CH242487A - 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
CH242487A
CH242487A CH242487DA CH242487A CH 242487 A CH242487 A CH 242487A CH 242487D A CH242487D A CH 242487DA CH 242487 A CH242487 A CH 242487A
Authority
CH
Switzerland
Prior art keywords
methyl
preparation
benzenesulfonamido
amino
tetrahydroquinazoline
Prior art date
Application number
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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.)
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Publication date
Application filed by Ciba Geigy filed Critical Ciba Geigy
Publication of CH242487A publication Critical patent/CH242487A/en

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Description

  

  Verfahren zur Herstellung eines neuen     Benzolsulfonamidderivates.       Gegenstand des vorliegenden Patentes     ist     ein Verfahren zur Herstellung     eines    neuen       Benzalsulfonamidderivates,    das dadurch ge  kennzeichnet ist, dass man ein     2-Benzol-          sulfonamido    - 4 -     methyl    - 5,6,7,8 -     tetrahydro        -          chinazolin,

      das in     p-Stellung    einen durch       Hydrolysie        in    die     Aminogruppe    überführ  baren     Substituenten    aufweist, mit     einem          hydrolysierenden        Mittel    behandelt.  



  Das so erhaltene 2 - (p -     Amino    -     benzol-          sulfonamido)    -4 -     methyl-    5,6,7,8 -     tetrahydro-          chinazolin        ist    ein     kristallines    Pulver vom  F. 228 . Die neue Verbindung soll als Arznei  mittel sowie als Zwischenprodukt Verwen  dung finden.  



  Das     2-Benzolsulfonamido-4-methyl-5,6,7,8-          tetrahydrochina.zolin,    das in     p-Stellung    zur       Sulfonamidgruppe    einen durch Hydrolyse     in     die     Aminogruppe        überführbaren        Substituen-          ten    enthält,     kann    auf verschiedene Art und  Weise gewonnen werden.

   Besonders geeignet  ist die Umsetzung der entsprechenden reak  tionsfähigen     Benzolsulfonsäurederivate,    ins-    besondere der     Benzolsulfonsäurehalogenide,     mit     4-Methyl-5,6,7,8-tetrahydrochinazolin-          verbindungen,    die in     2-Stellung    eine Gruppe  enthalten, die mit dem     Benzolsulfonsäure-          derivat    ein     2-Benzolsulfonamido-4-methyl-          5,6,7,8-tetrahydrochinazolin    zu bilden ver  mag, wie mit     2-Amino-4-methyl-5,6,7,

  8-          tetrahydrochinazolin.    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  2 - Halogen - 4 -     methyl-5,6,7,8-tetrahydrochin-          azolinen    umsetzen. Auch können andere dem  Fachmann geläufige     Herstellungsmethoden     benutzt werden.  



  <I>Beispiel 1:</I>  36 g 2 - (p -     Acetylamino    -     benzolsulfon-          amido)    - 4 -     methyl    - 5,6,7,8 -     tetrahydrocbin        -          azolin,    das durch Kondensation von     p-Acetyl-          amino-benzolsulfochlorid    mit     2-Amino-4-          methyl-5,6,7,8-tetrahydrochinazolin    erhalten      wurde, werden mit     einer    Lösung von 12 g       Natriumhydrogyd    in<B>150</B> cm' Wasser zwei  Stundenunter     RüAflul3,    gekocht.

   Die     Lösung     wird gegebenenfalls unter Zusatz von Tier  kohle     filtriert    und mit konzentrierter Salz  säure neutralisiert. Dabei fällt das     2-(p-          Amino    -     benzolsulf        onamido)        -4-methyl-5,    6, 7, 8  tetrahydrochinazolin als     kristallines        Pulver     aus. Die     Verbindung    kann durch     Umkristal-          lisation    aus 65%iger Essigsäure gereinigt  werden. Schmelzpunkt 228 .  



  <I>Beispiel 2:</I>  39 g     2-(p-Carbäthogyamino-benzolsulfon-          amido)    - 4 -     methyl    - 5,6,7,8 -     tetrahydrochin        -          azolin,    das durch Kondensation von     p-Carb-          äthogyamino-benzolsulfochlorid    mit     2-Amino-          4-methyl-5,6,7,8-tetrahydrochinazolin    erhal  ten wurde,

   werden wie im Beispiel 1 mit  einer     wässrigen        Lösung    von 12 g     Natrium-          hydrogyd        in    150 cm' Wasser     unter    Kochen  verseift. Nach der Neutralisation mit Salz  säure     wird    das     gebildete        2-(p-Amino-benzol-          sulfonamido)    - 4 -     methyl    - 5,6,7,8 -     tetrahydro-          chinazolin    isoliert und gegebenenfalls durch  s     Umkristallisieren        gereinigt.    Schmelzpunkt  228 .

      Die Hydrolyse     kann    auch     mit    andern  alkalischen     Mitteln,        beispielsweise    Erdalkali  hydroayden, 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 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 benzalsulfonamide derivative, which is characterized in that a 2-benzene sulfonamido - 4 - methyl - 5,6,7,8 - tetrahydro - quinazoline,

      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 - benzenesulfonamido) -4 - methyl - 5,6,7,8 - tetrahydroquinazoline obtained in this way is a crystalline powder with a melting point of 228. The new compound is to be used as a medicinal product and as an intermediate product.



  The 2-benzenesulfonamido-4-methyl-5,6,7,8-tetrahydroquina.zoline, 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 benzenesulfonic acid derivatives, in particular the benzenesulfonic acid halides, with 4-methyl-5,6,7,8-tetrahydroquinazoline compounds which contain a group in the 2-position which is associated with the benzenesulfonic acid derivative is particularly suitable 2-benzenesulfonamido-4-methyl-5,6,7,8-tetrahydroquinazoline is able to form, as with 2-amino-4-methyl-5,6,7,

  8-tetrahydroquinazoline. 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, react with 2 - halogen - 4 - methyl-5,6,7,8-tetrahydroquinazolines. Other production methods familiar to the person skilled in the art can also be used.



  <I> Example 1: </I> 36 g of 2 - (p - acetylamino - benzenesulfonamido) - 4 - methyl - 5,6,7,8 - tetrahydrocbin - azoline, which is produced by condensation of p-acetylamino- benzene sulfochloride was obtained with 2-amino-4-methyl-5,6,7,8-tetrahydroquinazoline, are boiled with a solution of 12 g of sodium hydrogen in <B> 150 </B> cm 'of water for two hours under RüAflul3.

   The solution is filtered with the addition of animal charcoal and neutralized with concentrated hydrochloric acid. The 2- (p-amino-benzenesulfonamido) -4-methyl-5, 6, 7, 8 tetrahydroquinazoline precipitates out as a crystalline powder. The compound can be purified by recrystallization from 65% acetic acid. Melting point 228.



  <I> Example 2: </I> 39 g of 2- (p-carbethogyamino-benzenesulfonamido) - 4 - methyl - 5,6,7,8 - tetrahydroquin - azoline, which is produced by condensation of p-carb - ethogyamino- benzenesulfochloride with 2-amino-4-methyl-5,6,7,8-tetrahydroquinazoline was obtained,

   are saponified as in Example 1 with an aqueous solution of 12 g of sodium hydroxide in 150 cm 'of water while boiling. After neutralization with hydrochloric acid, the 2- (p-amino-benzenesulfonamido) -4-methyl-5,6,7,8-tetrahydroquinazoline formed is isolated and, if necessary, purified by recrystallization. Melting point 228.

      The hydrolysis can also hydroayden with other alkaline agents, such as alkaline earth metal, such as calcium hydrogen, 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 Herstellung eines neuen Benzolsulfonamidderivates, dadurch gekenn zeichnet, dass man ein 2 Benzolsulfonamido- 4-methyl-5,6,7,8-tetrahydrochinazolin, das in p-Stellung einen durch Hydrolyse in, die Aminogruppe überführbaren Substituenten aufweist, PATENT CLAIM: Process for the preparation of a new benzenesulfonamide derivative, characterized in that a 2-benzenesulfonamido-4-methyl-5,6,7,8-tetrahydroquinazoline which has a substituent in the p-position which can be converted into the amino group by hydrolysis, mit einem hydrolysierenden Mittel behandelt. Das ' so erhaltene 2 - (p - Amino - benzol- sulf onamido) - 4 - methyl - 5, 6,7,8 - tetrahydro,- chinazolin ist ein kristallines Pulver vom F. 228 . Die neue Verbindung soll als Arznei mittel sowie als Zwischenprodukt Verwen dung finden. treated with a hydrolyzing agent. The 2 - (p - amino - benzenesulfonamido) - 4 - methyl - 5, 6,7,8 - tetrahydro - quinazoline obtained in this way is a crystalline powder with a melting point of 228. The new compound is to be used as a medicinal product and as an intermediate product.
CH242487D 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative. CH242487A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE242487X 1939-05-23
CH240221T 1945-12-15

Publications (1)

Publication Number Publication Date
CH242487A true CH242487A (en) 1946-05-15

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CH242487D CH242487A (en) 1939-05-23 1941-05-23 Process for the preparation of a new benzenesulfonamide derivative.

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CH (1) CH242487A (en)

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