CH259673A - Process for the preparation of a biguanide derivative. - Google Patents
Process for the preparation of a biguanide derivative.Info
- Publication number
- CH259673A CH259673A CH259673DA CH259673A CH 259673 A CH259673 A CH 259673A CH 259673D A CH259673D A CH 259673DA CH 259673 A CH259673 A CH 259673A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- propylbiguanide
- bromophenyl
- biguanide derivative
- water
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C279/00—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
- C07C279/20—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups containing any of the groups, X being a hetero atom, Y being any atom, e.g. acylguanidines
- C07C279/24—Y being a hetero atom
- C07C279/26—X and Y being nitrogen atoms, i.e. biguanides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Biguanidderivates. Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von N'-p-Brom- pheriyl-N'-n-propylbiguanid, welches ein wertvolles chemotherapeutisches Mittel ist oder als Zwischenprodukt für die Herstel lung von chemotherapeutischen Mitteln ver wendet werden kann. Es ist insbesondere ein wertvolles Antimalariamittel.
Erfindungsgemäss wird die besagte neue Verbindung, nämlich N'-p-Bromphenyl-Ns- ri-propylbiguanid, dadurch erhalten, dass man N"-n-Propyldicyandiamid mit p-Bromanilin umsetzt.
Die Umsetzung erfolgt zweckmässig durch Erhitzen eines Salzes des Amins mit dem substiluierten Dicyandiamid in Gegenwart eines Lösungsmittels, wie z. B. Wasser oder f-Äthoxyäthanol.
Dass N'-p-Bromphenyl-N'-n-propylbigua- nid stellt eine starke Base dar, welche mit organischen und anorganischen Säuren be ständige Salze ergibt., die in manchen Fällen in Wasser leicht 'löslich sind. Die Salze las sen sich dadurch herstellen, dass die Base in wässrigen. Lösungen der Säure gelöst und hierauf das Wasser verdampft wird, doch können sie in trockener Form bequemer durch Vermischen der Komponenten in einem orga nischen Lösungsmittel, wie z. B. Aceton, oder in einem Alkohol, in welchem die Salze spär lich 'läslich sind, hergestellt werden.
Auf diese Weise kann man beispielsweise die Salze mit Essigsäure, Milchsäure, Methan- sulfonsäure, Methylendisalicylsäure, Methy- len-bis-ss-oxynaphthoesäure und Salzsäure be quem herstellen.
Das folgende Beispiel diene zur Erläu terung der Erfindung. Beispiel: Ein Gemisch von 12,6 Teilen N3-n-Pro- pyldicyandiamid und 23 Teilen p-Bromanilin- chlorhydrat in 350 Teilen Wasser wird wäh rend 3 Stunden unter Rückfluss zum Siedeir erhitzt. Hierauf lässt man das Gemisch ab kühlen, worauf abfiltriert wird. Der feste Rückstand wird mit kaltem Wasser gewa schen und aus Wasser umkristallisiert.
Auf diese Weise erhält man N'-p-Bromphenyl- N'-n-propylbiguanid in Form seines Mono- hydrochlorids, welches bei 221 bis 222 C schmilzt.
Process for the preparation of a biguanide derivative. The present invention relates to a process for the preparation of N'-p-bromopheriyl-N'-n-propylbiguanide, which is a valuable chemotherapeutic agent or can be used as an intermediate for the preparation of chemotherapeutic agents. It is a particularly valuable antimalarial drug.
According to the invention, said new compound, namely N'-p-bromophenyl-Ns- ri-propylbiguanide, is obtained by reacting N "-n-propyldicyandiamide with p-bromoaniline.
The reaction is conveniently carried out by heating a salt of the amine with the substituted dicyandiamide in the presence of a solvent, such as. B. water or f-ethoxyethanol.
The N'-p-bromophenyl-N'-n-propylbiguanide is a strong base which, with organic and inorganic acids, results in stable salts, which in some cases are easily soluble in water. The salts can be prepared in that the base in aqueous. Solutions of the acid dissolved and then the water is evaporated, but they can be more convenient in dry form by mixing the components in an orga African solvent, such as. B. acetone, or in an alcohol in which the salts are spär Lich 'soluble, are produced.
In this way, for example, the salts with acetic acid, lactic acid, methanesulfonic acid, methylenedisalicylic acid, methylene-bis-β-oxynaphthoic acid and hydrochloric acid can be easily prepared.
The following example serves to explain the invention. Example: A mixture of 12.6 parts of N3-n-propyldicyandiamide and 23 parts of p-bromoaniline chlorohydrate in 350 parts of water is heated to the boil under reflux for 3 hours. The mixture is then allowed to cool, whereupon it is filtered off. The solid residue is washed with cold water and recrystallized from water.
In this way, N'-p-bromophenyl-N'-n-propyl biguanide is obtained in the form of its monohydrochloride, which melts at 221 to 222.degree.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB259673X | 1945-10-08 | ||
GB170946X | 1946-09-17 | ||
CH254800T | 1946-10-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH259673A true CH259673A (en) | 1949-01-31 |
Family
ID=27178029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH259673D CH259673A (en) | 1945-10-08 | 1946-10-08 | Process for the preparation of a biguanide derivative. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH259673A (en) |
-
1946
- 1946-10-08 CH CH259673D patent/CH259673A/en unknown
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