CH204382A - Process for preparing an aminobenzenesulfonic acid amide compound. - Google Patents

Process for preparing an aminobenzenesulfonic acid amide compound.

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Publication number
CH204382A
CH204382A CH204382DA CH204382A CH 204382 A CH204382 A CH 204382A CH 204382D A CH204382D A CH 204382DA CH 204382 A CH204382 A CH 204382A
Authority
CH
Switzerland
Prior art keywords
acid amide
preparing
amide compound
aminobenzenesulfonic acid
acetic acid
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH204382A publication Critical patent/CH204382A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C311/00Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
    • C07C311/30Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups
    • C07C311/37Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups having the sulfur atom of at least one of the sulfonamide groups bound to a carbon atom of a six-membered aromatic ring

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung einer     Aminobenzolsulfonsäureamidverbindung.       Gemäss der im Patent Nr. 199315 beschrie  benen Erfindung sind gewisse     Aminoacyl-          und        Ogyacyl-aminoberizolsulfonsäureamide    so  wie deren     Substitutionsprodukte    durch ihre  Wirkung gegen bakterielle Infektionskrank  heiten ausgezeichnet.  



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung einer     Amino-          benzolsulfonsäureamidverbindung,    welches da  durch gekennzeichnet ist, dass man     4-(4'-Nitro-          berrzolsulfonamido)    -     benzolsulforramid    durch  Einwirken eines Reduktionsmittels zum     4-(4'-          Aminobenzolsulfonamido)    -     benzolsulfonamid          reduziert.    Als Reduktionsmittel verwendet  man vorzugsweise Eisenspäne in Gegenwart  von stark verdünnter Essigsäure. Man kann  aber auch andere gebräuchliche Reduktions  mittel verwenden, z.

   B. die Ausgangsverbin  dung in wässrig-alkalischer Lösung mit     Na-          triumhydrosulfit    reduzieren. Aus der Reduk  tionsmischung lässt sich das Reaktionspro  dukt in üblicher Weise abscheiden. Man kann    z. B. die Reaktionsmischung alkalisch machen  vom Eisenschlamm absaugen und das Reak  tionsprodukt aus dem Filtrat durch Ansäuern  mit Säuren, wie Essigsäure, ausfällen. Nach  dem     Ümkristallisieren,    z. B. aus verdünntem  Alkohol, bildet das so erhältliche     4-(4'-Amino-          benzolsulfonamido)-benzolsulfonamid    farblose  Kristalle vom Schmelzpunkt<B>1310.</B> Es ist in  kaltem Wasser schwer löslich, löst sich in  verdünnten Alkalien und soll therapeutische  Anwendung finden.

      <I>Beispiel:</I>  50 g     4-(4'-Nitroberizolsulfonamido)-benzol-          sulfonamid    (dargestellt durch Kondensation  von     4-Nitrobenzolsulfochlorid    mit     4-Amino-          benzolsulfonamid    in     Pyridin,    durch     Umlösen     aus Aceton und Wasser farblose Kristalle  vom Schmelzpunkt     219')    werden zu einer  kochenden Mischung von 100 g Eisenspänen,  500 cm' Wasser und 5 cm' Essigsäure ge  geben. Nach mehrstündigem Kochen der stark      gerührten Mischung unter     Rückfluss    wird ab  gekühlt, mit verdünnter Natronlauge alka  lisch gemacht und vom Eisen abgesaugt.

    Durch Ansäuern des Filtrates mit Essigsäure  wird das     4-(4'-Amiriobenzolstilfonamido)-ben-          zolsulfonamid    ausgefällt. Es bildet nach dein       Umkristallisieren    aus verdünntem Alkohol  farblose Kristalle vom Schmelzpunkt<B>1310.</B>  Anstelle mit Eisen zu reduzieren, kann man  die als Ausgangsstoff genannte     Nitroverbin-          dung    auch mit anderen gebräuchlichen Reduk  tionsmitteln reduzieren. Zum. Beispiel kann  man die Nitroverbindung irr wässriger Natron  lauge lösen und solange festes     Natriumhydro-          sulfit    unter schwacher Erwärmung zusetzen,  bis die Lösung dauernd entfärbt ist.

   Durch  Ansäuern der Lösung mit Essigsäure wird  die     Aminoverbindung    ausgefällt.



  Process for preparing an aminobenzenesulfonic acid amide compound. According to the invention described in patent no. 199315, certain aminoacyl- and ogyacyl-aminoberizolsulfonic acid amides as well as their substitution products are distinguished by their action against bacterial infectious diseases.



  The present patent relates to a process for the preparation of an aminobenzenesulphonic acid amide compound which is characterized in that 4- (4'-nitroberrzolsulphonamido) -benzenesulforramide is reduced to 4- (4'-aminobenzenesulphonamido) -benzenesulphonamide by the action of a reducing agent . Iron filings in the presence of very dilute acetic acid are preferably used as the reducing agent. But you can also use other common reducing agents such.

   B. reduce the starting compound in aqueous-alkaline solution with sodium hydrosulfite. The reaction product can be separated off in the usual way from the reduction mixture. You can z. B. make the reaction mixture alkaline from the iron sludge and the reac tion product from the filtrate by acidification with acids such as acetic acid, precipitate. After Umkristallisierung, z. B. from dilute alcohol, the 4- (4'-Amino-benzenesulfonamido) -benzenesulfonamide which can be obtained in this way forms colorless crystals with a melting point of <B> 1310. </B> It is sparingly soluble in cold water, dissolves in dilute alkalis and should find therapeutic application.

      <I> Example: </I> 50 g 4- (4'-nitroberizolsulfonamido) -benzenesulfonamide (produced by condensation of 4-nitrobenzenesulfonamide with 4-aminobenzenesulfonamide in pyridine, by dissolving from acetone and water colorless crystals with a melting point 219 ') are added to a boiling mixture of 100 g of iron filings, 500 cm of water and 5 cm of acetic acid. After boiling the vigorously stirred mixture under reflux for several hours, it is cooled, made alkaline with dilute sodium hydroxide solution and suctioned off the iron.

    The 4- (4'-amiriobenzolstilfonamido) -benzenesulfonamide is precipitated by acidifying the filtrate with acetic acid. After recrystallizing from dilute alcohol, it forms colorless crystals with a melting point of <B> 1310. </B> Instead of reducing with iron, the nitro compound mentioned as the starting material can also be reduced with other common reducing agents. To the. For example, you can dissolve the nitro compound in aqueous sodium hydroxide solution and add solid sodium hydrosulphite with gentle heating until the solution is permanently decolorized.

   The amino compound is precipitated by acidifying the solution with acetic acid.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer Amino- benzolsulfonsäureamidvei-bindung, dadurch ge- kennzeichnet, dass man 4-(4'-Nitrobenzolsulfon- amido)-benzolsulfonaniid durch Einwirken eines Reduktionsmittels zum 4-(4'-Aininoben- zolsulforramido)-beiizolsulfonamid reduziert. Das so erhältliche 4-(4'-Arniriobenzolsul- fonamido)-benzolsulforiamid bildet farblose Kristalle vom Schmelzpunkt 1311'. UNTERANSPRüCHE: 1. Claim: Process for the production of an aminobenzenesulphonic acid amide bond, characterized in that 4- (4'-nitrobenzenesulphonamido) -benzenesulphonamide is reduced by the action of a reducing agent to the 4- (4'-aminobenzenesulforramido) -beiizolsulphonamide. The 4- (4'-Arniriobenzolsulfonamido) -benzenesulforiamid thus obtainable forms colorless crystals with a melting point of 1311 '. SUBCLAIMS: 1. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als Reduktions mittel Eisenspäne und verdünnte Essig säure verwendet. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Reduktion in wässrig-alkalischer Lösung mittels Na triumhydrosulfit bewirkt. Method according to claim, characterized in that iron filings and dilute acetic acid are used as reducing agents. 2. The method according to claim, characterized in that the reduction is effected in an aqueous-alkaline solution by means of sodium hydrosulfite.
CH204382D 1936-02-06 1937-01-12 Process for preparing an aminobenzenesulfonic acid amide compound. CH204382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE204382X 1936-02-06

Publications (1)

Publication Number Publication Date
CH204382A true CH204382A (en) 1939-04-30

Family

ID=5781532

Family Applications (1)

Application Number Title Priority Date Filing Date
CH204382D CH204382A (en) 1936-02-06 1937-01-12 Process for preparing an aminobenzenesulfonic acid amide compound.

Country Status (1)

Country Link
CH (1) CH204382A (en)

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