CH246834A - Process for the preparation of the N, N-dimethyl-carbamic acid ester of 3-oxy-1-methyl-pyridinium bromide. - Google Patents

Process for the preparation of the N, N-dimethyl-carbamic acid ester of 3-oxy-1-methyl-pyridinium bromide.

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Publication number
CH246834A
CH246834A CH246834DA CH246834A CH 246834 A CH246834 A CH 246834A CH 246834D A CH246834D A CH 246834DA CH 246834 A CH246834 A CH 246834A
Authority
CH
Switzerland
Prior art keywords
carbamic acid
dimethyl
acid ester
methyl
ogy
Prior art date
Application number
Other languages
German (de)
Inventor
F Hoffmann- Aktiengesellschaft
Original Assignee
Hoffmann La Roche
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 Hoffmann La Roche filed Critical Hoffmann La Roche
Publication of CH246834A publication Critical patent/CH246834A/en

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  • Pyridine Compounds (AREA)

Description

  

  Verfahren zur Darstellung des     NN-Dimethyl-carbaminsäureesters     des     3-Oxy-l-methyl-pyridiniumbromids.       Salze der     disubstituierten        Carbaminsäure-          ester    des     m-Oxy-phenyl-trimethylammoniums,     wie z. B. der     Dimethyl-carbaminsäureester    des       m-Ogy-phenyl-trimethylammonium-bromids,     haben .sich als wertvolle     Arzneimittel    er  wiesen.  



  Es     wurde        nun    gefunden, dass die Salze der       N,N-disubstituierten        Carbaminsäureester    des       N-Alkyl-3-ogy-pyridiniums    der allgemeinen  Formel  
EMI0001.0015     
    wobei     R1    und R2     Alkyl-,        Aryl-    oder     Aralkyl-          reste,        R3        Alkylreste    und     M    ein Halogen oder  einen     Alkylsulfatrest    bedeuten,

       ähnliche    phy  siologische     Eigenschaften    besitzen. Die     disub-          stituierten        Carbaminsäureester    des 3 -     Ogy-          pyridins    sind bis, jetzt ebenfalls nicht be  kannt. Sie zeigen ähnliche, doch abge  schwächte     Wirkung    wie die     quaternären     Verbindungen.  



  Die     N,N-disubstituierten        Carbaminsäure-          ester    des 3 -     Ogy    -     pyridins        entstehen    durch       Einwirkung        disubstituierter        Carbaminsäure-          chloride    auf     3-Ogy-pyridin.    Sie     können    auch       gewonnen    werden,

   indem man     Phos.gen    auf  3 -     Ogy    -     pyridin        einwirken        1'ässt    und darauf  den     entstandenen        Chlorameisensäureester    des         3-Ogy-pyridins    mit dem entsprechenden     disub-          stituierten        Amin    versetzt.

   Durch Addition  von     Alkylhalogeniden        bezw.        Dialkyluulfaten     an diese     tertiären    Basen gewinnt man die  entsprechenden     hochwirksamen        quaternären          Pyridiniumsalze.     



       Gegenstand        des        vorliegenden-Patentes    ist  ein Verfahren zur Darstellung     des;        N,N-Di-          methyl-carbaminsäureesters    des     3-Ogy-l-me-          thyl-pyridiniumbromids,        welches,    dadurch ge  kennzeichnet     ist,

      dass     3-Ogy-pyridin        mittels     eines     Dimethyl-carbaminsäurehalogenids        ver-          estert    und auf     das        Reaktionsprodukt        Methyl-          bromid        einwirken    gelassen wird.  



  Der     bisher    unbekannte     N,N    -     Dimethyl-          carbaminsäureester    de 3- -     Ogy    -     methyl    -     pyr-          idiniumbromids    bildet     farblose,    stark hygro  skopische     stalle,    die bei 151-152  schmel  zen. Sie sind mit     neutraler    Reaktion in Was  ser leicht löslich,     ziemlich        löslich    in niederen       Alkoholen,    schwer in Aceton, unlöslich in  Äther und Benzol.

   Der Ester soll als:     Arznei-          mittel    verwendet werden.    <I>Beispiel: -</I>  12     Gewichtsteile        Dimethyl-carbaminsäure-          chlorid,        gelöst    in 20     Gewichtsteilen        Xylol,     werden zu einer siedenden     Lösung    von 19       Gewichtsteilen        3-Ogy-pyridin    in 120     Ge-          wichtsteilen        Xylol    getropft.

   Man erwärmt  noch<B>3:</B> Stunden am     Rückfluss.    Wenn die Lö  sung erkaltet ist,     wird    sie vom     ausgefallenen              ss-Oxy-pyridinhydrochlorid    getrennt und mit  Wasser     gewaschen,    Nach dem Trocknen über       Natriumsulfat    destilliert man das     Xylol    ab  und fraktioniert den Rückstand unter ver  mindertem Druck. Der<B>NN</B> -     Dimethyl.    -     carb-          aminsäureester    des     3-Ogy-pyridins        destilliert     bei 148 /15     mm.     



  Eine Lösung von 20 Gewichtsteilen     1VIe-          thylbromid    in 30     Gewichtsteilen    Aceton wird  einer Lösung von 35     Gewichtsteilen        N,N-Di-          methyl-carbaminsäureester        des    3 -     Ogy    -     pyr-          idins    in 70 Gewichtsteilen Aceton zugegeben.

    Nach längerem Stehen scheidet sich der     N,N-          Dimethyl    -     carbaminsäureester    des 3 -     Ogy        -1-          methyl-pyridiniumbromids    aus. Er kann aus  absolutem Alkohol     umkristallisiert    werden.



  Process for the preparation of the NN-dimethyl-carbamic acid ester of 3-oxy-1-methyl-pyridinium bromide. Salts of the disubstituted carbamic acid esters of m-oxy-phenyl-trimethylammonium, such as. B. the dimethyl-carbamic acid ester of m-Ogy-phenyl-trimethylammonium bromide, have .sich as valuable drugs, he proved.



  It has now been found that the salts of the N, N-disubstituted carbamic acid esters of N-alkyl-3-ogy-pyridinium of the general formula
EMI0001.0015
    where R1 and R2 are alkyl, aryl or aralkyl radicals, R3 is alkyl radicals and M is a halogen or an alkyl sulfate radical,

       have similar physiological properties. The disubstituted carbamic acid esters of 3-ogypyridine are likewise not known up to now. They show a similar, but weakened effect as the quaternary compounds.



  The N, N-disubstituted carbamic acid esters of 3-Ogy-pyridine are formed by the action of disubstituted carbamic acid chlorides on 3-Ogy-pyridine. They can also be won

   by allowing phosgene to act on 3-Ogy-pyridine and then adding the corresponding disubstituted amine to the resulting chloroformic acid ester of 3-Ogy-pyridine.

   By addition of alkyl halides respectively. Dialkyl sulfates on these tertiary bases are used to obtain the corresponding highly effective quaternary pyridinium salts.



       Subject of the present patent is a method for the representation of the; N, N-dimethyl-carbamic acid ester of 3-Ogy-l-methyl-pyridinium bromide, which is characterized by

      that 3-ogy-pyridine is esterified by means of a dimethyl carbamic acid halide and the reaction product methyl bromide is allowed to act.



  The previously unknown N, N - dimethylcarbamic acid ester de 3- - Ogy - methyl - pyridinium bromide forms colorless, strongly hygroscopic stalls that melt at 151-152. They are easily soluble in water with a neutral reaction, fairly soluble in lower alcohols, difficult in acetone, insoluble in ether and benzene.

   The ester is intended to be: used as a medicament. <I> Example: - </I> 12 parts by weight of dimethyl carbamic acid chloride, dissolved in 20 parts by weight of xylene, are added dropwise to a boiling solution of 19 parts by weight of 3-ogypyridine in 120 parts by weight of xylene.

   The mixture is refluxed for a further 3 hours. When the solution has cooled down, it is separated from the precipitated β-oxy-pyridine hydrochloride and washed with water. After drying over sodium sulfate, the xylene is distilled off and the residue is fractionated under reduced pressure. The <B> NN </B> - dimethyl. - Carbamic acid ester of 3-Ogy-pyridine distilled at 148/15 mm.



  A solution of 20 parts by weight of 1Viethyl bromide in 30 parts by weight of acetone is added to a solution of 35 parts by weight of N, N-dimethylcarbamic acid ester of 3-Ogy-pyridine in 70 parts by weight of acetone.

    After standing for a long time, the N, N-dimethyl-carbamic acid ester of 3-Ogy -1-methyl-pyridinium bromide separates out. It can be recrystallized from absolute alcohol.

 

Claims (1)

PATENTAINTSPRUCH Verfahren zur Darstellung des N,N-Di- methyl - carbaminsäureesters des 3 - Ogy -1- methyl-pyridiniumbromids, dadurch gekenn zeichnet, PATENTAIN CLAIM Process for the preparation of the N, N-dimethyl-carbamic acid ester of 3-Ogy -1-methyl-pyridinium bromide, characterized in that dass 3-Ogy-pyridin mittels eines Di- methyl-carbaminsäurehalogenids verestert und auf das Reahtionsprodükt 1VIethylbromid ein- wirken gelassen wird. that 3-Ogy-pyridine is esterified by means of a dimethyl-carbamic acid halide and allowed to act on the reaction product 1VIethylbromid. Der bisher unbekannte N,N-Dimethyl- carbaminsäureester des 3-Ogy-l-methyl-pyr- idiniumbromids bildet farblose, stark hygro skopische Kristalle, die bei 151-152 schmel zen. Sie sind mit neutraler Reaktion in Was ser leicht löslich, ziemlich löslich in niederen Alkoholen, schwer in Aceton, unlöslich in Äther und Benzol. The previously unknown N, N-dimethylcarbamic acid ester of 3-Ogy-1-methyl-pyridinium bromide forms colorless, strongly hygroscopic crystals that melt at 151-152. They are easily soluble in water with a neutral reaction, fairly soluble in lower alcohols, difficult in acetone, insoluble in ether and benzene.
CH246834D 1945-07-26 1945-07-26 Process for the preparation of the N, N-dimethyl-carbamic acid ester of 3-oxy-1-methyl-pyridinium bromide. CH246834A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH246834T 1945-07-26

Publications (1)

Publication Number Publication Date
CH246834A true CH246834A (en) 1947-01-31

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ID=4465811

Family Applications (1)

Application Number Title Priority Date Filing Date
CH246834D CH246834A (en) 1945-07-26 1945-07-26 Process for the preparation of the N, N-dimethyl-carbamic acid ester of 3-oxy-1-methyl-pyridinium bromide.

Country Status (2)

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CH (1) CH246834A (en)
ES (1) ES174415A1 (en)

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Publication number Publication date
ES174415A1 (en) 1946-09-16

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