CH240223A - Process for the preparation of a new benzenesulfonamide derivative. - Google Patents

Process for the preparation of a new benzenesulfonamide derivative.

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Publication number
CH240223A
CH240223A CH240223DA CH240223A CH 240223 A CH240223 A CH 240223A CH 240223D A CH240223D A CH 240223DA CH 240223 A CH240223 A CH 240223A
Authority
CH
Switzerland
Prior art keywords
sep
furodiazole
methyl
new
preparation
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 CH240223A publication Critical patent/CH240223A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D271/00Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms
    • C07D271/02Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms not condensed with other rings
    • C07D271/101,3,4-Oxadiazoles; Hydrogenated 1,3,4-oxadiazoles
    • C07D271/1131,3,4-Oxadiazoles; Hydrogenated 1,3,4-oxadiazoles with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Description

  

  Verfahren zur Herstellung eines neuen     Benzolsulfonamidderivates.       Gegenstand .des vorliegenden     Patentes    ist  ein Verfahren zur     Herstellung    eines neuen       Benzo,lsulfonamidderivates,    das dadurch ge  kennzeichnet ist, dass man ein     2-Benzolsulfon-          amido-    5 -     methyl    -1,3,4-     furodiazol,    das in       p-Stellung    einen durch Hydrolyse in die       Aminogruppe        überführbaren        Substituenten     aufweist, mit einem     hydrolysierenden    Mittel  behandelt.

    



  Das so erhaltene     2-(p-Amino-benzolsul-          fonamido)    - 5     -methyl-1,3"4-furodiazol    ist ein  kristallines Pulver. F. 171-172 . Die neue  Verbindung soll als Arzneimittel sowie als  Zwischenprodukt     Verwendung    finden.  



  Das     2-Benzolsulfonamido-5-methyl-1,3,4-          furodiazol,    das in     p-Stellung    zur Sulfonamid  gruppe einen durch Hydrolyse in die     Amino-          W   <B>0.</B>  



       uppe        überführbaren        Substituenten    enthält,  kann auf     verschiedene    Art und     Weise    ge  wonnen werden. Besonders     geeignet    ist die  Umsetzung der     entsprechenden    reaktions  fähigen     Benzolsulfonsäurederivate,        insbeson-          clere    der     Benzolsulfonsäurehalogenide    mit         5-Methyl-1,3,4-furodiazolverbindungen,    die in       2-Stellung    eine Gruppe     enthalten,

      die mit  dem     Benzolsulfonsäured-erivat    ein     2-Benzol-          sulfonamido-5-methyl-1,3,4-furodiazol    zu bil  den vermag, wie mit     2-Amino-5-methyl-1,3,4-          furodiazol.    Man kann auch entsprechende  Sulfonamide der Formel R .     S02:NHY,    in  der Y einen bei der nachfolgenden     Reaktion     sich abspaltenden Rest bedeutet, mit     2-Halo-          gen-5-methyl-1,3:,4-furodiazolen    umsetzen.  Auch können andere dem Fachmann geläu  fige Herstellungsmethoden benutzt werden.

         Beispiel   <I>1:</I>       29,6    g     2-(p-Acetylamino-benzolsulfon-          amido)-5,methyl-1,3,4-furodiazol,    das durch       Kondensation    von     p-Acetylaminobenzolsulfo-          chlorid    mit 2 -     Amino    - 5 -     methyl    -1, 3,4 -     furo-          diazol        erhalten    wurde, werden mit einer Lö  sung von 12 g     Natriumhydroxyd    in 150 am'  Wasser zwei Stunden unter     Rückfluss,    ge  kocht.

       Die.    Lösung wird,     gegebenenfalls    unter  Zusatz von     Tierkohle,    filtriert und mit     konz.         Salzsäure neutralisiert. Dabei fällt das     2-(p-          Amino-benzo-Isulfonamido)    - 5 -     methyl    -1,3,4  furodiazol als kristallines Pulver aus. Die       Verbindung    kann durch     Umkristallisation          aus    verdünntem Alkohol     bereini;t         -erden.     Schmelzpunkt     171-l72 .     



  <I>' Beispiel 2:</I>       32,6    g     2-(p-Carbäthoxyamino-benzolsul-          fonamido)    - 5 -     methy        1-1,3,4-furodiazol,    das  durch Kondensation von     p-Carbäthoxyamino-          benzolsulfochlorid    mit 2 -     Amino    - 5 -     metby    1  1,3,4-furodia.zol erhalten -wurde, -werden wie  im Beispiel 1 mit einer     wässerigen    Lösung  von 12 g     Natriumhydroxyd    in 150 am- Was  i --er unter Kochen verseift.

   Nach der Neutra  lisation mit Salzsäure wird das     gebildete     2 -     (p-Amino-benzolsulfonamido)    - 5 -     methy    1  1.3,4-furodiazol isoliert und gegebenenfalls  durch L     mkristallisieren    gereinigt. Schmelz  > Punkt 171-172 .  



  Die Hydrolyse kann auch mit andern  alkalischen Mitteln,     beispielsweise    Erdalkali-         hydroxyden,        wie        Calciumhydroxyd,    oder mit       sauren        Mitteln,    z. B. Salzsäure in Gegenwart       von@Vas#er        odr@r        organischen        Lösungsmitteln,     wie     Alkohol,        durchgeführt    werden.  



       Das    gebildete     p-Aniinobenzolsulfonamid-          derivat    lässt sieb ferner in Form seiner Salze,  z. B.     deNatriums    oder des     Caleiums,    iso  lieren.



  Process for the preparation of a new benzenesulfonamide derivative. The subject of the present patent is a process for the preparation of a new benzo, isulfonamide derivative, which is characterized in that a 2-benzenesulfonamido-5-methyl-1,3,4-furodiazole, which in the p-position has a Has hydrolysis in the amino group convertible substituents treated with a hydrolyzing agent.

    



  The 2- (p-amino-benzenesulfonamido) -5-methyl-1,3 "4-furodiazole obtained in this way is a crystalline powder. F. 171-172. The new compound is said to be used as a medicament and as an intermediate product.



  The 2-benzenesulfonamido-5-methyl-1,3,4-furodiazole, which in the p-position to the sulfonamide group is converted into the amino W <B> 0. </B> by hydrolysis



       Group contains convertible substituents can be obtained in various ways. The reaction of the corresponding reactive benzenesulfonic acid derivatives, in particular the benzenesulfonic acid halides, with 5-methyl-1,3,4-furodiazole compounds which contain a group in the 2-position is particularly suitable,

      which is able to form a 2-benzenesulfonamido-5-methyl-1,3,4-furodiazole with the benzenesulfonic acid derivative, as with 2-amino-5-methyl-1,3,4-furodiazole. Corresponding sulfonamides of the formula R can also be used. S02: NHY, in which Y denotes a radical which is split off in the subsequent reaction, with 2-halogen-5-methyl-1,3:, 4-furodiazoles. Other production methods familiar to the person skilled in the art can also be used.

         Example <I> 1: </I> 29.6 g of 2- (p-acetylamino-benzenesulfonamido) -5, methyl-1,3,4-furodiazole, which by condensation of p-acetylamino-benzenesulfonyl chloride with 2 - Amino - 5 - methyl -1, 3,4 - furodiazole was obtained with a solution of 12 g of sodium hydroxide in 150% of water under reflux for two hours.

       The. Solution is, if necessary with the addition of animal charcoal, filtered and treated with conc. Hydrochloric acid neutralized. The 2- (p-amino-benzo-isulfonamido) -5-methyl-1,3,4 furodiazole precipitates out as a crystalline powder. The compound can be purified by recrystallization from dilute alcohol. Melting point 171-172.



  <I> 'Example 2: </I> 32.6 g of 2- (p-carbethoxyamino-benzenesulphonamido) -5 - methy 1-1,3,4-furodiazole, which by condensation of p-carbethoxyamino-benzenesulphonyl chloride with 2 - Amino - 5 - metby 1 1,3,4-furodia.zol - was obtained, - are saponified with boiling as in Example 1 with an aqueous solution of 12 g of sodium hydroxide in 150 am-water.

   After neutralization with hydrochloric acid, the 2 - (p-amino-benzenesulfonamido) -5-methy 1 1,3,4-furodiazole formed is isolated and, if necessary, purified by crystallization. Melt> points 171-172.



  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, e.g. B. hydrochloric acid in the presence of @ Vas # er or @ r organic solvents such as alcohol.



       The p-aniinobenzenesulfonamide derivative formed can also be sieved in the form of its salts, e.g. B. deSodium or Caleium, isolate.

 

Claims (1)

EMI0002.0042 PATENTANSPRUCH: <tb> Verfahren <SEP> zur <SEP> Herstellung <SEP> eines <SEP> neuen <tb> l;enzolsulfoiiiniidderivates, <SEP> dadurch <SEP> Zekenn zeichnet, <SEP> dass <SEP> man <SEP> ein <SEP> 2-Benzolsulfonamido-5 rnethyl-1,3,4-fiirodiazol, <SEP> das <SEP> in <SEP> p-Stellung <SEP> ; <tb> einen <SEP> durch <SEP> Hydrolyse <SEP> in <SEP> die <SEP> Aminogruppe <tb> überführbanen <SEP> Substituenten <SEP> aufweist, <SEP> mit <tb> einem <SEP> bydrolysiercnden <SEP> -Mittel <SEP> behandelt. <tb> Das <SEP> so <SEP> erhaltene <SEP> 2-(p-Amino-benzolsul fonamiilo)-5-inctliyl-1.3.4-furodiazol <SEP> ist <SEP> ein <SEP> , <tb> l;ri#,tallines <SEP> Pulver. <SEP> F. <SEP> <B>171.-172'.</B> <SEP> Die <SEP> neue <tb> Verbindung <SEP> soll <SEP> als <SEP> Arzneimittel <SEP> sowie <SEP> als <tb> Zwischenprodukt <SEP> Verwendung <SEP> finden. EMI0002.0042 PATENT CLAIM: <tb> Procedure <SEP> for <SEP> production <SEP> of a <SEP> new one <tb> l; enzolsulfoiiiniidderivates, <SEP> characterized by <SEP> Zekenn, <SEP> that <SEP> one <SEP> a <SEP> 2-benzenesulfonamido-5-methyl-1,3,4-fiirodiazole, <SEP> the <SEP> in <SEP> p position <SEP>; <tb> a <SEP> through <SEP> hydrolysis <SEP> in <SEP> the <SEP> amino group <tb> transfer line <SEP> has substituents <SEP>, <SEP> with <tb> treated with a <SEP> bydrolysing <SEP> agent <SEP>. <tb> The <SEP> so <SEP> obtained <SEP> 2- (p-Amino-benzolsul fonamiilo) -5-inctliyl-1.3.4-furodiazole <SEP> is <SEP> a <SEP>, <tb> l; ri #, tallines <SEP> powder. <SEP> F. <SEP> <B> 171.-172 '. </B> <SEP> The <SEP> new <tb> Connection <SEP> should <SEP> as <SEP> drug <SEP> and <SEP> as <tb> Intermediate product <SEP> find use <SEP>.
CH240223D 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative. CH240223A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE240223X 1939-05-23

Publications (1)

Publication Number Publication Date
CH240223A true CH240223A (en) 1945-12-15

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CH240223D CH240223A (en) 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative.

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CH (1) CH240223A (en)

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