CH311638A - Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide). - Google Patents

Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide).

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Publication number
CH311638A
CH311638A CH311638DA CH311638A CH 311638 A CH311638 A CH 311638A CH 311638D A CH311638D A CH 311638DA CH 311638 A CH311638 A CH 311638A
Authority
CH
Switzerland
Prior art keywords
anilide
methyl
halogen
fatty acid
production
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Cilag
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 CH311638A publication Critical patent/CH311638A/en

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Description

  

      Verfahren    zur Herstellung eines neuen basisch substituierten Fettsäure  (2-halogen-6.methyl-anilids).    Gegenstand     cies    vorliegenden Patentes bil  det ein Verfahren zur Herstellung eines neuen  basisch substituierten     Fettsäure-(2-halogen-6-          inethyl-anilids),    welches dadurch gekennzeich  net ist, dass man eine Verbindung der Formel  
EMI0001.0005     
    in welcher X einen reaktionsfähigen, während  der Reaktion sieh abspaltenden Rest bedeutet,  mit     Piperazin    umsetzt.  



  Der Rest X kann in einem Halogenatom  oder einem sonstigen für den Austausch gegen       den    basischen Rest geeigneten reaktionsfähigen       Substituenten,    wie z. B. einer     Alky1sulfonyl-          oxy-    oder     Arylsulfonyloxygruppe,    bestehen.  Der Austausch der     Gruppe    X gegen den       Piperazinrest        erfolgt    z.

   B. durch einfaches Er  wärmen mit     Piperazin    gegebenenfalls in Ge  genwart eines basisch reagierenden Konden  sationsmittels oder von     Piperazin    im     Über-          schuss.    Das     N-Piperazinyl-essigsäure-(2-chlor-          6-methyl-anilid)    ist ein Öl, das nach einiger  Zeit zu farblosen, bei     93-95     schmelzenden  Kristallen erstarrt.  



  Das neue     Anilid    soll als Lokalanästhetikum  und als Zwischenprodukt zur Herstellung wei  terer Derivate Verwendung finden.    <I>Beispiel:</I>  44 Gewichtsteile     Chloracet-(2-chlor-6-me-          thyl-anilid)        (gewonnen    durch Umsetzen von       2-Chlor-6-inethyl-anilin    mit     Cliloracetylchlorid     in Gegenwart von     Natriumacetat,        Schmp.    140  bis 141 )

   werden in 150     Gewichtsteilen        Ätha-          nol    suspendiert und mit 120     Gewichtsteilen          Piperazinhvclrat    versetzt. Die Temperatur  steigt dabei leicht an, und ein grosser Teil des  Reaktionsgemisches geht in Lösung.     Nun    wird  während 4 Stunden bei Zimmertemperatur ge  rührt und dann einige Stunden bei 70-80 .

    Anschliessend versetzt man mit Wasser, wobei  die als     Nebenprodukt    gebildete, sehr schwer  wasserlösliche     Bis-Verbindung        Pipera.zinyl-          N,N'    -bis -     essigsäure    - (2 -     chlor-6-methyl-anilid)     ausfällt. Diese wird     abfiltriert    und das Filtrat  mit Wasserdampf behandelt. Dann wird mit  Kochsalz gesättigt und nach dem Erkalten  mit Äther ausgeschüttelt. Nach dem Trocknen  der ätherischen Lösung und Verjagen des Lö  sungsmittels verbleibt ein Öl, das nach einiger  Zeit zu Kristallen erstarrt.

   Man erhält 50     Ge-          wichtsteile    reines     N-Pipera.zinyl-essigsäure-(2-          chlor-6-methyl-anilid).    Die Umsetzung kann  auch mit wasserfreiem     Piperazin    in Benzol  stattfinden.



      Process for the production of a new basic substituted fatty acid (2-halogen-6.methyl-anilids). The subject of this patent is a process for the preparation of a new basic substituted fatty acid (2-halogen-6-ynethyl-anilide), which is characterized in that a compound of the formula
EMI0001.0005
    in which X denotes a reactive radical which is split off during the reaction, with piperazine.



  The radical X can be in a halogen atom or any other reactive substituent suitable for replacement with the basic radical, such as. B. an alky1sulfonyl oxy or arylsulfonyloxy group exist. The exchange of group X against the piperazine residue takes place, for.

   B. by simply heating it with piperazine, possibly in the presence of a basic condensation agent or of piperazine in excess. N-piperazinyl-acetic acid- (2-chloro-6-methyl-anilide) is an oil that solidifies after some time to colorless crystals that melt at 93-95.



  The new anilide is to be used as a local anesthetic and as an intermediate for the production of further derivatives. <I> Example: </I> 44 parts by weight of chloroacet- (2-chloro-6-methyl-anilide) (obtained by reacting 2-chloro-6-methyl-aniline with chloroacetyl chloride in the presence of sodium acetate, melting point 140 up to 141)

   are suspended in 150 parts by weight of ethanol and mixed with 120 parts by weight of Piperazinhvclrat. The temperature rises slightly and a large part of the reaction mixture goes into solution. The mixture is then stirred for 4 hours at room temperature and then for a few hours at 70-80.

    Then water is added, the very poorly water-soluble bis-compound pipera.zinyl-N, N'-bis-acetic acid (2-chloro-6-methyl-anilide) formed as a by-product precipitating. This is filtered off and the filtrate is treated with steam. Then it is saturated with table salt and shaken out with ether after cooling. After the essential solution has dried and the solvent has been chased away, an oil remains that solidifies into crystals after a while.

   50 parts by weight of pure N-pipera.zinyl-acetic acid (2-chloro-6-methyl-anilide) are obtained. The reaction can also take place with anhydrous piperazine in benzene.

 

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines neuen basisch substituierten Fettsäure-(2-halogen-6- methyl-anilids), dadurch gekennzeichnet, da.ss man eine Verbindung der Formel EMI0002.0001 in welcher X einen reaktionsfähigen, während der Reaktion sieh abspaltenden Rest bedeutet, mit Piperazin umsetzt. Das auf diese Weise erhaltene N-Piperazinyl-essigsäure-(2-chlor-6- methyl-anilid) bildet ein Öl, das nach einiger Zeit zu farblosen, bei 93-95 schmelzenden Kristallen erstarrt. Das neue Anilid soll als Lokalanästhetikum und als Zwischenprodukt Verwendung finden. PATENT CLAIM Process for the preparation of a new basic substituted fatty acid (2-halogen-6-methyl-anilide), characterized in that one is a compound of the formula EMI0002.0001 in which X denotes a reactive radical which is split off during the reaction, with piperazine. The N-piperazinyl-acetic acid- (2-chloro-6-methyl-anilide) obtained in this way forms an oil which solidifies after some time to colorless crystals which melt at 93-95. The new anilide will be used as a local anesthetic and as an intermediate product. UNTERANSPRUCH Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man ein Halogenacet-(2- chlor-6-methyl-anilid) mit. Piperazin reagieren lässt. SUBClaimed method according to claim, characterized in that one haloacet- (2-chloro-6-methyl-anilide) with. Piperazine can react.
CH311638D 1952-02-25 1952-02-25 Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide). CH311638A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH311638T 1952-02-25
CH307799T 1952-11-25

Publications (1)

Publication Number Publication Date
CH311638A true CH311638A (en) 1955-11-30

Family

ID=25735371

Family Applications (1)

Application Number Title Priority Date Filing Date
CH311638D CH311638A (en) 1952-02-25 1952-02-25 Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide).

Country Status (1)

Country Link
CH (1) CH311638A (en)

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