CH242490A - Process for the preparation of a new benzenesulfonamide derivative. - Google Patents

Process for the preparation of a new benzenesulfonamide derivative.

Info

Publication number
CH242490A
CH242490A CH242490DA CH242490A CH 242490 A CH242490 A CH 242490A CH 242490D A CH242490D A CH 242490DA CH 242490 A CH242490 A CH 242490A
Authority
CH
Switzerland
Prior art keywords
preparation
benzenesulfonamide derivative
new
benzenesulfonamido
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 CH242490A publication Critical patent/CH242490A/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

Description

  

  Verfahren zur Herstellung eines neuen     Benzolsulfonamidderivates.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung     eines    neuen       Benzolsulfonamidderivates,    das dadurch ge  kennzeichnet ist, dass man ein     1-Benzol-          sulfonamido-phtalazin,    das in     p-Stellung          einen    durch Hydrolyse     in.    die     Aminogruppe          überführbaren        Substituenten    aufweist,

   mit       einem        hydrolysierenden        11littel    behandelt.  



  Das so erhaltene 1- (p -     Amino    -     benzol-          sulfonamido)-phtalazin    ist ein kristallines  Pulver     vom,    F. 241 . Die neue     Verbindung     soll als Arzneimittel sowie als Zwischen  produkt Verwendung finden.  



  Das     1-Benzolsulfonamido-phtalaziu,        dass     in     p-Stellung    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     Benzol-          sulfonsäureha.logenide,    mit     Phtalazinen,    die  in     1-Stellung    eine Gruppe enthalten, die mit    dem     Benzolsulfonsäurederivat    ein     1-Benzol-          suMonamido=phtalazin    zu bilden vermag, wie  mit     1-Amino-phtalazin.    Man kann auch ent  sprechende Sulfonamide der Formel    R .     SO,NHY,       in der Y einen bei der nachfolgenden Reak  tion sich abspaltenden Rest bedeutet, mit       1-Halogen-phtalazinen    umsetzen.

   Auch kön  nen andere dem Fachmann geläufige Her  stellungsmethoden benutzt werden.  



  <I>Beispiel:</I>  36 g 1- (p -     Acetylamino    -     benzolsulf        on-          amido)-phtalazin,    F. 226 , das durch Kon  densation von     p-Acetylamino-benzolsiLlfo-          chlorid    mit     1-Amino-phtalazin    erhalten  wurde, werden mit einer Lösung von 12 g       Natriumhydrogyd    in 150 cm' Wasser zwei       Stunden        unter        Rückfluss    gekocht. Die Lösung  wird gegebenenfalls     unter    Zusatz von Tier  kohle filtriert und mit konzentrierter Salz  säure neutralisiert.

   Dabei fällt das 1-(p-           Amino-benzolsulfonamido)-phtalazin    als kri  stallines Pulver aus. Die     Verbindung    kann  durch     Umkristallisieren    aus 65%iger Essig  säure gereinigt werden.     Schmelzptmkt    241 .  



  Die Hydrolyse kann auch mit andern  alkalischen Mitteln, beispielsweise Erdalkali  hydrogyden, wie     Calciumhydrogyd,    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     sibh    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 benzenesulfonamide derivative, which is characterized in that a 1-benzenesulfonamido-phthalazine, which has a substituent which can be converted into the amino group by hydrolysis in the p-position,

   treated with a hydrolyzing agent.



  The 1- (p - amino - benzenesulfonamido) phtalazine obtained in this way is a crystalline powder of, F. 241. The new compound is to be used as a medicinal product and as an intermediate product.



  The 1-benzenesulfonamido-phtalaziu that 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 benzene sulfonic acid derivatives, in particular the benzene sulfonic acid alogenide, with phthalazines which contain a group in the 1-position which is able to form a 1-benzene-suMonamido = phtalazine with the benzenesulfonic acid derivative is particularly suitable, as with 1 -Amino-phtalazine. You can also ent speaking sulfonamides of the formula R. SO, NHY, in which Y denotes a radical which is split off in the subsequent reaction, with 1-halophthalazines.

   Other production methods familiar to those skilled in the art can also be used.



  <I> Example: </I> 36 g of 1- (p-acetylamino-benzenesulfonamido) -phthalazine, F. 226, which was obtained by condensation of p-acetylamino-benzenesulfonyl chloride with 1-aminophthalazine , are refluxed for two hours with a solution of 12 g of sodium hydrogen in 150 cm 'of water. The solution is filtered with the addition of animal charcoal and neutralized with concentrated hydrochloric acid.

   The 1- (p-amino-benzenesulfonamido) -phthalazine precipitates out as a crystalline powder. The compound can be purified by recrystallization from 65% acetic acid. Melting point 241.



  The hydrolysis can also be carried out with other alkaline agents, for example alkaline earth metals, such as calcium hydrogyd, 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 sibh 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 1-Benzolsulfonamido- phtalazin, das in p-Stellung einen durch Hydrolyse in die Aminogruppe überführ baren Substituenten aufweist, mit einem hydrolysierenden Mittel behandelt. PATENT CLAIM: Process for the production of a new benzenesulfonamide derivative, characterized in that a 1-benzenesulfonamido-phtalazine, which has a substituent which can be converted into the amino group by hydrolysis, is treated with a hydrolyzing agent. Das so erhaltene 1- (p - Amino - benzol- sulfonamido)-phtalazin ist ein kristallines Pulver vom F. 241 . Die neue Verbindung soll als Arzneimittel sowie als Zwischen produkt Verwendung finden. The 1- (p - amino - benzenesulfonamido) phtalazine obtained in this way is a crystalline powder of F. 241. The new compound is to be used as a medicinal product and as an intermediate product.
CH242490D 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative. CH242490A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE242490X 1939-05-23
CH240221T 1945-12-15

Publications (1)

Publication Number Publication Date
CH242490A true CH242490A (en) 1946-05-15

Family

ID=25728488

Family Applications (1)

Application Number Title Priority Date Filing Date
CH242490D CH242490A (en) 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative.

Country Status (1)

Country Link
CH (1) CH242490A (en)

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