CH195466A - Process for the preparation of sulfanilic acid-4-aminoanilide. - Google Patents
Process for the preparation of sulfanilic acid-4-aminoanilide.Info
- Publication number
- CH195466A CH195466A CH195466DA CH195466A CH 195466 A CH195466 A CH 195466A CH 195466D A CH195466D A CH 195466DA CH 195466 A CH195466 A CH 195466A
- Authority
- CH
- Switzerland
- Prior art keywords
- aminoanilide
- sulfanilic acid
- acid
- preparation
- catalyst
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C311/00—Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
- C07C311/30—Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups
- C07C311/37—Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups having the sulfur atom of at least one of the sulfonamide groups bound to a carbon atom of a six-membered aromatic ring
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
Verfahren zur Darstellung von Sulfanilsäure-4-aminoanilid. Es wurde gefunden, dass Anilide aus Sulfanilsäure und aromatischen Diaminen in vivo eine hervorragende Wirkung gegen Streptokokken aufweisen. Anillde aus Sulf- anilsäure und aromatischen Diaminen waren bisher nicht bekannt.
Ihre Darstellung kann -dadurch erfolgen, ,dass man Acylsulfanil- säurehalogenide auf aromatische Diamine oder Monoacylverbindungen von aromatischen Aminen einwirken lässt und,die Acylgruppen abspaltet oder Acylsulfanilsäurehalogenide mit aromatischen Nitroaminen umsetzt, re duziert und die Acylgruppen abspaltet.
Gegenstand des vorliegenden Patentes ist ein Verfahren zur Darstellung von Sulfanil- säure-4-aminoanilid, welches dadurch ge kennzeichnet ist, dass man ein p-Halogen- benzolsulfonsäure-4-nitroanilid mit Ammo niak in Gegenwart von Katalysatoren, wie Naturkupfer oder Kupfersalzen, zum Sulf- anilsäure-4-nitroanilid umsetzt und die Ni- trogruppe im so erhaltenen Produkt redu ziert.
Das -Sulfanilsäure-4-aminoanilicl schmilzt bei<B>138'.</B> Es ist ziemlich löslich .in Äthyl- und Methylalkohol und löst ,sich leicht in Säuren und Laugen. Die neue Verbindung soll als Arzneimittel verwendet werden.
<I>Beispiel:</I> 6 Teile p-Chlorbenzolsulfonsäure-4-nitro- anilid (hergestellt aus p-Chlorbenzols@fo- chlorid und p-Nitranilin F. P.161 ), 0,3 Teile Kupferchlorür und 20 Teile konzen triertes Ammoniak werden 10 bis 12 Stunden auf 160 bis<B>170'</B> erhitzt, dann gibt man Natronlauge im Überschuss zu und filtriert Ungelöstes ab.
Die alkalische Lösung wird durch Säurezusatz neutralisiert und das aus fallende Rohprodukt abgesaugt. Man löst es in heisser, verdünnter Salzsäure und fil triert vom nicht umgesetzten p-Chlorbenzol- sulfonsäure-4-nitroanilid ab. Das Filtrat wird neutralisiert und das ausfallende Sulfanil- säure-4-nitroanilid aus verdünntem Methyl alkohol umkristallisiert. F. P.<B>167</B> .
Das Sulfanilsäure-4-nitroanilid wird in Methylalkohol gelöst, bei Gegenwart eines Nickelkatalysators hydriert und das entstan dene Sulfanilsäure-4-aminoanilid ans 'Wasser umkristallisiert.
Process for the preparation of sulfanilic acid-4-aminoanilide. It has been found that anilides of sulfanilic acid and aromatic diamines have an excellent effect against streptococci in vivo. Anillides made from sulfanilic acid and aromatic diamines were not previously known.
They can be represented by letting acylsulfanilic acid halides act on aromatic diamines or monoacyl compounds of aromatic amines and splitting off the acyl groups or reacting acylsulfanilic acid halides with aromatic nitroamines, reducing them and splitting off the acyl groups.
The present patent is a process for the preparation of sulfanilic acid 4-aminoanilide, which is characterized in that a p-halobenzenesulfonic acid 4-nitroanilide with ammonia in the presence of catalysts such as natural copper or copper salts, for Sulphanilic acid 4-nitroanilide is converted and the nitro group in the product thus obtained is reduced.
The -sulfanilic acid-4-aminoanilicl melts at <B> 138 '. </B> It is quite soluble in ethyl and methyl alcohol and dissolves easily in acids and alkalis. The new compound is intended to be used as a medicine.
<I> Example: </I> 6 parts of p-chlorobenzenesulfonic acid-4-nitro-anilide (made from p-chlorobenzene @ fo-chloride and p-nitroaniline FP161), 0.3 part of copper chloride and 20 parts of concentrated ammonia Heated for 10 to 12 hours to 160 to <B> 170 '</B>, then excess sodium hydroxide solution is added and undissolved material is filtered off.
The alkaline solution is neutralized by the addition of acid and the crude product which falls off is suctioned off. It is dissolved in hot, dilute hydrochloric acid and the unreacted p-chlorobenzenesulfonic acid 4-nitroanilide is filtered off. The filtrate is neutralized and the precipitating sulfanilic acid 4-nitroanilide is recrystallized from dilute methyl alcohol. F. P. <B> 167 </B>.
The sulfanilic acid 4-nitroanilide is dissolved in methyl alcohol, hydrogenated in the presence of a nickel catalyst and the resulting sulfanilic acid 4-aminoanilide is recrystallized from the water.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH195466T | 1937-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH195466A true CH195466A (en) | 1938-01-31 |
Family
ID=4439953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH195466D CH195466A (en) | 1937-02-19 | 1937-02-19 | Process for the preparation of sulfanilic acid-4-aminoanilide. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH195466A (en) |
-
1937
- 1937-02-19 CH CH195466D patent/CH195466A/en unknown
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