CH264504A - 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
- CH264504A CH264504A CH264504DA CH264504A CH 264504 A CH264504 A CH 264504A CH 264504D A CH264504D A CH 264504DA CH 264504 A CH264504 A CH 264504A
- Authority
- CH
- Switzerland
- Prior art keywords
- compound
- amino
- reduction
- formula
- radical
- 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
Verfahren zur Herstellung eines acylierten p-Amino-benzolsulfonamids. 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 sich 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 - Ni - (a@ n-propoxy - pro- pionyl)-amid, bildet farblose Kristalle vom Schmelzpunkt 140". Sie lässt sich mit anor ganischen oder organischen Basen in Salze überführen. Sie soll therapeutische Verwen dung finden.
Beispiel: 30 Teile a-n-Propoxy-propionsäurechlorid werden unter Kühlung und Rühren in 100 Teilen Pyridin gelöst. Dann werden 40 Teile p-Nitrobenzolsulfonamid portionenweise zuge geben und bei 60 bis 70 einige Zeit gerührt, dann auf Eis und Salzsäure gegossen und das sieh abscheidende Harz abgetrennt. Der Nitro- körper wird ohne weitere Reinigung nach Bechamp mit Eisen und Salzsäure reduziert.
Das Reduktionsgemisch wird anschliessend soloalkalisch gestellt, abgesaugt und aus dem Filtrat das n-Amino - benzolsulfon - N1 - (a-p- propoxy-propionyl)-amid mit Essigsäure aus gefällt. Durch Umkristallisation aus Alkohol lässt sich die Verbindung rein erhalten; sie schmilzt dann bei 140 .
Man kann die Kondensation des p-Nitro- benzolsulfonarnids mit a-n-Propoxy-propion- 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-ben- zolsulfonamids ausgehen und diese mit a-n- Propoxy-propionsäurechlorid umsetzen.
Fer ner kann man p-Nitro-benzolsulfonamid auch mit a-n-Propoxy-propionsäure in Gegenwart von Kondensationsmitteln, z. B. von Phosphor- pentoxyd oder von Phosphorpentachlorid, um setzen.
Zum gleichen Endprodukt gelangt man auch, wenn man eine Metallverbindung des a.-n-Propoxy-propionsäureamids mit einem p- Nitrobenzolsulfohalogenid umsetzt und den erhaltenen Nitrokörper reduziert.
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
wherein 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 allows the radical R to act in the compound obtained by reduction into the Amino group leads over.
The resulting new compound, the p-amino-benzenesulfone-Ni (a @ n-propoxy-propionyl) -amide, forms colorless crystals with a melting point of 140 ". It can be converted into salts with inorganic or organic bases. They should find therapeutic use.
Example: 30 parts of a-n-propoxypropionic 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 without further purification according to Bechamp.
The reduction mixture is then made solo alkaline, filtered off with suction and the n-amino-benzenesulfone-N1 - (a-p-propoxy-propionyl) -amide is precipitated from the filtrate with acetic acid. The compound can be obtained in pure form by recrystallization from alcohol; it then melts at 140.
The condensation of the p-nitrobenzenesulfonamide with a-n-propoxypropionic 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-propoxypropionic acid chloride.
Fer ner can p-nitro-benzenesulfonamide with a-n-propoxy-propionic acid in the presence of condensing agents, eg. B. of phosphorus pentoxide or phosphorus pentachloride to put.
The same end product is also obtained if a metal compound of a.-n-propoxy-propionic 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 | ||
CH264504T | 1943-11-05 | ||
CH242285T | 1943-11-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH264504A true CH264504A (en) | 1949-10-15 |
Family
ID=34139172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH264504D CH264504A (en) | 1940-06-21 | 1943-11-05 | Process for the preparation of an acylated p-amino-benzenesulfonamide. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH264504A (en) |
-
1943
- 1943-11-05 CH CH264504D patent/CH264504A/en unknown
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