CH259648A - Process for the preparation of a biguanide derivative. - Google Patents
Process for the preparation of a biguanide derivative.Info
- Publication number
- CH259648A CH259648A CH259648DA CH259648A CH 259648 A CH259648 A CH 259648A CH 259648D A CH259648D A CH 259648DA CH 259648 A CH259648 A CH 259648A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- methyl
- biguanide derivative
- melts
- 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)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Description
Verfahren zur Herstellung eines Biguanidderivates. Die vorliegende Erfindung betrifft ein. Verfahren zur lIerstelhing von N'-p-Chlor- hlienyl-N'-inetliyl-N'-isopropylbiguanid, wel.- ehes ein wertvolles chemotherapeutisches Mit tel ist oder als Zwischenprodukt für die Ver stellung von chemotherapeutischen Mitteln verwendet werden kann. Es ist insbesondere ein wertvolles Antimalariamittel.
Erfindungsgemäss wird die besagte neue Verbindung, nämlich N'-p-Chlorplienyl-N'- methyl-N'-isopropylbiguanid, dadurch erhal ten, dass man N3-11Tethyl-N@>-isopropyldicyan- diainid mit p-Chloranilin umsetzt.
Die Umsetzung erfolgt zweckmässig durch Erhitzen eines Salzes des Amins mit dein substituierten Dic,v andiamid in Gegenwart eines Lösungsmittels, wie z. B. Wasser oder i,'-,1thoxyäthanol.
Das N'-p-Chlorphenyl.-N'-methyl-N'-iso- propylbiguanid stellt eine starke Base dar, welche mit organischen und anorganischen Säuren beständige Salze ergibt, die in man- ehen Fällen in Wasser leicht 4slieh sind. Die Salze lassen 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 organischen Lösungsmittel, wie z. B.
Aceton, oder in einem Alkohol, in welchem die Salze spärlich löslich sind, hergestellt werden. Auf diese Weise kann nian beispielsweise die Salze finit Essigsäure, Milchsäure, Methansulfon- säure, Metii3#lendisalicy lsäure, Methylen-bis- ss-oxynaphthoesäure und Salzsäure bequem herstellen.
Das folgende Beispiel diene zur Erläute rung der Erfindung.
<I>Beispiel:</I> Ein Gemisch von 14,0 Teilen N;-Methyl-N-- isopropyldicyandiamid und 18 Teilen p-Chlor- a.nilin-chlorhydrat in 150 Teilen Wasser wird während 3 Stunden unter Rückfluh zum Sie den erhitzt. Hierauf lässt man das Gemisch abkühlen, worauf abfiltriert wird. Der feste Rückstand wird mit kaltem Äthylacetat ge waschen und aus Wasser umkristallisiert.
Auf diese Weise erhält man N'-p-Chlor- phenyl-N'-methyl-N'-isopropylbiguanid in Form seines Monohydroehlorids, welches bei 245-246 C schmilzt. Die freie Base schmilzt bei 174-175 C, ihr Acetat bei 212" C.
Process for the preparation of a biguanide derivative. The present invention relates to a. Process for the production of N'-p-chlorohlienyl-N'-ethyl-N'-isopropylbiguanide, wel.- before a valuable chemotherapeutic agent is or can be used as an intermediate for the adjustment of chemotherapeutic agents. It is a particularly valuable antimalarial drug.
According to the invention, said new compound, namely N'-p-chloroplienyl-N'-methyl-N'-isopropylbiguanide, is obtained by reacting N3-11Tethyl-N @> - isopropyldicyandiainide with p-chloroaniline.
The reaction is conveniently carried out by heating a salt of the amine with your substituted dic, v andiamide in the presence of a solvent, such as. B. water or i, '-, 1thoxyethanol.
N'-p-chlorophenyl.-N'-methyl-N'-isopropyl biguanide is a strong base which, with organic and inorganic acids, gives stable salts which in some cases are easily dissolvable in water. The salts can be prepared in that the base is dissolved in aqueous solutions of the acid and then the water is evaporated, but they can be more conveniently in dry form by mixing the components in an organic solvent, such as. B.
Acetone, or in an alcohol in which the salts are sparingly soluble. In this way, for example, the finite salts acetic acid, lactic acid, methanesulfonic acid, metal disalicylic acid, methylene-bis-s-oxynaphthoic acid and hydrochloric acid can be conveniently prepared.
The following example serves to explain the invention.
<I> Example: </I> A mixture of 14.0 parts of N; -methyl-N- isopropyldicyandiamide and 18 parts of p-chloro-a.niline chlorohydrate in 150 parts of water is refluxed for 3 hours heated. The mixture is then allowed to cool and it is filtered off. The solid residue is washed with cold ethyl acetate and recrystallized from water.
In this way, N'-p-chlorophenyl-N'-methyl-N'-isopropyl biguanide is obtained in the form of its monohydrochloride, which melts at 245-246 ° C. The free base melts at 174-175 C, its acetate at 212 "C.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB259648X | 1945-10-08 | ||
GB170946X | 1946-09-17 | ||
CH254800T | 1946-10-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH259648A true CH259648A (en) | 1949-01-31 |
Family
ID=27178004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH259648D CH259648A (en) | 1945-10-08 | 1946-10-08 | Process for the preparation of a biguanide derivative. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH259648A (en) |
-
1946
- 1946-10-08 CH CH259648D patent/CH259648A/en unknown
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