CH264506A - Process for the preparation of an acylated p-amino-benzenesulfonamide. - Google Patents
Process for the preparation of an acylated p-amino-benzenesulfonamide.Info
- Publication number
- CH264506A CH264506A CH264506DA CH264506A CH 264506 A CH264506 A CH 264506A CH 264506D A CH264506D A CH 264506DA CH 264506 A CH264506 A CH 264506A
- Authority
- CH
- Switzerland
- Prior art keywords
- amino
- compound
- formula
- reduction
- amino group
- 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
-
- 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
- C07C311/45—Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups at least one of the singly-bound nitrogen atoms being part of any of the groups, X being a hetero atom, Y being any atom, e.g. N-acylaminosulfonamides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
<B>Verfahren zur Herstellung eines</B> acylierten p-Amino-benzolaulfonamids. Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines acylierten p-Amino-benzolsulfonamids. Das Verfahren ist dadurch gekennzeichnet,
dass man eine Verbindung der Formel
EMI0001.0006
auf eine Verbindung der Formel
EMI0001.0007
worin X und Y zwei bei der Reaktion mit Ausnahme einer in einem von ihnen enthal tenen NH-Gruppe sieh abspaltende Reste und R einen durch Reduktion in die Aminogruppe überführbaren Rest bedeuten, einwirken lässt und in der erhaltenen Verbindung den Rest R durch Reduktion in die Aminogruppe über führt.
Die entstandene, neue Verbindung, das p-Amino - benzolsulfon - N1 - (ar-n-propoxy-iso- butyryl)-amid, bildet farblose Kristalle vom Schmelzpunkt 135 bis 136 . Sie lässt sich mit anorganischen oder organischen Basen in Salze überführen. Sie soll therapeutische Verwendung finden.
<I>Beispiel:</I> 33 Teile a-n-Propoxy-isobuttersäureehlorid werden unter Kühlung und Rühren in 100 Teilen Py-ridin gelöst. Dann werden 40 Teile p-Nitro-benzolsulfonamid portionenweise zuge geben und bei 60 bis 70 einige Zeit gerührt, dann auf Eis und Salzsäure gegossen und das sich abscheidende Harz abgetrennt. Der Nitrokörper wird ohne weitere Reinigung nach Bechamp mit Eisen und Salzsäure redu ziert.
Das Reduktionsgemisch wird an schliessend soloalkalisch gestellt, abgesaugt und aus dem Filtrat das p-Amino-benzolsul- fon-N1-(a-n-propoxy-isobutyryl)-amid mit Es-, sigsäure ausgefällt. Durch Umkristallisation aus Alkohol lässt sich die Verbindung rein erhalten; sie schmilzt dann bei 135 bis 136 .
Man kann die Kondensation des p-Nitro- benzolsulfonamids mit a-n-Propoxy-isobutter- säurechlorid anstatt in Pyridin auch in Chlor benzol unter Zusatz von Kupferpulver oder in Nitrobenzol unter Zusatz von Aluminium chlorid durchführen.
Ebensogut kann man von einer Metallverbindung des p-Nitro- benzolsulfonamids ausgehen und diese mit a-n- Propoxy-isobuttersäurechlorid umsetzen. Fer ner kann man p-Nitro-benzolsulfonamid auch mit a-n-Propoxy-buttersäure in Gegenwart von Kondensationsmitteln, z. B. von Phos- phorpentoxyd oder von Phosphorpentachlorid, umsetzen.
Zum gleichen Endprodukt gelangt man auch, wenn man eine Metallverbindung des a-n-Propoxy-buttersäureamids mit einem p- Nitro-benzolsulfohalogenid umsetzt und den erhaltenen Nitrokörper reduziert.
<B> Process for the preparation of an acylated p-amino-benzenesulfonamide. The present patent is a process for the preparation of an acylated p-amino-benzenesulfonamide. The procedure is characterized by
that you can get a compound of the formula
EMI0001.0006
to a compound of the formula
EMI0001.0007
in which X and Y are two radicals which split off in the reaction with the exception of one of them contained NH group and R is a radical which can be converted into the amino group by reduction, and the radical R in the compound obtained is reduced to the amino group over leads.
The resulting new compound, p-amino-benzenesulfone-N1 - (ar-n-propoxy-isobutyryl) amide, forms colorless crystals with a melting point of 135 to 136. It can be converted into salts with inorganic or organic bases. It should find therapeutic use.
<I> Example: </I> 33 parts of a-n-propoxy-isobutyric acid chloride are dissolved in 100 parts of pyridine with cooling and stirring. 40 parts of p-nitrobenzenesulfonamide are then added in portions and the mixture is stirred at 60 to 70 for some time, then poured onto ice and hydrochloric acid and the resin which separates out is separated off. The nitro body is reduced with iron and hydrochloric acid according to Bechamp without further purification.
The reduction mixture is then made solo alkaline, filtered off with suction and the p-amino-benzenesulfon-N1- (a-n-propoxy-isobutyryl) -amide is precipitated from the filtrate with es-, acetic acid. The compound can be obtained in pure form by recrystallization from alcohol; it then melts at 135 to 136.
The condensation of p-nitrobenzenesulfonamide with a-n-propoxy-isobutyric acid chloride can also be carried out in chlorobenzene with the addition of copper powder or in nitrobenzene with the addition of aluminum chloride instead of in pyridine.
You can just as well start from a metal compound of p-nitrobenzenesulfonamide and react this with a-n-propoxy-isobutyric acid chloride. Fer ner can p-nitro-benzenesulfonamide with a-n-propoxy-butyric acid in the presence of condensing agents, eg. B. of phosphorus pentoxide or phosphorus pentachloride, implement.
The same end product is also obtained if a metal compound of a-n-propoxy-butyric acid amide is reacted with a p-nitrobenzenesulfohalide and the nitro body obtained is reduced.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH219520T | 1940-06-21 | ||
CH264506T | 1943-11-05 | ||
CH242285T | 1943-11-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH264506A true CH264506A (en) | 1949-10-15 |
Family
ID=34139174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH264506D CH264506A (en) | 1940-06-21 | 1943-11-05 | Process for the preparation of an acylated p-amino-benzenesulfonamide. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH264506A (en) |
-
1943
- 1943-11-05 CH CH264506D patent/CH264506A/en unknown
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