CH242492A - 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
CH242492A
CH242492A CH242492DA CH242492A CH 242492 A CH242492 A CH 242492A CH 242492D A CH242492D A CH 242492DA CH 242492 A CH242492 A CH 242492A
Authority
CH
Switzerland
Prior art keywords
pyridazine
new
preparation
benzenesulfonamide derivative
amino
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 CH242492A publication Critical patent/CH242492A/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
    • C07D237/02Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings not condensed with other rings
    • C07D237/06Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
    • C07D237/10Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings not condensed with other rings having three 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
    • C07D237/20Nitrogen atoms

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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     Benzolsulfonaxnidderivates:       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur     Herstellung        eines    neuen       Benzolsulfonamidderivates,    das dadurch ge  kennzeichnet ist, dass man ein     3-Benzol-          sulfonamido-pyridazin,    das in     p-Stellung     einen durch Hydrolyse     in    die     Aminogruppe          überführbaren        Substituenten    aufweist, mit  einem     hydrolysierenden    Mittel behandelt.  



  Das so erhaltene 3 - (p -     Amino    -     benzol-          sulfonamido)-pyridazin    ist ein     kristallines     Pulver vom F. 207 . Die neue     Verbindung     soll als Arzneimittel     sowie    als Zwischen  produkt     Verwendung    finden.  



  Das     3-Benzolsulfonamido-pyridazin,    das       in        p-Stelluig    zur     Sulfonamidgruppe    einen  durch Hydrolyse in die     Aminogruppe    über  führbaren     Substituenten    enthält, kann auf       verschiedene    Art     und    Weise     gewonnen    wer  den.

   Besonders geeignet ist die Umsetzung  der entsprechenden reaktionsfähigen Benzol  sulfonsäurederivate, insbesondere der     Benzöl-          sulfonsäurehalogenide,    mit     Pyridazinverbin-          dungen,    die in     3-Stellung    eine Gruppe enthal-         ten,        die,mit    dem     Benzolsulfonsäurederivat    ein       3_    -     Benzolsulfonamido    -     pyridazin    zu     bilden     vermag,

   wie mit     3-Amino-pyridazin.    Man  kann auch entsprechende Sulfonamide der       Vormel    R .     S02NHY,        in    der Y einen bei  nachfolgender Reaktion sich     abspaltenden     Rest bedeutet, mit     3-Halogen-pyridazinen          umsetzen.    Auch können andere dem Fach  mann geläufige     Herstellungsmethoden    be  nutzt werden.  



  <I>Beispiel 1:</I>  29,2 g     3-(p-Acetylamino-benzolsulfon-          amido)-pyridazin,    das durch Kondensation  von     p-Acetylamino-benzolsulfochlorid    mit  aus     3-Chlor-pyridazin    und Ammoniak ge  wonnenem     3-Amino-pyridazin    erhalten wurde,  werden mit     einer    Lösung von 12g     Natrium-          hydrogyd        in    150 cm' Wasser zwei Stunden  unter     Rückfluss    gekocht.

   Die Lösung wird  gegebenenfalls     unter    Zusatz von Tierkohle  filtriert und mit konzentrierter Salzsäure       neutralisiert.    Dabei fällt das     3-(p-Amino-          benzolsulfonamido)-pyridazin    als     kristallines         Pulver aus. Die     Verbindung    kann durch Um  kristallisation aus     verdünntem    Alkohol ge  reinigt werden. Schmelzpunkt 207 .  



       Beispiel   <I>2:</I>  82,2 g 3 - (p -     Cärbäthogyamino        -benzol-          sulfonamido)-pyridazin;    das durch Konden  sation von     p-Cärbäthögyamino-benzolsitlfö-          chloridmit        3-Amiuo-pyridazin        erhaltenwurde,     werden     wie    im Beispiel 1 mit einer     wässrigen     Lösung von 12 g     Natriumhydrogyd    in  150 cm' Wasser unter Kochen verseift.

   Nach  der Neutralisation     mit    Salzsäure wird das  gebildete 3 - (p     -Amino-        benzolsulfonamido)-          pyridazin        isoliert    und durch Umfällen     aus          verdünnter    Natronlauge gegebenenfalls durch       Umkristallisieren    gereinigt.     Schmelzpunkt     207 .  



  Die Hydrolyse     kann    auch mit andern  alkalischen Mitteln,     beispielsweise    Erdalkali  hydrogyden, wie     Calciumhydroxyd,    oder mit         sauren        Mitteln,    z. B. Salzsäure, in Gegenwart  von Wasser oder organischen     Lösungsmitteln,     wie Alkohol, durchgeführt werden.  



  Das gebildete     p-Amino-benzolsulfanamid-          derivat    lässt sich ferner in Form seiner Salze,  z. B. des Natriums oder des     Caleiums,     isolieren.



  Process for the production of a new benzenesulphonaxnide derivative: The subject of the present patent is a process for the production of a new benzenesulphonamide derivative, which is characterized in that a 3-benzenesulphonamido-pyridazine is used which has a substituent in the p-position which can be converted into the amino group by hydrolysis having treated with a hydrolyzing agent.



  The 3 - (p - amino - benzenesulfonamido) pyridazine obtained in this way is a crystalline powder with a melting point of 207. The new compound is to be used as a medicinal product and as an intermediate product.



  The 3-benzenesulfonamido-pyridazine, 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 reaction of the corresponding reactive benzene sulfonic acid derivatives, in particular the benzole sulfonic acid halides, with pyridazine compounds which contain a group in the 3-position which is able to form a 3-benzenesulfonamido-pyridazine with the benzenesulfonic acid derivative is particularly suitable,

   as with 3-amino-pyridazine. One can also use the corresponding sulfonamides of the prefix R. S02NHY, in which Y denotes a radical which is split off in the subsequent reaction, with 3-halopyridazines. Other manufacturing methods familiar to the expert can also be used.



  <I> Example 1: </I> 29.2 g of 3- (p-acetylamino-benzenesulfonamido) -pyridazine, which is obtained by condensation of p-acetylamino-benzenesulfonyl chloride with 3- (p-acetylamino-benzenesulfonyl chloride) obtained from 3-chloropyridazine and ammonia. Amino-pyridazine was obtained, are boiled under reflux for two hours with a solution of 12 g of sodium hydroxide in 150 cm 'of water.

   The solution is filtered with the addition of animal charcoal and neutralized with concentrated hydrochloric acid. The 3- (p-aminobenzenesulfonamido) pyridazine precipitates out as a crystalline powder. The compound can be purified by recrystallization from dilute alcohol. Melting point 207.



       Example <I> 2: </I> 82.2 g of 3 - (p - Carbethogyamino-benzene-sulfonamido) -pyridazine; which was obtained by condensation of p-Carbäthögyamino-benzolsitlfö- chloridmit 3-Amiuopyridazin are saponified as in Example 1 with an aqueous solution of 12 g of sodium hydrogen in 150 cm 'of water while boiling.

   After neutralization with hydrochloric acid, the 3 - (p -aminobenzenesulfonamido) pyridazine formed is isolated and purified by reprecipitation from dilute sodium hydroxide solution, if necessary by recrystallization. Melting point 207.



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



  The p-amino-benzenesulfanamide 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 3-Benzolsulfonamido- pyridazin, das in p-Stellung einen durch Hydrolyse in die Aminogruppe überführ- baren Substituenten aufweist, PATENT CLAIM: Process for the production of a new benzenesulfonamide derivative, characterized in that a 3-benzenesulfonamidopyridazine which has a substituent which can be converted into the amino group by hydrolysis in the p-position, mit einem hy- drolysierenden Mittel behandelt. Das so erhaltene 3 - (p - Amino - benzol- sulfonamido)-pyridazin ist ein kristallines Pulver vom F. 207 . Die neue Verbindung soll als Arzneimittel sowie als Zwischen produkt Verwendung finden. treated with a hydrolyzing agent. The 3 - (p - amino - benzenesulfonamido) pyridazine obtained in this way is a crystalline powder with a melting point of 207. The new compound is to be used as a medicinal product and as an intermediate product.
CH242492D 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative. CH242492A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE242492X 1939-05-23
CH240222T 1941-05-23

Publications (1)

Publication Number Publication Date
CH242492A true CH242492A (en) 1946-05-15

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Application Number Title Priority Date Filing Date
CH242492D CH242492A (en) 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative.

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CH (1) CH242492A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891953A (en) * 1956-07-09 1959-06-23 American Cyanamid Co 3-amino-6-substituted pyridazines and methods of preparing and utilizing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891953A (en) * 1956-07-09 1959-06-23 American Cyanamid Co 3-amino-6-substituted pyridazines and methods of preparing and utilizing same

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