CH199682A - Process for the preparation of sulfanilic acid-4-aminoanilide. - Google Patents
Process for the preparation of sulfanilic acid-4-aminoanilide.Info
- Publication number
- CH199682A CH199682A CH199682DA CH199682A CH 199682 A CH199682 A CH 199682A CH 199682D A CH199682D A CH 199682DA CH 199682 A CH199682 A CH 199682A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- aminoanilide
- preparation
- sulfanilic acid
- sulfanilic
- 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 Snlfanilsäure-4-aminoanilid. Es wurde gefunden, dass Anilide der Sulfanils:äure aus aromatischen Diaminen in vivo eine hervorragende Wirkung gegen Streptokokken aufweisen. Anilide der Sulf- anilsäure aus aromatischen Diaminen waren bisher nicht bekannt.
Ihre Herstellung er folgt durch Einwirkung von Acetylsulfanil- säurehalogeniden auf aromatische Diamine oder auf Monoacetylverbindungen von aro matischen Diaminen und na;chheriger Ab spaltung der Acetylgruppen oder durch Um setzung von Acetylsulfanilsäurehalogeniden mit aromatischen Nitroaminen, Reduktion und Abspaltung der Acetylgruppen.
Gegenstand,des vorliegenden Patentes ist ein Verfahren zur Darstellung von Sulfanil- säure-4-aminoanilid, welches dadurch ge kennzeichnet ist, dass man ein Acylsulfanil- säurehalogenid auf p-Nitranilin einwirken lässt und im so erhaltenen Produkt in be liebiger Reihenfolge die Nitrogruppe redu ziert und die Acylgruppe abspaltet.
Das \Sulfanilsäure-4-aminoanilid schmilzt bei<B>138'.</B> Es ist ziemlich löslich in Alkohol und iVIethylalkoh.ol und löst sich leicht in Säuren und Laugen. -Die neue Verbindung soll als Arzneimittel verwendet werden.
<I>Beispiel 1:</I> 35 Teile fast trockenes Propionylsulfanil- säurechlorid, 25 Teile p-Nitranilin und 1'5 Teile wasserfreies Natriumacetat werden gut gemischt und auf<B>20-30'</B> erhitzt. Nach dem Erkalten digeriert man die Masse mit 250 Teilen 10%iger Natronlauge und saugt das unveränderte, ungelöste p-Nitranilin ab.
Aus dem Filtrat fällt man das Propionylsulfanil- säure-4-nitroanilid durch Säurezusatz. Dieses wird in methylalkoholischer Suspension mit Wasserstoff bei Gegenwart eines Hydrie- rungskatalyGators behandelt. Man erhält das Propionylsulf anilsäure - 4 - aminoanilid, das man durch Kochen mit verdünnter Lauge oder Säure zum Sulfanilsäure-4-aminoanilid verseift.
Beispiel <I>2:</I> 35 Teile fast trockenes Benzoylsulfanil- säurechlorid, 20 Teile p-Nitranilin und 10 Teile wasserfreies Natriumacetat werden nach dem Mischen auf 110-130' erhitzt.
Nach Beendigung der Kondensation gibt man 250 Teile<B>10%</B> Natronlauge hinzu und kocht zwecks Abspaltung des Benzoylrestes 1-2 Stunden am Rückflusskühler. Dann lässt man erkalten und filtriert das unveränderte p-Nitranilin ab. Das Filtrat wird durch Säurezusatz neutralisiert.
Das rohe ,Sulfanil- säure-4-nitroanilid wird in alkalischer oder saurer Lösung durch Erwärmen mit Zink staub zum Sulfanilsäure-4-aminoanilid redu- ziert und verseift.
Process for the preparation of sulfanilic acid-4-aminoanilide. It has been found that anilides of sulfanilic acids from aromatic diamines have an excellent action against streptococci in vivo. Anilides of sulfanilic acid from aromatic diamines were not previously known.
They are produced by the action of acetylsulfanilic acid halides on aromatic diamines or on monoacetyl compounds of aromatic diamines and subsequent cleavage of the acetyl groups or by reaction of acetylsulfanilic acid halides with aromatic nitroamines, reduction and cleavage of the acetyl groups.
The subject of the present patent is a process for the preparation of sulfanilic acid-4-aminoanilide, which is characterized in that an acylsulfanilic acid halide is allowed to act on p-nitroaniline and the nitro group is reduced in any order in the product thus obtained and splitting off the acyl group.
The \ sulfanilic acid-4-aminoanilide melts at <B> 138 '. </B> It is quite soluble in alcohol and iVIethylalkoh.ol and easily dissolves in acids and alkalis. -The new compound is intended to be used as a medicine.
<I> Example 1: </I> 35 parts of almost dry propionylsulfanilic acid chloride, 25 parts of p-nitroaniline and 1'5 parts of anhydrous sodium acetate are mixed well and heated to <B> 20-30 '</B>. After cooling, the mass is digested with 250 parts of 10% sodium hydroxide solution and the unchanged, undissolved p-nitroaniline is filtered off with suction.
The propionylsulfanilic acid 4-nitroanilide is precipitated from the filtrate by adding acid. This is treated in a methyl alcoholic suspension with hydrogen in the presence of a hydrogenation catalyst. Propionylsulfanilic acid - 4 - aminoanilide is obtained, which is saponified by boiling with dilute lye or acid to form sulfanilic acid-4-aminoanilide.
Example <I> 2: </I> 35 parts of almost dry benzoylsulfanilic acid chloride, 20 parts of p-nitroaniline and 10 parts of anhydrous sodium acetate are heated to 110-130 'after mixing.
After the condensation has ended, 250 parts of 10% sodium hydroxide solution are added and the mixture is boiled in a reflux condenser for 1-2 hours in order to split off the benzoyl radical. It is then allowed to cool and the unchanged p-nitroaniline is filtered off. The filtrate is neutralized by adding acid.
The crude, sulfanilic acid 4-nitroanilide is reduced to sulfanilic acid 4-aminoanilide in an alkaline or acidic solution by heating with zinc dust and then saponified.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH191673T | 1936-05-28 | ||
CH199682T | 1936-11-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH199682A true CH199682A (en) | 1938-08-31 |
Family
ID=25722159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH199682D CH199682A (en) | 1936-05-28 | 1936-11-05 | Process for the preparation of sulfanilic acid-4-aminoanilide. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH199682A (en) |
-
1936
- 1936-11-05 CH CH199682D patent/CH199682A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH199682A (en) | Process for the preparation of sulfanilic acid-4-aminoanilide. | |
CH195177A (en) | Process for the preparation of sulfanilic acid-4-aminoanilide. | |
CH194683A (en) | Process for the preparation of sulfanilic acid 2-methyl-5-aminoanilide. | |
CH191673A (en) | Process for the preparation of sulfanilic acid-4-aminoanilide. | |
CH199683A (en) | Process for the preparation of sulfanilic acid-4-aminoanilide. | |
CH194684A (en) | Process for the preparation of sulfanilic acid-3-aminoanilide. | |
CH207452A (en) | Process for the preparation of a condensation product. | |
CH215336A (en) | Process for the preparation of an aminoarylsulfoxide. | |
CH194681A (en) | Process for the preparation of sulfanilic acid-4-aminoanilide. | |
CH194682A (en) | Process for the preparation of sulfanilic acid-4-aminoanilide. | |
CH194685A (en) | Process for the preparation of sulfanilic acid-4-dimethyl-aminoanilide. | |
CH194680A (en) | Process for the preparation of sulfanilic acid-4-amino-anilide. | |
CH186667A (en) | Process for the preparation of 1-phenyl-N-methyl-N-6'-methoxy-3'-methyl-benzyl-2-aminopropanol-1-chlorohydrate. | |
CH207449A (en) | Process for the preparation of a condensation product. | |
CH236178A (en) | Process for the preparation of p-aminobenzenesulfonyl-butylthiourea. | |
CH199910A (en) | Process for the preparation of N-methylsulfanilic acid-4-aminoanilide. | |
CH199686A (en) | Process for the preparation of N-methylsulfanilic acid-4-aminoanilide. | |
CH168022A (en) | Process for the production of a vat dye. | |
CH185837A (en) | Process for the production of a new azo dye. | |
CH198052A (en) | Process for the preparation of a quaternary aminoacetic acid amide derivative. | |
CH185836A (en) | Process for the production of a new azo dye. | |
CH175234A (en) | Process for the preparation of 4-amino-3-ethoxy-4'-methoxy-diphenylamine. | |
CH207450A (en) | Process for the preparation of a condensation product. | |
CH195466A (en) | Process for the preparation of sulfanilic acid-4-aminoanilide. | |
CH199684A (en) | Process for the preparation of sulfanilic acid-3-aminoanilide. |