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
Application number
Other languages
German (de)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ici Ltd filed Critical Ici Ltd
Publication of CH259672A publication Critical patent/CH259672A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C279/00Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
    • C07C279/20Derivatives 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
    • C07C279/24Y being a hetero atom
    • C07C279/26X 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)

PATENTANSPRUCss: Verfahren, zur Herstellung von N'-p- Bromphenyl-N"-isopropylbiguanid, dadurch gekennzeichnet, dass man N3-Isopropyldicyan- diamid mit p-Bromanilin umsetzt. Das. N'-p Bromphenyl--N'-isopropylbigua- nid ist eine starke Base, deren Monohydro- chlorid bei 246 C schmilzt. Die neue Base besitzt kräftige Antimalariaeigenschaften. PATENT CLAIM: Process for the preparation of N'-p-bromophenyl-N "-isopropylbiguanide, characterized in that N3-isopropyldicyandiamide is reacted with p-bromoaniline. The N'-p-bromophenyl-N'-isopropylbiguanide is a strong base whose monohydrochloride melts at 246 C. The new base has powerful antimalarial properties.
CH259672D 1945-10-08 1946-10-08 Process for the preparation of a biguanide derivative. CH259672A (en)

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)

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