CH242489A - 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
CH242489A
CH242489A CH242489DA CH242489A CH 242489 A CH242489 A CH 242489A CH 242489D A CH242489D A CH 242489DA CH 242489 A CH242489 A CH 242489A
Authority
CH
Switzerland
Prior art keywords
preparation
methyl
quinoxaline
benzenesulfonamide derivative
new
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 CH242489A publication Critical patent/CH242489A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D237/00Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings
    • C07D237/26Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings condensed with carbocyclic rings or ring systems
    • C07D237/30Phthalazines
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D241/00Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings
    • C07D241/36Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems
    • C07D241/38Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems with only hydrogen or carbon atoms directly attached to the ring nitrogen atoms
    • C07D241/40Benzopyrazines
    • C07D241/44Benzopyrazines 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 carbon atoms of the hetero ring

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

Description

  

  Verfahren zur Herstellung eines neuen     Benzolsulfonamidderivates.       Gegenstand des vorliegenden Patentes ist       ein    Verfahren zur Herstellung     eines    neuen       Benzolsulfonamidderivates,    das dadurch ge  kennzeichnet ist,     daB    man ein     2-Benzol-          sulf        onamido    - 3 -     methyl    -     chinoxalin,

      das in       p-Stellung    einen durch Hydrolyse in die     -          Aminogruppe        überführbaren        Substituenten     aufweist, mit     einem        hydrolysierenden    Mittel  behandelt.  



  Das so erhaltene 2 - (p -     Amino        -benzol-          sulf        ona#mido)    - 3 -     methyl    -     chinoxalin    ist ein  kristallines Pulver vom F. 204-205  (unter  Zersetzung). Die neue     Verbindung    soll als       Arzneimittel        und    als Zwischenprodukt Ver  wendung finden.  



  Das     2-Benzolsulfonamido-3-methyl-chin-          oxalin,    das in     p-Stellung    zur Sulfonamid  gruppe     einen    durch Hydrolyse     _    in die       Aminogruppe        überführbaren        Substituenten     enthält, kann auf verschiedene Art     und          Weise    gewonnen werden.

   Besonders geeignet  ist die Umsetzung der     entsprechenden    reak  tionsfähigen     Benzolsulfonsäurederivate,    ins-    besondere der     Benzolsulfonsäurehalogenide,     mit     3-Methyl-chinoxalinverbindungen,    die in       2-Stellung    eine Gruppe enthalten, die mit  dem     Benzolsulfonsäurederivat    ein     2-Benzol-          sulfonamido-3-methyl-chinoxalin    zu     bilden     vermag,

   wie mit 2     -Amino    - 3 -     methyl    -     ehin-          oxalin.    Man kann auch entsprechende Sulfon  amide der Formel     RSOZNHY,    in der Y  einen bei der nachfolgenden Reaktion sich  abspaltenden Rest bedeutet, mit     2-Halogen-          3-methyl-chinoxalinen    umsetzen. Auch kön  nen andere, dem Fachmann geläufige Her  stellungsmethoden benützt werden.    <I>Beispiel:</I>  159 Teile     2-Amino-3-methyl-chinoxalin     werden in 750 Teilen trockenem     Pyridin    auf  dem Wasserbad gelöst.

   Man kühlt auf zirka  20  ab     und    trägt unter weiterem Kühlen und  unter Rühren 265,5 Teile     p-Carbäthoxy-          amino-benzolsulfochlorid    langsam ein. Nach       beendetem    Eintragen erwärmt man 1 Stunde  auf dem kochenden Wasserbad und destilliert      das     überschüssige        Pyridin    im Vakuum auf  dem Wasserbade ab. Zum Rückstand gibt  man Wasser und dann Salzsäure bis zur  kongosauren Reaktion, wobei sich das gebil  dete 2 - (p -     Carbäthoxyamino    -     benzolsulfon-          amido)-3-methyl-chinoxalin    kristallisiert ab  scheidet.

   Man     nutscht    ab, wäscht mit Wasser  und kristallisiert aus verdünntem Alkohol  unter Zusatz von Tierkohle um. F. 238 bis  240 .  



  193 Teile     2-(p-Carbäthoxyamino-benzol-          sulfonamido)-3-methyl-chinoxalin    werden in  800 Teilen     2n-Natronlauge    1 Stunde lang auf  <B>95'</B> erwärmt. Man verrührt dann mit Tier  kohle, filtriert und fällt mit Salzsäure das  2 - (p     -Amino,-benzolsulfonamido)        -3-methyl-          chinoxalin    aus. Man     nutscht    ab, wäscht mit  Wasser und trocknet. F. 204-205  (unter       Zersetzung).    Man kann aus viel zirka  80%igem Alkohol     umkristallisieren.     



  Es     ist    möglich, die Hydrolyse auch mit  andern alkalischen Mitteln, beispielsweise         Erdalkalihydroxyden,        wie        Calciumhydroxyd,     oder mit sauren Mitteln, z. B. Salzsäure, in  Gegenwart von Wasser oder organischen Lö  sungsmitteln, wie Alkohol,     durchzuführen.     



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



  Process for the preparation of a new benzenesulfonamide derivative. The subject of the present patent is a process for the preparation of a new benzenesulfonamide derivative, which is characterized in that a 2-benzenesulfonamido - 3 - methyl - quinoxaline,

      which has a substituent which can be converted into the amino group by hydrolysis in the p-position, treated with a hydrolyzing agent.



  The 2 - (p-amino-benzene-sulfonate) -3-methyl-quinoxaline obtained in this way is a crystalline powder with a melting point of 204-205 (with decomposition). The new compound is to be used as a drug and as an intermediate product.



  The 2-benzenesulfonamido-3-methyl-quinoxaline, which in the p-position to the sulfonamide group contains a substituent which can be converted into the amino group by hydrolysis, can be obtained in various ways.

   The reaction of the corresponding reactive benzenesulfonic acid derivatives, in particular the benzenesulfonic acid halides, with 3-methyl-quinoxaline compounds which contain a group in the 2-position which with the benzenesulfonic acid derivative to form a 2-benzenesulfonamido-3-methylquinoxaline is particularly suitable able to form

   as with 2-amino-3-methyl-ehinoxaline. Corresponding sulfonamides of the formula RSOZNHY, in which Y is a radical which is split off in the subsequent reaction, can also be reacted with 2-halo-3-methylquinoxalines. Other production methods familiar to those skilled in the art can also be used. <I> Example: </I> 159 parts of 2-amino-3-methyl-quinoxaline are dissolved in 750 parts of dry pyridine on a water bath.

   The mixture is cooled to about 20 and, with further cooling and stirring, 265.5 parts of p-carbethoxyamino-benzenesulfonyl chloride are slowly introduced. When the addition is complete, the mixture is heated for 1 hour on the boiling water bath and the excess pyridine is distilled off in vacuo on the water bath. Water and then hydrochloric acid are added to the residue until the Congo acidic reaction occurs, whereby the formed 2- (p-carbethoxyamino-benzenesulfonamido) -3-methyl-quinoxaline separates out in crystallized form.

   It is filtered off with suction, washed with water and recrystallized from dilute alcohol with the addition of animal charcoal. F. 238 to 240.



  193 parts of 2- (p-carbethoxyamino-benzenesulfonamido) -3-methyl-quinoxaline are heated to 95 'in 800 parts of 2N sodium hydroxide solution for 1 hour. It is then stirred with animal charcoal, filtered and 2 - (p -amino, -benzenesulfonamido) -3-methylquinoxaline is precipitated with hydrochloric acid. One sucks off, washed with water and dried. F. 204-205 (with decomposition). You can recrystallize from a lot of about 80% alcohol.



  It is possible to carry out the hydrolysis 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 water or organic solvents such as alcohol, to perform.



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

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Benzolsulfonamidderivates, dadurch gekenn zeichnet, dass man ein 2-Benzolsulfonamido- 3-methyl-chinoxalin, das in p-Stellung einen durch Hydrolyse in die Aminogruppe über führbaren Substituenten aufweist, reit einem hydrolysierenden Mittel behandelt. PATENT CLAIM: A process for the preparation of a new benzenesulfonamide derivative, characterized in that a 2-benzenesulfonamido-3-methyl-quinoxaline, which has a substituent which can be converted into the amino group by hydrolysis, is treated with a hydrolyzing agent. Das so erhaltene 2 - (p - Amino - benzol- sulfonamido) - 3 -methyl - chinoxalin ist ein kristallines Pulver vom F. 204-205 (unter Zersetzung). Die neue Verbindung soll als Arzneimittel und als Zwischenprodukt Ver- wendunz finden. The 2 - (p - amino - benzene - sulfonamido) - 3 - methyl - quinoxaline obtained in this way is a crystalline powder with a melting point of 204-205 (with decomposition). The new compound is said to be used as a drug and as an intermediate product.
CH242489D 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative. CH242489A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE242489X 1939-05-23
CH240221T 1945-12-15

Publications (1)

Publication Number Publication Date
CH242489A true CH242489A (en) 1946-05-15

Family

ID=25728487

Family Applications (1)

Application Number Title Priority Date Filing Date
CH242489D CH242489A (en) 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative.

Country Status (1)

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CH (1) CH242489A (en)

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