CH329572A - Process for the preparation of basic amides - Google Patents

Process for the preparation of basic amides

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Publication number
CH329572A
CH329572A CH329572DA CH329572A CH 329572 A CH329572 A CH 329572A CH 329572D A CH329572D A CH 329572DA CH 329572 A CH329572 A CH 329572A
Authority
CH
Switzerland
Prior art keywords
acid
preparation
formula
substituted
basic amides
Prior art date
Application number
Other languages
German (de)
Inventor
Hans Dipl Chem Mueller
Original Assignee
Cilag 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 Cilag Ag filed Critical Cilag Ag
Publication of CH329572A publication Critical patent/CH329572A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D207/00Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D207/02Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/04Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
    • C07D207/08Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon radicals, substituted by hetero atoms, attached to ring carbon atoms

Description

  

   <Desc/Clms Page number 1> 
 Verfahren    zur      Herstellung   basischer    Amide      b   Gegenstand des Patentes bildet ein Verfahren zur Herstellung basischer    Amide   der Formel Ar    -NII-CO-R   Am, in welcher Ar ein mindestens in 2- und    6-Stel-      lung      dLtrch      Substituenten   erster Ordnung substituiertes    Phenylradikal,   R einen niederen    Alkylenrest   und Am eine substituierte    Amino-      gruppe   bedeutet. Verbindungen dieser Art    sowie   ihre    lokalanästhetische   Wirkung sind zum Teil schon bekannt (vgl. z. B.

   USA-Patent Nr. 2441.498,    Brit.   Patent Nr. 705460). 



  Das erfindungsgemässe Verfahren ist.    da-      durch      gekennzeichnet,   dass man auf ein    Phos-      phazo-anilid   der Formel    Ar-N-P-NI3-Ar   eine basisch substituierte Fettsäure der Formel    1IOOC-R-Am   einwirken lässt. 



  Die Umsetzung erfolgt vorzugsweise in einem    inerten      L0slulgs-   bzw. Verdünnungsmittel und bei erhöhter Temperatur. Die    Phos-      phazo-anilide   können durch Reaktion eines Anilins mit einem    Phosphortrihalogenid   erhalten werden. 



  Dass die Umsetzung der basisch substituierten Fettsäuren mit den    Phosphazo-anili-      cien   zu den gewünschten basischen.    Amiden   führen würde, war nicht    vorauszusehen.      II.   W.    Crimiuel   et    a1.,   beschrieben in    Jour.   Am.    Chefin.      Soe.   68, S. 539    usf.   (1.946), die Umset-    zung   von    aliphatis & ##Il;   -aromatischen und    heterocyclisehen   Säuren mit    Phösphazo-anili-      den,   die allerdings zu den erwarteten    Acyl-      anili.nen   führten.

   Die Autoren betonen aber in ihrer Arbeit, dass    aliphatische      Aminosäu-      ren,   wie z. B.    Glycin   und    Alanin,   sieh nicht mit    Phospliazo-aniliden   umsetzen liessen. 



  Beispiel 1 283 g    2-Chlor-6-methyl-anilin   in 400    cm3   absolutem Benzol werden tropfenweise unter Aussenkühlung mit einer Lösung von 55 g    Phosphortrichlorid   in 150    em3   absolutem Benzol versetzt. Man filtriert anschliessend das ,    -tusoefallene      2-Chlor-6-methyl-anilin-hydro-      chlorid   ab und verdampft das Filtrat zur    Trockne.   Der Rückstand, bestehend aus dem    2-Chlor   - 6    -methyl-phenyl-phosphazo-2-chlor-6-      methyl-anilid,   stellt eine bräunliche, halb kristalline Masse dar.

   Diese wird ohne Reinigung in 300    em3   Chloroform gelöst, mit 65g    Di-      äthylaminoessigsäure   versetzt. und das Ganze acht Stunden zum Sieden erhitzt. Anschlie- ssend gibt man Äther zu, schüttelt einige Male mit verdünnter Natronlauge aus und verdampft das Lösungsmittel. Den Rückstand löst man in    verdünnter   Salzsäure, gibt Kohle zu, filtriert und macht mit. Natronlauge alkalisch. Das sieh ausscheidende Öl wird in Äther aufgenommen, die ätherische Lösung nach dem Trocknen    verdampft   und der Rückstand im    Iloclivakuum   destilliert.

   Man erhält das    Di-      ätliyla.ininoessig-      äure-2-elilor-6-metliyl-anilid   

 <Desc/Clms Page number 2> 

 als farbloses Öl, das unter 0,05 mm bei 125" C siedet. Dieses Öl erstarrt nach einiger Zeit zu Kristallen, die bei    52--53    C schmelzen. Die    Ausbeute   beträgt 70 g. 



  In gleicher Weise    wie   hier für    Diäthyl-      aminoessigsäure   beschrieben kann man beispielsweise    Dimethylaminoessigsäure,      ri-Pro-      pylaminoessigsäure,      n-Butylaminoessigsäure,      Butylbenzylaminoessigsäure,      Pyrrolidinoessig-      säure,      Piperidinoessigsäure   und entsprechend substituierte    Propion-   und Buttersäuren zur    L?rnsetzung   bringen. 



     Beispiel   2 242 g    2,6-Dimethy      1-anilin   in 600    cm3   absolutem Benzol werden unter Aussenkühlung und Rühren mit 55 g    Phosphortrichlorid   in 150    ein      absolutem   Benzol tropfenweise    ver-      setzt.   Nach fünf Stunden wird das ausgefallene    2,6-Dimethyl-anilin-hydrochlorid      abge-      sauugt   und das Filtrat eingedampft. Der Rückstand wird, wie in Beispiel 1 angegeben, mit 65g    Diäthy      laminoessigsäure   zur Reaktion gebracht. Die Aufarbeitung    erfolgt   gleich wie in Beispiel 1 beschrieben.

   Man erhält 126    g   (das    sind      etwa      70      %      d.      Th.)      Diäthy      laininoessigsäur      e-      2,6-dimetliy      1-anilid,   das unter 0,04 mm bei 135  C siedet. 



  An. Stelle des    2,6-Dimethyl-anilins   kann auch ein anderes substituiertes Anilin zur    Umsetzung   gebracht werden, z. B.    2,4,6-Tri-      metlit-l-anilin      (lIesidin),   und an Stelle    von      1)iätlivlaminoessigsäure,   z. B.    Pyrrolidino-      essigsäure      u.   a. m. 



  In gleicher Weise wie in den Beispielen    beschrieben   lassen sich die folgenden basischen    Amide   der Formel 
 EMI2.55 
 herstellen: 
 EMI2.56 
 RR, R3 AM Schmelzpunkt  C Hydrochlorid -C113 -C113 -C112 -N\ H I 198-199 C113\ -C113 -C113 -C112 -N/ H i 200-202 CH C113\ -C113 -C113 -CH- -N H ( 248-249 C113 C113/ C113\ -C113 -CL -C112 -N H i 228-230 C113/ 

 <Desc/Clms Page number 3> 

 
 EMI3.1 
 R, R3 Am Schmelzpunkt  C Hydrochlorid -C113 -CL -C112 1 @ H 194-196 CH3@ -C113 -CL -CH- -N/ H 244-246 C113 C113 -CL -CL -C112 - N H 220,5-221,5



   <Desc / Clms Page number 1>
 Process for the preparation of basic amides b The subject of the patent is a process for the preparation of basic amides of the formula Ar -NII-CO-R Am, in which Ar is a phenyl radical which is substituted at least in the 2- and 6-position dLtrch substituents of the first order, R a is a lower alkylene radical and Am is a substituted amino group. Compounds of this type as well as their local anesthetic effect are already known in some cases (see e.g.

   U.S. Patent No. 2441,498, Brit. Patent No. 705460).



  The inventive method is. characterized in that a phosphazo-anilide of the formula Ar-N-P-NI3-Ar is allowed to act on a base-substituted fatty acid of the formula 10OC-R-Am.



  The reaction is preferably carried out in an inert solvent or diluent and at an elevated temperature. The phosphazo-anilides can be obtained by reacting an aniline with a phosphorus trihalide.



  That the conversion of the basic substituted fatty acids with the phosphazo-anilicien to the desired basic. Amiden was unpredictable. II. W. Crimiuel et al., Described in Jour. At the. Boss. Soe. 68, p. 539 etc. (1.946), the implementation of aliphatis &##Il; -aromatic and heterocyclic acids with phösphazo-anilides, which, however, led to the expected acyl-anilines.

   However, the authors emphasize in their work that aliphatic amino acids such as B. glycine and alanine, see not allowed to react with phospliazo-anilides.



  Example 1 283 g of 2-chloro-6-methyl-aniline in 400 cm3 of absolute benzene are added dropwise with external cooling with a solution of 55 g of phosphorus trichloride in 150 cm3 of absolute benzene. The 2-chloro-6-methyl-aniline hydrochloride which has precipitated is then filtered off and the filtrate is evaporated to dryness. The residue, consisting of the 2-chloro-6-methyl-phenyl-phosphazo-2-chloro-6-methyl-anilide, is a brownish, semi-crystalline mass.

   This is dissolved in 300 cubic meters of chloroform without purification, and 65 g of diethylaminoacetic acid are added. and boiled the whole thing for eight hours. Then ether is added, shaken out a few times with dilute sodium hydroxide solution and the solvent is evaporated. Dissolve the residue in dilute hydrochloric acid, add charcoal, filter and take part. Caustic soda alkaline. The oil which separates out is taken up in ether, the ethereal solution is evaporated after drying and the residue is distilled in an Iloclivakuum.

   The diethyl amino acetic acid 2-elilor-6-methyl anilide is obtained

 <Desc / Clms Page number 2>

 as a colorless oil that boils below 0.05 mm at 125 "C. This oil solidifies after a while to form crystals which melt at 52-53 C. The yield is 70 g.



  In the same way as described here for diethylaminoacetic acid, for example, dimethylaminoacetic acid, ri-propylaminoacetic acid, n-butylaminoacetic acid, butylbenzylaminoacetic acid, pyrrolidinoacetic acid, piperidinoacetic acid and correspondingly substituted propionic and butyric acids can be dissolved.



     Example 2 To 242 g of 2,6-dimethyl-1-aniline in 600 cm3 of absolute benzene, 55 g of phosphorus trichloride in 150 of an absolute benzene are added dropwise with external cooling and stirring. After five hours, the precipitated 2,6-dimethyl aniline hydrochloride is suctioned off and the filtrate is evaporated. As indicated in Example 1, the residue is reacted with 65g diethylaminoacetic acid. Working up is carried out in the same way as described in Example 1.

   126 g (about 70% of theory) diethylaininoacetic acid 2,6-dimethyl 1-anilide which boils below 0.04 mm at 135 ° C. are obtained.



  On. Instead of the 2,6-dimethyl aniline, another substituted aniline can also be reacted, e.g. B. 2,4,6-tri-metlit-l-aniline (lesidin), and instead of 1) iätlivlaminoacetic acid, z. B. pyrrolidino acetic acid u. a. m.



  In the same way as described in the examples, the following basic amides of the formula
 EMI2.55
 produce:
 EMI2.56
 RR, R3 AM melting point C hydrochloride -C113 -C113 -C112 -N \ HI 198-199 C113 \ -C113 -C113 -C112 -N / H i 200-202 CH C113 \ -C113 -C113 -CH- -NH (248 -249 C113 C113 / C113 \ -C113 -CL -C112 -NH i 228-230 C113 /

 <Desc / Clms Page number 3>

 
 EMI3.1
 R, R3 At melting point C hydrochloride -C113 -CL -C112 1 @ H 194-196 CH3 @ -C113 -CL -CH- -N / H 244-246 C113 C113 -CL -CL -C112 - NH 220.5-221 , 5

 

Claims (1)

PATFNTANSPRUCII Verfahren zur Herstellung basischer Amide der Formel Ar-NIH-CO-R-Am, in welcher Ar ein mindestens in 2- und 6-Stel- lung durch Substituenten erster Ordnung substituiertes Phenylradikal, R einen niederen Alkylenrest und Am eine substituierte Amino- gruppe bedeutet, dadurch gekennzeichnet, dass man auf ein Phosphazo-anilid der Formel Ar-N=P -1,#TH-Ar eine Basisehe substituierte Fettsäure der Formel HOOC-R-Am einwirken lässt. PATFNTANSPRUCII Process for the preparation of basic amides of the formula Ar-NIH-CO-R-Am, in which Ar is a phenyl radical substituted at least in the 2- and 6-position by substituents of the first order, R is a lower alkylene radical and Am is a substituted amino group means, characterized in that a phosphazo-anilide of the formula Ar-N = P -1, # TH-Ar is allowed to act on a base-substituted fatty acid of the formula HOOC-R-Am.
CH329572D 1954-07-29 1954-07-29 Process for the preparation of basic amides CH329572A (en)

Applications Claiming Priority (1)

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CH329572T 1954-07-29

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CH329572A true CH329572A (en) 1958-04-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532306A1 (en) * 1982-08-27 1984-03-02 Pharmaton Sa BASIC ACETANILIDES, PROCESS FOR THEIR PREPARATION AND MEDICAMENTS CONTAINING THE SAME

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532306A1 (en) * 1982-08-27 1984-03-02 Pharmaton Sa BASIC ACETANILIDES, PROCESS FOR THEIR PREPARATION AND MEDICAMENTS CONTAINING THE SAME

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