CH144306A - Process for the preparation of a derivative of the pyranthrone. - Google Patents
Process for the preparation of a derivative of the pyranthrone.Info
- 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
Links
Landscapes
- Plural Heterocyclic Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic 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)
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) |
-
1929
- 1929-06-14 CH CH144306D patent/CH144306A/en unknown
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