol umkristalli siert werden.
Der Körper bildet goldgelbe Nadeln vom Schmelzpunkt 2,95 . Nach Ana lyse und Eigenschaften zu schliessen, liegt hier das B@zl-Oxy-B.z2-acetylbenzanthron vor. In wässerigem Alkali löst es sich mit kar minroter Farbe. Die Lösungsfarbe in kon zentrierter 'Schwefelsäure ist karminrot mit braunroter Fluoreszenz.
Process for the preparation of the Bz1-Oxy-Bz2-acetylbenzanthrone. Object! The present invention is a process for the preparation of Bzl-oxy-Bz2-acetylbenzanthrone, characterized in that anthrone and oxymethylene acetoacetic ester of the following formula:
EMI0001.0009
with the addition of a. acidic, condensation means condensed.
<I> Example: </I> 19 parts by weight of anthrone are dissolved in 100 parts by weight of sulfuric acid of 66 B6 and diluted with 10 parts by weight of water. A solution of 21 parts by weight of oxymethylene acetoacetic ester in 30 parts by weight of glacial acetic acid is then added at about 60 '. The color of the solution changes from brown-yellow through blue-violet to carmine red. After briefly stirring at <B> 100 '</B>, the mixture is poured into water, any anthrone and anthraquinone present are removed from the crude product using alkali hydrosulfite solution and dried. For cleaning, it can be recrystallized from nitrobenzene.
The body forms golden yellow needles with a melting point of 2.95. According to the analysis and properties, this is B@zl-Oxy-B.z2-acetylbenzanthron. In aqueous alkali it dissolves with a carmin-red color. The color of the solution in concentrated sulfuric acid is carmine-red with brown-red fluorescence.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE128122X | 1926-04-03 | ||
CH127266T | 1927-04-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH128122A true CH128122A (en) | 1928-10-01 |
Family
ID=25710838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH128122D CH128122A (en) | 1926-04-03 | 1927-04-02 | Process for the preparation of the Bz1-Oxy-Bz2-acetylbenzanthrone. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH128122A (en) |
-
1927
- 1927-04-02 CH CH128122D patent/CH128122A/en unknown
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