CH312041A - Process for preparing a succinimide. - Google Patents

Process for preparing a succinimide.

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Publication number
CH312041A
CH312041A CH312041DA CH312041A CH 312041 A CH312041 A CH 312041A CH 312041D A CH312041D A CH 312041DA CH 312041 A CH312041 A CH 312041A
Authority
CH
Switzerland
Prior art keywords
propylamine
succinimide
preparing
acid
anhydride
Prior art date
Application number
Other languages
French (fr)
Inventor
Company Parke Davis
Original Assignee
Parke Davis & Co
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 Parke Davis & Co filed Critical Parke Davis & Co
Publication of CH312041A publication Critical patent/CH312041A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D207/00Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D207/02Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/30Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members
    • C07D207/34Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D207/36Oxygen or sulfur atoms
    • C07D207/402,5-Pyrrolidine-diones

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyrrole Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

  

  Procédé de     préparation    d'une     succinimide.       L'invention se rapporte à un procédé de  préparation d'une     suceinimide    possédant. une       activité        chimiothérapeutique,    la     \-propyl-          a.fl-diméthy1succinimide,    de formule  
EMI0001.0008     
    Selon l'invention, cette     smecinimide    est pré  parée en faisant réagir de l'acide     a,,6-diméthyl-          succinique    ou de     l'anhydride        a,

  fl-diméthyl-          succinique    avec au moins un     équivalent    chi  mique de     n-propylamine    et en chauffant le  produit intermédiaire ainsi formé à une tem  pérature comprise entre 100 et 350  C.  



  Pour l'exécution de la première partie du  procédé, il est avantageux, quoique non essen  tiel, d'employer un solvant inerte tel que l'eau,  un alcool aliphatique inférieur ou un     mélange     de tels alcools, l'éther, le benzène, le toluène  ou semblables, pour faciliter la réaction de  l'acide ou de l'anhydride.

   avec la     n-propylamine.     Il est indiqué d'employer plusieurs     équivalents     de     n-propylamine    par équivalent d'acide ou d'an  hydride     a,fl-diméthylsucciniques.    Les produits  intermédiaires sont     différents    selon celle des  deux matières premières     siissindiquées    que l'on  a employée et     aussi    selon la quantité de     n-pro-          pylamine        utilisée.    Lorsqu'on emploie l'an  hydride     a,fl-diméthylsuccinique    avec un équi  valent de     n-propylamine,

      le produit intermé-         diaire    est la     semi-amide;    tandis que si deux ou       plus    de deux équivalents de     n-propylamine     sont. employés, le     produit        intermédiaire    est le  sel de     n-propylamine    de la     semi-amide    de  l'acide     a,f3-diméthylsuccinique.    Dans le cas où  l'on emploie l'acide     a,f-diméthylsuceinique     comme     matière    première,

   le produit intermé  diaire et le sel     mono--    ou     di-u        propylaminique     de l'acide     a,fl-diméthylsuccinique.    Ces     produits          intermédiaires    peuvent être convertis en la       s2iccinimide        désirée    en les chauffant à une  température comprise entre 100 et 350  C. La  température préférée     pour    cette conversion se  trouve dans la région de 190 à 210  C,     tempé-          ratiire    à laquelle la réaction est complète au  bout d'environ une heure.  



  Le produit obtenu par le procédé selon  l'invention est une nouvelle substance possé  dant de précieuses propriétés thérapeutiques,  et     est    particulièrement utile     pour    le traite  ment du type petit mal de l'épilepsie. Le     point     d'ébullition de la nouvelle     succinimide    est de       1l.9-120     sous 18,5 mm Hg.  



  L'invention     est    illustrée par les exemples  suivants       Exemple   <I>1:</I>  On ajoute     graduellement    10 g d'acide     ,a,@-          diméthylsüccinique    à 20 g de     n-propylamine     aqueuse et élimine ensuite l'eau et l'excès  d'amine par     distillation.    La température du  résidu est élevée et maintenue à 200  C jus  qu'à ce qu'il n'y ait     plats    de dégagement de       n-propylamine.    Le résidu est     dissous    dans de  l'éther sec, la solution est décolorée avec du      noir animal,

       puis    l'éther est éliminé par dis  tillation. On distille alors le résidu     dans    le  vide et l'on obtient la     N-propyl-a,fl-diméthyl-          suceinimide    désirée; P. E.119-120  C./18,3 mm.  Rendement: 60 0/0.  



       Exemple   <I>2:</I>  On ajoute petit à petit 10 g d'anhydride       a,P-diméthylsucciniqiie    à 10     g    de     n-propyl-          amine    dans de l'éthanol,     puis    élimine par dis  tillation l'alcool et l'excès d'amine. On chauffe  le     résidu    à 210  C jusqu'à ce     qu'il    n'y ait plus  dégagement de     n-propylamine,    on refroidit et       dissout    dans de l'éther sec.

   La solution dans  l'éther est décolorée avec du noir- animal et  l'éther est éliminé par     distillation.    Le résidu  est     distillé        dans    le vide et l'on obtient la       N-propyl-a,f-diméthylsuecinimide    .cherchée;       P.        E.        119-120         C/1.8,5        mm.        Rendement:        65        %,  



  Process for preparing a succinimide. The invention relates to a process for preparing a sucinimide having. a chemotherapeutic activity, \ -propyl- a.fl-dimethylsuccinimide, of the formula
EMI0001.0008
    According to the invention, this smecinimide is prepared by reacting a ,, 6-dimethyl-succinic acid or anhydride a,

  fl-dimethyl-succinic with at least one chemical equivalent of n-propylamine and heating the intermediate product thus formed to a temperature between 100 and 350 C.



  For carrying out the first part of the process, it is advantageous, although not essential, to use an inert solvent such as water, a lower aliphatic alcohol or a mixture of such alcohols, ether, benzene, toluene or the like, to facilitate the reaction of the acid or anhydride.

   with n-propylamine. It is advisable to use several equivalents of n-propylamine per equivalent of α, β-dimethyl succinic acid or anhydride. The intermediate products are different depending on which of the two raw materials indicated that one has used and also according to the quantity of n-propylamine used. When α, fl-dimethyl succinic anhydride is used with an equivalent of n-propylamine,

      the intermediate product is the semi-amide; while if two or more equivalents of n-propylamine are. employed, the intermediate is the n-propylamine salt of α, β-dimethylsuccinic acid half-amide. In the case where alpha, f-dimethylsuceinic acid is used as the starting material,

   the intermediate and the mono- or di-u-propylamine salt of α, fl-dimethylsuccinic acid. These intermediates can be converted to the desired s2iccinimide by heating them to a temperature between 100 and 350 C. The preferred temperature for this conversion is in the region of 190 to 210 C, at which temperature the reaction is complete at least. after about an hour.



  The product obtained by the process according to the invention is a new substance possessing valuable therapeutic properties, and is particularly useful for the treatment of the mild illness type of epilepsy. The boiling point of the new succinimide is 11.9-120 at 18.5 mm Hg.



  The invention is illustrated by the following examples Example <I> 1: </I> 10 g of α, @ - dimethylsüccinic acid is gradually added to 20 g of aqueous n-propylamine and then the water and the water are removed. excess amine by distillation. The temperature of the residue is raised and maintained at 200 ° C. until there is no release of n-propylamine. The residue is dissolved in dry ether, the solution is decolorized with animal charcoal,

       then the ether is removed by distillation. The residue is then distilled off in vacuo to give the desired N-propyl-α, fl-dimethylsuckinimide; P. E.119-120 C./18.3 mm. Yield: 60 0/0.



       Example <I> 2: </I> 10 g of α, P-dimethylsucciniqiie anhydride is gradually added to 10 g of n-propylamine in ethanol, then the alcohol and the alcohol are distilled off by distillation. excess amine. The residue is heated to 210 ° C. until no more evolution of n-propylamine, the mixture is cooled and dissolved in dry ether.

   The ether solution is decolorized with animal charcoal and the ether is removed by distillation. The residue is distilled off in vacuo and the desired N-propyl-α, f-dimethylsuecinimide is obtained; P. E. 119-120 C / 1.8.5 mm. Yield: 65%,

 

Claims (1)

REVENDICATION: Procédé de préparation de la N propyl-a,/1- diméthy1succinimide, caractérisé en ce que l'on fait réagir de l'acide %8-diméthylsuccinique ou de l'anhydride a,,,B-diméthylsuccinique avec au moins un équivalent chimique de n-propyl- amine et chauffe le produit intermédiaire ainsi formé à une température comprise entre 100 et 350 C. La succinimide ainsi obtenue possède un point d'ébullition de 119 à 120 C sous 18,5 mm Hg; elle sert en thérapeutique. CLAIM: Process for preparing N-propyl-a, / 1-dimethylsuccinimide, characterized in that one reacts% 8-dimethylsuccinic acid or a ,,, B-dimethylsuccinic anhydride with at least one chemical equivalent of n-propylamine and heats the intermediate product thus formed to a temperature of between 100 and 350 C. The succinimide thus obtained has a boiling point of 119 to 120 C at 18.5 mm Hg; it is used in therapy. SOUS-REVENDICATIONS 1. Procédé selon la. revendication, dans lequel le produit intermédiaire est. chauffé à 1.90-2101, C. 2. Procédé selon la revendication et la. sous-revendication 1, dans lequel on emploie un excès de n-propylamine. SUB-CLAIMS 1. Method according to. claim, wherein the intermediate is. heated to 1.90-2101, C. 2. A method according to claim and. sub-claim 1, wherein an excess of n-propylamine is employed.
CH312041D 1952-02-26 1953-02-07 Process for preparing a succinimide. CH312041A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US312041XA 1952-02-26 1952-02-26
CH306792T 1953-02-07

Publications (1)

Publication Number Publication Date
CH312041A true CH312041A (en) 1955-12-15

Family

ID=25735201

Family Applications (1)

Application Number Title Priority Date Filing Date
CH312041D CH312041A (en) 1952-02-26 1953-02-07 Process for preparing a succinimide.

Country Status (1)

Country Link
CH (1) CH312041A (en)

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