CH242493A - Process for the preparation of a new benzenesulfonamide derivative. - Google Patents

Process for the preparation of a new benzenesulfonamide derivative.

Info

Publication number
CH242493A
CH242493A CH242493DA CH242493A CH 242493 A CH242493 A CH 242493A CH 242493D A CH242493D A CH 242493DA CH 242493 A CH242493 A CH 242493A
Authority
CH
Switzerland
Prior art keywords
pyridazine
methyl
preparation
amino
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 CH242493A publication Critical patent/CH242493A/en

Links

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

Landscapes

  • 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       Benzo@lsulfonamidderivates,    das dadurch ge  kennzeichnet ist, dass man ein     3-Benzol-          sulf        onamido    - 6 -     methyl    -     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)-6-methyl-pyridazin    ist ein kri  stallines Pulver vom F. 190-191 . Die neue       Verbindung    soll als     Arzneimittel    sowie als  Zwischenprodukt Verwendung finden:

    Das 3     -Benzolsulfonamido-    6     -methyl-pyr-          idazin,    das     in        p-Stellung        zur        Sul:fonamid-          gruppe    einen durch Hydrolyse in die     Amino-          gruppe        überführbaren        Substituenten    enthält,:  kann auf verschiedene Art und Weise     ge-          vonnen    werden.

   Besonders geeignet ist die  Umsetzung der entsprechenden reaktions  fähigen     Benzolsulfonsäurederivate,    insbeson  dere der     Benzolsulfonsäurehalogeniae,    mit    6 -     Methyl    -     pyridazinverbindungen,    die in       3-Stellung    eine Gruppe enthalten, die mit  dem     Benzolsulfonsäurederivat    ein     3-Benzol-          sulfonamido-6-methyl-pyridazin    zu bilden  vermag, wie mit     3-Amino-6-methyl-pyridazin.     Man     kann    auch     entsprechende    Sulfonamide  der Formel R .

       S 2NHY,        in    der Y     einen    bei  der nachfolgenden Reaktion sich abspalten  den Rest bedeutet,     mi        3-Halogen-6-methyl-          pyridazinen    umsetzen. Auch können andere  dem-Fachmann geläufige Herstellungsmetho  den benutzt werden.  



  <I>Beispiel 1:</I>  30,6 g     3-(p-Acetylamino-benzolsulfon-          a:mido)-6-methyl-pyridazin,    das durch Kon  densation von     p-Acetylamino-benzolsulfo-          Chlorid    mit aus     3-Chlor-6-methyl-pyridazin     und Ammoniak gewonnenem     3-Amino-6-          inethyl-pyridazin    erhalten wurde, werden mit       einer    Lösung von     12g        Natriumhydroxyd    in  150 cm' Wasser zwei     Stunden    unter Rück  fluss gekocht.

   Die     Lösung    wird gegeber < en-      falls unter Zusatz von Tierkohle filtriert und  mit konzentrierter Salzsäure     neutralisiert.     Dabei fällt das     3-(p-Amino-benzolsulion-          amido)-6-methyl-pyridäzin    als kristallines       Pulver    aus.

   Die     Verbindung    kann     durch     Umkristallisation     aus    verdünntem Alkohol       gereinigt    werden.     Schmelzpunkt        190-191 .       <I>Beispiel</I>     2.:          33;

  6    g     3-(p-Carbäthoxyamino-benzolsul-          fonamido)-6-methyl-pyridazin,    das     durchKon-          densation    von     -p-Carbäthoxyamino-benzol-          sulfochlorid    mit     3-Amino-6-methyl-pyridazin     erhalten wurde, werden wie im Beispiel 1 mit  einer     wässrigen    Lösung von 12 g Natrium  hydroxyd     in    150     cm3    Wasser unter Kochen  verseift.

   Nach der     Neutralisation    mit Salz  säure wird das gebildete     3-(p=Amino-benzol-          sulfonamicIo)-6-methyl-pyridazin    isoliert     und     gegebenenfalls     durch        Umkristallisieren    ge  reinigt.     Schmelzpunkt        190-191 .     



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



  Das gebildete     p-Amino-benzolsulfonamid-          derivat        lässt    sich ferner 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 Benzo @ Isulfonamidderivates, which is characterized in that a 3-benzene sulfonamido - 6 - methyl - pyridazine,

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



  The 3 - (p - amino - benzenesulfonamido) -6-methyl-pyridazine obtained in this way is a crystalline powder with a F. 190-191. The new compound is to be used as a medicinal product and as an intermediate product:

    The 3-benzenesulfonamido-6-methylpyridazine, which in the p-position to the sulfonamide group contains a substituent which can be converted into the amino group by hydrolysis, can be detected in various ways.

   The reaction of the corresponding reactive benzenesulfonic acid derivatives, in particular the benzenesulfonic acid halides, with 6-methyl-pyridazine compounds which contain a group in the 3-position which form a 3-benzenesulfonamido-6-methyl-pyridazine with the benzenesulfonic acid derivative is particularly suitable can, as with 3-amino-6-methyl-pyridazine. Corresponding sulfonamides of the formula R can also be used.

       S 2NHY, in which Y means the remainder split off in the subsequent reaction, react with 3-halo-6-methylpyridazines. Other manufacturing methods familiar to those skilled in the art can also be used.



  <I> Example 1: </I> 30.6 g of 3- (p-acetylamino-benzenesulfon- a: mido) -6-methyl-pyridazine, which is obtained by condensation of p-acetylamino-benzenesulfonyl chloride with 3- Chlor-6-methyl-pyridazine and ammonia obtained 3-amino-6-ynethyl-pyridazine are refluxed for two hours with a solution of 12 g of sodium hydroxide in 150 cm 'of water.

   If necessary, the solution is filtered with the addition of animal charcoal and neutralized with concentrated hydrochloric acid. The 3- (p-amino-benzenesulionamido) -6-methyl-pyridazine precipitates out as a crystalline powder.

   The compound can be purified by recrystallization from dilute alcohol. Mp 190-191. <I> Example </I> 2nd: 33;

  6 g of 3- (p-carbethoxyamino-benzenesulfonamido) -6-methyl-pyridazine, which was obtained by condensation of -p-carbethoxyamino-benzenesulfochloride with 3-amino-6-methyl-pyridazine, are as in the example 1 saponified with an aqueous solution of 12 g sodium hydroxide in 150 cm3 water while boiling.

   After neutralization with hydrochloric acid, the 3- (p = amino-benzenesulfonamicIo) -6-methyl-pyridazine formed is isolated and, if necessary, purified by recrystallization. Mp 190-191.



  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 water or organic solvents such as alcohol.



  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 Herstelhing eines neuen Benzolsulfonamidderivates, dadurch gekenn zeichnet, dass man ein 3-Benzolsulfonamido- 6-methyl-pyridazin, das in p-Stellung einen durch Hydrolyse in die Aminogruppe über führbaren Substituenten aufweist, mit,einem- hydrolysierenden Mittel behandelt. PATENT CLAIM: A process for the preparation of a new benzenesulfonamide derivative, characterized in that a 3-benzenesulfonamido-6-methyl-pyridazine, which has a substituent which can be converted into the amino group by hydrolysis, is treated with a hydrolyzing agent. Das so erhaltene 3 - (p - Amino - benzol- sulfonamido)-6-methyl-pyridazin ist ein kri stallines Pulver vom F. 190-191 . Die neue Verbindung soll als Arzneimittel sowie als Zwischenprodukt Verwendung finden. The 3 - (p - amino - benzenesulfonamido) -6-methyl-pyridazine obtained in this way is a crystalline powder with a F. 190-191. The new compound is to be used as a drug and as an intermediate product.
CH242493D 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative. CH242493A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE242493X 1939-05-23
CH240222T 1941-05-23

Publications (1)

Publication Number Publication Date
CH242493A true CH242493A (en) 1946-05-15

Family

ID=25728491

Family Applications (1)

Application Number Title Priority Date Filing Date
CH242493D CH242493A (en) 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative.

Country Status (1)

Country Link
CH (1) CH242493A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE951929C (en) * 1952-10-23 1956-11-08 Ciba Geigy Process for the preparation of 6- (p-Amino-benzenesulfonamido) -3-halopyridazines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE951929C (en) * 1952-10-23 1956-11-08 Ciba Geigy Process for the preparation of 6- (p-Amino-benzenesulfonamido) -3-halopyridazines

Similar Documents

Publication Publication Date Title
CH242493A (en) Process for the preparation of a new benzenesulfonamide derivative.
DE834989C (en) Process for the production of 21-iodine-pregnen- (5) -ol- (3) -one- (20)
CH242492A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH242487A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH240223A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH242491A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH242496A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH240224A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH242490A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH240221A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH239158A (en) Process for the production of a new benzene sulfonamide derivative.
CH240222A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH239147A (en) Process for the production of a new benzene sulfonamide derivative.
CH239150A (en) Process for the production of a new benzene sulfonamide derivative.
CH239148A (en) Process for the production of a new benzene sulfonamide derivative.
AT92407B (en) Process for the preparation of 1-allyl-3,7-dimethylxanthine.
CH250003A (en) Process for the preparation of a benzenesulfonamide derivative.
CH239683A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH239680A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH239153A (en) Process for the production of a new benzene sulfonamide derivative.
CH239146A (en) Process for the production of a new benzene sulfonamide derivative.
CH239154A (en) Process for the production of a new benzene sulfonamide derivative.
CH239149A (en) Process for the production of a new benzene sulfonamide derivative.
CH239684A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH239687A (en) Process for the preparation of a new benzenesulfonamide derivative.