CH244345A - Process for the preparation of a benzenesulfonamide derivative. - Google Patents

Process for the preparation of a benzenesulfonamide derivative.

Info

Publication number
CH244345A
CH244345A CH244345DA CH244345A CH 244345 A CH244345 A CH 244345A CH 244345D A CH244345D A CH 244345DA CH 244345 A CH244345 A CH 244345A
Authority
CH
Switzerland
Prior art keywords
tetrahydroquinazoline
preparation
benzenesulfonamide derivative
benzenesulfonamido
derivative
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 CH244345A publication Critical patent/CH244345A/en

Links

Landscapes

  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

  

  Verfahren zur Herstellung eines     Benzolsalfonamidderl-vates.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung des im Patent       Nr.    240221 beschriebenen     Benzolsulfonamid-          derivates,    das dadurch gekennzeichnet ist,       dass    man ein     2-Benzolsulfonamido-5,6,7,8-          tetrahydrochinazolin,    das in     p-Stellung    einen  durch Reduktion in die     Aminogruppe        über-          führba-ren        Substituenten        aufweiist,

      mit einem  reduzierenden Mittel behandelt.  



  Die so erhaltene Verbindung soll als Heil  mittel oder als Zwischenprodukt Verwendung  finden.  



  Das     2-Benzolsulionamido-5,6,7,8-tetra-          1-iydroel-linazol.in,    das in     p-Stellung    zur     Sul-          fonamidgruppe    einen durch Reduktion in die       Aminogrupp#e        überführbaren        Substituenten     enthält, kann auf verschiedene Art und Weise  gewonnen werden.

   Besonders:, geeignet ist die  Umsetzung der entsprechenden reaktionsfähi  gen     Benzolsulfonsäurederiyate,    insbesondere  der     Benzolsulfonsäurehalogenide,    mit     5,6,7,8,-          Tetrahydrochinazolin-Verbindungen,    die in       2-Stellung    eine Gruppe enthalten, die mit    dem     Benzolsulfonsäurederivat    ein     2-Benzol-          sulionamido-5,6,7,8-tetrahydrochinazolin    zu  bilden vermag, insbesondere mit     2-Amino-          5,6,7,8-tetrahydrochinazolin.    Man kann aber  auch entsprechende Sulfonamide der Formel       RSO,NHY,

     <B>ü </B> der Y einen bei der nachfol  genden Reaktion     ,dich    abspaltenden Rest be  deutet, mit     2-Ilalogen-5,6,7,8-tetrahydrochin-          azolinen    umsetzen, oder andere dem Fach  mann geläufige     Herstellungsm-ethoden    be  nutzen.  



  <I>Beispiel<B>1:</B></I>  33,4<B>g</B> 2<B>- (p -</B>     Nitro   <B>-</B>     benzolsulfonamiclo)-          5,6,7,8-tetrallydrochinazolin,    das durch Kon  densation von     p-Nitro-benzolsulioelilorid    mit       2-Amino-5,6,7,8,-tetrahydrochinazolin    erhal  ten wurde, -werden in der     äOfac'hen    Menge  absolutem Alkohol gelöst und mit<B>10</B> Ge  wichtsprozent eines     Nickel-Träger-Katalysa-          tors    im     Rührautoklaven    mit Wasserstoff  unter einem Überdruck von<B>5,

  0</B>     Atm-    bis zur  Beendigung der     Wasserstoffaufnalime    bei       100-120'    behandelt. Nach dem Erkalten  wird vom Katalysator     abfiltriert    und die      alkoholische Lösung eingedampft. Dabei fällt  das gebildete     2-(p-Amino-benzolsulfonamido)-          5,6   <B>.</B>     7,8-t#et#rahydrooliinazolin        kristallin        an.        Die     Verbindung kann     zür    Reinig     ung    aus Eisessig,  gegebenenfalls unter Zusatz von Tierkohle,  umkristallisiert werden.

   Schmelzpunkt<B>239'.</B>    <I>Beispiel</I>     2:       33,4<B>g</B>     2-(p-Nitro-benzolsulfonamido)-          5,6,7,8-tetrahydrochinazolin    werden mittels  <B>67,7 g</B>     Zinnehlorür        (Hydrat.)    und der doppel  ten Gewichtsmenge konzentrierter Salzsäure  reduziert. Das gebildete     2-(p-Amino-benzol-          sulfonamido)   <B>- 5,6,7,8 -</B>     tetrahydrochinazolin     wird isoliert und gegebenenfalls umkristalli  siert.

   Schmelzpunkt<B>239'.</B>    Das entstandene     p-Aminobenzolsulfon-          amidderivat        lässt        µich    auch in Form seiner  Salze, z. B.     des    Natriums oder     des    Kalziums,  isolieren.



  Process for the preparation of a benzenesalfonamide derivative. The present patent relates to a process for the preparation of the benzenesulfonamide derivative described in patent no. 240221, which is characterized in that a 2-benzenesulfonamido-5,6,7,8-tetrahydroquinazoline is obtained in the p-position by reduction has substituents that can be converted into the amino group,

      treated with a reducing agent.



  The compound obtained in this way is said to be used as a medicinal product or as an intermediate product.



  The 2-benzenesulionamido-5,6,7,8-tetra-1-iydroel-linazol.in, which in the p-position to the sulfonamide group contains a substituent which can be converted into the amino group by reduction, can be used in various ways be won.

   Particularly suitable is the reaction of the corresponding reactive benzenesulfonic acid derivatives, in particular the benzenesulfonic acid halides, with 5,6,7,8, - tetrahydroquinazoline compounds which contain a group in the 2-position which, with the benzenesulfonic acid derivative, is a 2-benzene sulionamido -5,6,7,8-tetrahydroquinazoline is able to form, especially with 2-amino-5,6,7,8-tetrahydroquinazoline. But you can also use corresponding sulfonamides of the formula RSO, NHY,

     The Y denotes a residue which is split off in the subsequent reaction with 2-ilalogen-5,6,7,8-tetrahydroquinazolines, or other production methods familiar to the person skilled in the art to use.



  <I> Example<B>1:</B> </I> 33.4 <B> g </B> 2 <B> - (p - </B> Nitro <B> - </B> benzolsulfonamiclo ) - 5,6,7,8-tetrallydroquinazoline, which was obtained by condensation of p-nitro-benzenesulioeliloride with 2-amino-5,6,7,8, -tetrahydroquinazoline, -are absolute in the ÄOfac'hen amount Dissolved alcohol and mixed with <B> 10 </B> weight percent of a nickel-supported catalyst in a stirred autoclave with hydrogen under an excess pressure of <B> 5,

  0 Atm- treated until hydrogen uptake ceases at 100-120 '. After cooling, the catalyst is filtered off and the alcoholic solution is evaporated. The 2- (p-amino-benzenesulfonamido) -5,6 formed is obtained in crystalline form. 7,8-t # et # rahydrooliinazoline. For cleaning, the compound can be recrystallized from glacial acetic acid, optionally with the addition of animal charcoal.

   Melting point <B> 239 '. </B> <I> Example </I> 2: 33.4 <B> g </B> 2- (p-nitro-benzenesulfonamido) - 5,6,7,8- Tetrahydroquinazoline is reduced using <B> 67.7 g </B> tin chloride (hydrate) and twice the amount by weight of concentrated hydrochloric acid. The 2- (p-amino-benzenesulfonamido) -5,6,7,8- tetrahydroquinazoline formed is isolated and, if necessary, recrystallized.

   Melting point <B> 239 '. </B> The resulting p-aminobenzenesulfonamide derivative can also be used in the form of its salts, e.g. B. of sodium or calcium, isolate.

 

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Herstellung von 2- (p-Amino- benzolsulfonamido) <B>- 5A7,8 -</B> tetrahydrochin- azolin, dadurch gekennzeichnet, dass man ein 2-Benzolsulfonamido <B>- 5,6,7,8 -</B> tetrahydrochin- azolin, das in p-Stellung einen durch Reduk tion in die Aminogruppe überführbaren Sub- stituenten aufweist, mit einem reduzierenden Mittel behandelt. Claim: Process for producing 2- (p-aminobenzenesulfonamido) -5A7,8- tetrahydroquinazoline, characterized in that a 2-benzenesulfonamido is used - 5,6,7,8 - </B> tetrahydroquinazoline, which has a substituent in the p-position which can be converted into the amino group by reduction, treated with a reducing agent. Die so erhaltene Verbindung soll als Heil mittel oder als Zwisehenprodukt Verwendung finden. The compound obtained in this way should be used as a medicinal product or as an intermediate product.
CH244345D 1939-05-23 1941-05-23 Process for the preparation of a benzenesulfonamide derivative. CH244345A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE244345X 1939-05-23

Publications (1)

Publication Number Publication Date
CH244345A true CH244345A (en) 1946-09-15

Family

ID=5925422

Family Applications (1)

Application Number Title Priority Date Filing Date
CH244345D CH244345A (en) 1939-05-23 1941-05-23 Process for the preparation of a benzenesulfonamide derivative.

Country Status (1)

Country Link
CH (1) CH244345A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578761A (en) * 1950-02-07 1951-12-18 Merck & Co Inc Alkanolamine salts of sulfaquinoxaline

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578761A (en) * 1950-02-07 1951-12-18 Merck & Co Inc Alkanolamine salts of sulfaquinoxaline

Similar Documents

Publication Publication Date Title
CH244345A (en) Process for the preparation of a benzenesulfonamide derivative.
CH244348A (en) Process for the preparation of a benzenesulfonamide derivative.
CH249997A (en) Process for the preparation of a benzenesulfonamide derivative.
CH244347A (en) Process for the preparation of a benzenesulfonamide derivative.
CH250001A (en) Process for the preparation of a benzenesulfonamide derivative.
CH244346A (en) Process for the preparation of a benzenesulfonamide derivative.
DE872947C (en) Process for the production of basic ethers, thioether and their salts
CH250000A (en) Process for the preparation of a benzenesulfonamide derivative.
CH250007A (en) Process for the preparation of a benzenesulfonamide derivative.
AT299202B (en) Process for the preparation of new substituted isoquinolines and their acid addition salts
CH250002A (en) Process for the preparation of a benzenesulfonamide derivative.
CH242487A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH240221A (en) Process for the preparation of a new benzenesulfonamide derivative.
DE642290C (en) Process for the representation of reduction products of the male sex hormone and similar substances
CH239683A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH239686A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH242492A (en) Process for the preparation of a new benzenesulfonamide derivative.
AT359479B (en) METHOD FOR PRODUCING NEW BENZOE ACIDS AND THEIR ESTERS AND SALTS
DE1917225C3 (en) 3,4-Dihydro-8-hydroxy-2 (1H) -isoquinolinecarboxamidine, its salts, processes for the preparation of these compounds and therapeutic preparations
CH239682A (en) Process for the preparation of a new benzenesulfonamide derivative.
DE668491C (en) Process for the preparation of salicylacylglycol esters
CH239691A (en) Process for the preparation of a new benzenesulfonamide derivative.
CH235567A (en) Process for the preparation of a new benzenesulfonamide derivative.
AT233010B (en) Process for the preparation of new benzo-dihydro-1, 2, 4-thiadiazine-1, 1-dioxyden
CH250005A (en) Process for the preparation of a benzenesulfonamide derivative.