CH239156A - Process for the production of a new benzene sulfonamide derivative. - Google Patents

Process for the production of a new benzene sulfonamide derivative.

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Publication number
CH239156A
CH239156A CH239156DA CH239156A CH 239156 A CH239156 A CH 239156A CH 239156D A CH239156D A CH 239156DA CH 239156 A CH239156 A CH 239156A
Authority
CH
Switzerland
Prior art keywords
ethyl
pyrimidine
production
sulfonamide derivative
benzene sulfonamide
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH239156A publication Critical patent/CH239156A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D239/00Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/02Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
    • C07D239/24Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
    • C07D239/28Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more 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, directly attached to ring carbon atoms
    • C07D239/69Benzenesulfonamido-pyrimidines

Description

  

  Verfahren zur Herstellung eines neuen     Benzol-sulfonamidderivates.            Gegenstand    des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines neuen       Benzolsulf        onamidderivates,    das dadurch ge  kennzeichnet ist, dass man ein     2-Benzolsul-          fonamido-5-äthyl-pyrimidin,    das in     p-Stel-          lung        einen    durch Hydrolyse in die     Amino-          gruppe        überführbaren        Substituenten    auf  weist,

   mit einem     hydrolysierenden        Mittel    be  handelt.  



  Das so erhaltene     2-(p-Amino-benzolsul-          fonamido    - 5 -     äthyl    -     pyrimidin        schmilzt    bei       214-215 .    Die neue     Verbindung    soll als       Arzneimittel    sowie als Zwischenprodukt       Verwendung        finden.     



  Das     2-Benzolsulfonamido-5-äthyl-pyrimi-          din,    das     in        p-Stellung    zur     Sulfonamidgruppe     einen durch Hydrolyse in die     Amiuogruppe          überführbaren        Substituenten    enthält, kann       auf    verschiedene Art und Weise gewonnen  werden.

   Besonders geeignet ist die Um  setzung der entsprechenden reaktionsfähigen       Benzolsulfonsäurederivate,    insbesondere der       Benzolsulfonsäurehalogenide,    mit 5-Äthyl-         pyrimidinverbindungen,    die in     2-Stellung     eine Gruppe enthalten, welche     mit    dem     Ben-          zolsulfonsäurederivat    ein     2-Benzolsulfon-          amido-5-äthyl-pyrimidin    zu bilden vermag,

         wie    mit     2-Amino-5-äthyl-pyrimidin.    Man  kann auch     entsprechende        Sulfonamide    der  Formel     RSO,zNHY,        in    der Y     einen    bei der  nachfolgenden Reaktion sich abspaltenden  Rest bedeutet, mit     2-Halogen-5-äthyl-pyri-          midinen    umsetzen. Auch können andere, dem       Fachmann    geläufige Herstellungsmethoden  benützt     werden.     



  <I>Beispiel 1:</I>  26,4 g     p-Carbäthogyamino-benzolsulfo-          chlorid    werden mit 12,3 g     2-Amino-5-äthyl-          pyrimidin    (F. 143 ; hergestellt über das       Monoäthylmalonylguanidin    aus Monoäthyl  malonester und     Guanidin,    Überführung in  die     Dichlorverbindung    vom F. 193      mittels          Phosphorogychlorid    und Behandlung der  selben mit     Zinkstaub    in kochendem Wasser)  und 30 cm'     Pyridin        eine        Stunde    auf dem      Wasserbade erhitzt.

   Die kristalline Masse       wird    mit Wasser durchgerührt und abge  saugt. Die     Carbäthoxyverbindung    schmilzt  bei 244  (aus verdünntem Alkohol). Zur     Ver-          seifung    der     Carbäthoxygruppe    wird mit     2n-          Natronlauge    1     Stunde    auf 80-90  erwärmt,  die filtrierte Lösung mit Essigsäure ange  säuert und das     2-(p-Amino-benzolsulfon-          amido)-5-äthyl-pyrimidin    aus Alkohol     um-          kristallisiert,    F. 214-215 .

   Die     Ausbeute     beträgt<B>80%</B> der Theorie.  



  Das.gebildete     p-Aminobenzolsulfonamid-          derivat    lässt sich auch in Form seiner Salze,  z. B. des     Natriums    oder des     Calciums,     isolieren.  



  <I>Beispiel 2:</I>  123 g     2-Amino-5-äthyl-pyrimidin    wer  den in 250     cm3    trockenem     Pyridin    mit  240 g     p-Acetylamino-benzolsulfochloxid    unter  Rühren versetzt, wobei die Temperatur nicht  über 55  steigen soll. Man erwärmt noch  2 Stunden auf 55  und versetzt mit Wasser.  Das     ausgeschiedene        2-(p-Acetylamino-benzol-          sulfonamido)-5-äthyl-pyrimidin    wird zur       Reinigung    in     2n-Sodalösung    von 60  gelöst,  filtriert und mit Salzsäure gefällt.  



  32 g 2 - (p -     Acetylamino    -     benzolsulfon        -          amido)-5-äthyl-pyrimidin    werden in 100     cm'            2,5n-Natronlauge    gelöst und 1 Stunde am       Rückfluss    erwärmt.

   Durch     Neutralisieren        mit     Säure erhält man das     2-(p-Amino-benzol-          sulfonamido)    - 5 -     äthyl    -     pyrimidin.    Es wird  durch Lösen in Alkali und Fällen     mit    Säure  und durch     Umkristallisieren    aus verdünntem  Alkohol gereinigt. F. 214-215 .  



  Die Hydrolyse kann man auch mit an  dern alkalischen Mitteln, beispielsweise     Erd-          alkalihydroxyden,    wie     Calciumhydroxyd,     oder mit sauren Mitteln, z. B. Salzsäure, in  Gegenwart von Wasser oder organischen Lö  sungsmitteln, wie Alkohol, durchführen.



  Process for the production of a new benzene sulfonamide derivative. The present patent relates to a process for the preparation of a new benzenesulfonamide derivative, which is characterized in that a 2-benzenesulfonamido-5-ethyl-pyrimidine is converted into the amino group in the p-position by hydrolysis has convertible substituents,

   with a hydrolyzing agent.



  The 2- (p-amino-benzenesulfonamido-5-ethyl-pyrimidine obtained in this way melts at 214-215. The new compound is said to be used as a medicament and as an intermediate product.



  The 2-benzenesulfonamido-5-ethyl-pyrimidine, which contains a substituent which can be converted into the amino group by hydrolysis in the p-position to the sulfonamide group, can be obtained in various ways.

   The implementation of the corresponding reactive benzenesulfonic acid derivatives, in particular the benzenesulfonic acid halides, with 5-ethyl-pyrimidine compounds which contain a group in the 2-position which, with the benzenesulfonic acid derivative, gives a 2-benzenesulfonamido-5-ethyl-pyrimidine, is particularly suitable able to form

         as with 2-amino-5-ethyl-pyrimidine. Corresponding sulfonamides of the formula RSO, zNHY, in which Y denotes a radical which is split off in the subsequent reaction, can also be reacted with 2-halo-5-ethyl-pyrimidines. Other production methods familiar to the person skilled in the art can also be used.



  Example 1: 26.4 g of p-carbethogyamino-benzenesulfochloride are mixed with 12.3 g of 2-amino-5-ethylpyrimidine (F. 143; prepared from monoethylmalonylguanidine from monoethyl malonate and guanidine Conversion into the dichloro compound from F. 193 by means of phosphorogychloride and treatment of the same with zinc dust in boiling water) and 30 cm of pyridine heated on the water bath for one hour.

   The crystalline mass is stirred with water and filtered off with suction. The carbethoxy compound melts at 244 (from dilute alcohol). To saponify the carbethoxy group, it is heated to 80-90 for 1 hour with 2N sodium hydroxide solution, the filtered solution is acidified with acetic acid and the 2- (p-aminobenzenesulfonamido) -5-ethyl-pyrimidine is recrystallized from alcohol , F. 214-215.

   The yield is <B> 80% </B> of theory.



  The p-aminobenzene sulfonamide derivative formed can also be used in the form of its salts, e.g. B. of sodium or calcium isolate.



  <I> Example 2: </I> 123 g of 2-amino-5-ethyl-pyrimidine are added to 250 cm3 of dry pyridine with 240 g of p-acetylamino-benzenesulfochloxide with stirring, the temperature not exceeding 55. The mixture is heated to 55 for a further 2 hours and treated with water. The precipitated 2- (p-acetylamino-benzenesulfonamido) -5-ethyl-pyrimidine is dissolved in 2N soda solution of 60 for purification, filtered and precipitated with hydrochloric acid.



  32 g of 2 - (p - acetylamino - benzenesulfone - amido) -5-ethyl-pyrimidine are dissolved in 100 cm '2.5N sodium hydroxide solution and refluxed for 1 hour.

   Neutralizing with acid gives 2- (p-amino-benzenesulfonamido) -5-ethyl-pyrimidine. It is purified by dissolving in alkali and precipitating with acid and by recrystallization from dilute alcohol. F. 214-215.



  The hydrolysis can also be carried out with other alkaline agents, for example alkaline earth metal hydroxides such as calcium hydroxide, or with acidic agents such. B. hydrochloric acid, in the presence of water or organic solvents such as alcohol, perform.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Benzolsulfonamidderivates, dadurch gekenn zeichnet, dass man ein 2-Benzolsulfonamido- 5-äthyl-pyrimidin, das in p-Stellung einen durch Hydrolyse in die Aminogruppe über führbaren Substituenten aufweist, mit einem hydrolisierenden Mittel behandelt. Das so erhaltene 2-(p-Amino-benzolsul- fonamido - 5 - äthyl - pyrimidin schmilzt bei 214-215 . PATENT CLAIM: Process for the preparation of a new benzenesulfonamide derivative, characterized in that a 2-benzenesulfonamido-5-ethyl-pyrimidine, which has a substituent which can be converted into the amino group by hydrolysis, is treated with a hydrolyzing agent. The 2- (p-amino-benzenesulphonamido - 5 - ethyl - pyrimidine obtained in this way melts at 214-215. Die neue Verbindung soll als Arzneimittel sowie als Zwischenprodukt Verwendung finden. The new compound is to be used as a drug and as an intermediate product.
CH239156D 1939-11-23 1940-11-22 Process for the production of a new benzene sulfonamide derivative. CH239156A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE239153X 1939-11-23
DE239156X 1939-11-23

Publications (1)

Publication Number Publication Date
CH239156A true CH239156A (en) 1945-09-15

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CH239156D CH239156A (en) 1939-11-23 1940-11-22 Process for the production of a new benzene sulfonamide derivative.

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