CH259672A - Process for the preparation of a biguanide derivative. - Google Patents
Process for the preparation of a biguanide derivative.Info
- Publication number
- CH259672A CH259672A CH259672DA CH259672A CH 259672 A CH259672 A CH 259672A CH 259672D A CH259672D A CH 259672DA CH 259672 A CH259672 A CH 259672A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- bromophenyl
- biguanide derivative
- water
- acid
- 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- phenyl-N'-isopropylbiguanid, welches ein wertvolles chemotherapeutisches Mittel ist oder als Zwischenprodukt, für die Herstellung von chemotherapeutischen Mitteln verwendet werden, kann. Es ist insbesondere ein wert volles Antimalariamittel.
Erfindungsgemäss wird die besagte neue Verbindung, nämlich N'-p-Bromphenyl-N'- isopropylbiguanid, dadurch erhalten, dass man N3-Isopropyldicyandiamid mit p-Brom- anil'in umsetzt.
Die Umsetzung erfolgt. zweckmässig durch Erhitzen eines Salzes des Amins mit dem substituierten Dieyandiamid in Gegenwart eines Lösungsmittels, wie z. B. Wasser oder ss-Äthoxyäthanol.
Das N'-p-Bromphenyl-N''-isopropylbigua- 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 sieh 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, gder in einem Alkohol, in welchem die Salze spärlich löslich sind, hergestellt werden.
Auf diese Weise kann man beispielsweise die Salze mit Essigsäure, Milchsäure, Methan- sulfonsäure, Methylendisal'icylsäure, Methy- len-bis-fl-oxynaphthoesäure und Salzsäure be quem herstellen.
Das folgernde Beispiel diene zur Erläute rung der Erfindung.
<I>Beispiel:</I> Ein Gemisch von 12,6 Teilen N3-Isopro- pyldicyand,iamid und 27,9 Teilen p-Bromani- lin-chlorhydrat in 350 Teilen Wasser wird während 3 Stunden unter Rückfluss zum Sie den erhitzt. Hierauf lässt man das Gemisch abkühlen, worauf abfiltriert wird.
Der feste Rückstand wird mit kaltem Wasser gewa- achen und aus Wasser umkristallisiert. Auf diese Weise erhält man N'-p-B.romphenyl-N'\- isopropylbiguanid in Form seines Mono- hydrochlorids, welches bei 246 C schmilzt.
Process for the preparation of a biguanide derivative. The present invention relates to a process for the preparation of N'-p-bromophenyl-N'-isopropyl biguanide, 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-N'-isopropylbiguanide, is obtained by reacting N3-isopropyldicyandiamide with p-bromoanil'ine.
The implementation takes place. Conveniently by heating a salt of the amine with the substituted Dieyandiamid in the presence of a solvent, such as. B. water or ss-ethoxyethanol.
The N'-p-bromophenyl-N "- isopropylbiguanide is a strong base, which with. organic and inorganic acids result in permanent salts, which in some cases are easily soluble in water. The salts can be prepared by dissolving the base in aqueous solutions of the acid and then evaporating the water, but they can be more conveniently mixed in dry form. the components in an orga African solvent, such as. B. acetone, or in an alcohol in which the salts are sparingly soluble, can be prepared.
In this way, for example, the salts with acetic acid, lactic acid, methanesulfonic acid, methylenedisalicylic acid, methylene-bis-f-oxynaphthoic acid and hydrochloric acid can be easily prepared.
The following example serves to explain the invention.
<I> Example: </I> A mixture of 12.6 parts of N3-isopropyldicyand, iamide and 27.9 parts of p-bromaniline chlorohydrate in 350 parts of water is refluxed for 3 hours. The mixture is then allowed to cool and it is filtered off.
The solid residue is washed with cold water and recrystallized from water. In this way, N'-p-B.romphenyl-N '\ - isopropyl biguanide is obtained in the form of its monohydrochloride, which melts at 246 ° C.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB259672X | 1945-10-08 | ||
GB170946X | 1946-09-17 | ||
CH254800T | 1946-10-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH259672A true CH259672A (en) | 1949-01-31 |
Family
ID=27178028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH259672D CH259672A (en) | 1945-10-08 | 1946-10-08 | Process for the preparation of a biguanide derivative. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH259672A (en) |
-
1946
- 1946-10-08 CH CH259672D patent/CH259672A/en unknown
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