CH183916A - Process for producing an azo compound. - Google Patents
Process for producing an azo compound.Info
- Publication number
- CH183916A CH183916A CH183916DA CH183916A CH 183916 A CH183916 A CH 183916A CH 183916D A CH183916D A CH 183916DA CH 183916 A CH183916 A CH 183916A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo compound
- acid amide
- producing
- acetic acid
- coupling
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung einer Azoverbindung. Das Hauptpatent betrifft ein Verfahren zur Herstellung einer Azoverbindung, die durch ihre bakterizide Wirkung ausgezeich net ist.
Gegenstand des vorliegenden Patentes ist ein Verfahren zur Darstellung des 2-Amino- 4-oxyazobenzol-4'-sulfonsäureamids. Das Ver fahren ist dadurch gekennzeichnet, dass man die Diazoverbindung des 4-Aminobenzolsulfon- amids mit 3-Aminophenol kuppelt.
Die Kupp lung bewirkt man zweckmässig in Gegenwart von verdünnter Alkalilauge. Aus der Reak tionsmischung lässt sich dasgebildete 2-Amino- 4-oxyazobeDzol-4'-sulfonsäureamid durch ver dünnte Essigsäure in Form eines braunroten Niederschlages abscheiden. Nach dem Um fällen aus Natronlauge mit Essigsäure hat es den Schinelzkunkt 106 . Mit Mineral säuren bildet die neue Azoverbindung Salze, zum Beispiel mit Salzsäure ein Hydrochlorid.
Das neue Produkt soll auf Grund seiner bakteriziden Eigenschaften pharmazeutische Verwendung finden. Beispiel: 20,8g Hydrochlorid des 4-Aminobenzol- sulfonsäureamids werden in salzsaurer Lö sung mit 6,9 g Natriumnitrit dianotiert. Zur Diazolösung gibt man eine Lösung von 10,9 g 3-Aminophenol in überschüssigerNatronlauge. Die Kupplung tritt sofort ein.
Aus der kräftig rotbraunen Lösung wird mit verdünnter Essigsäure das 2-Amirio-4- oxyazobenzol-4'-sulfonsäureamid als brauner Niederschlag erhalten, der nach dem Umfällen aus Natronlauge mit Essigsäure den F. 106 hat.
Process for producing an azo compound. The main patent relates to a process for the production of an azo compound which is distinguished by its bactericidal effect.
The present patent relates to a process for the preparation of 2-amino-4-oxyazobenzene-4'-sulfonic acid amide. The process is characterized in that the diazo compound of 4-aminobenzenesulfonamide is coupled with 3-aminophenol.
The coupling is expediently effected in the presence of dilute alkali. The 2-amino-4-oxyazobeDzol-4'-sulfonic acid amide formed can be separated from the reaction mixture in the form of a brownish-red precipitate using dilute acetic acid. After being precipitated from caustic soda with acetic acid, it has the Schinelz point 106. The new azo compound forms salts with mineral acids, for example a hydrochloride with hydrochloric acid.
Due to its bactericidal properties, the new product will find pharmaceutical use. Example: 20.8 g of the hydrochloride of 4-aminobenzenesulfonic acid amide are dianotized with 6.9 g of sodium nitrite in a hydrochloric acid solution. A solution of 10.9 g of 3-aminophenol in excess sodium hydroxide solution is added to the diazo solution. The clutch occurs immediately.
2-Amirio-4-oxyazobenzene-4'-sulfonic acid amide is obtained as a brown precipitate from the strong red-brown solution with dilute acetic acid, which has a melting point of 106 after reprecipitation from sodium hydroxide solution with acetic acid.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH173540T | 1933-12-16 | ||
CH183916T | 1934-09-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH183916A true CH183916A (en) | 1936-04-30 |
Family
ID=25719360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH183916D CH183916A (en) | 1933-12-16 | 1934-09-13 | Process for producing an azo compound. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH183916A (en) |
-
1934
- 1934-09-13 CH CH183916D patent/CH183916A/en unknown
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