CH311616A - 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
CH311616A
CH311616A CH311616DA CH311616A CH 311616 A CH311616 A CH 311616A CH 311616D A CH311616D A CH 311616DA CH 311616 A CH311616 A CH 311616A
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 CH311616A publication Critical patent/CH311616A/en

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Description

  

  Verfahren zur Herstellung eines neuen basisch substituierten Fettsäure  (2-halogen-6-methyl-anilids).    Gegenstand des vorliegenden Patentes bil  det. ein Verfahren zur Herstellung eines neuen       basisch    substituierten     Fettsäure-(2-halogen-6-          methyl-a.nilids),    welches dadurch gekennzeich  net ist, dass man eine Verbindung der Formel  
EMI0001.0004     
    in welcher X einen     reaktionsfähigen,    während  der Reaktion sich abspaltenden Rest bedeutet,  mit     Piperidin    umsetzt.  



  Der Rest X kann in einem Halogenatom  oder einem sonstigen für den Austausch gegen  den Basisehen Rest geeigneten reaktionsfähi  gen     Substituenten,    wie z. B. einer     Alky1sul-          fonyloxy-    oder     Arylsulfonyloxygruppe,    beste  ,     hen.    Der     Austausch    der Gruppe X gegen den       Piperidinrest    erfolgt z.

   B. durch     einfaches     Erwärmen mit     Piperidin    gegebenenfalls in       Gegenwart    eines basisch reagierenden Konden  sationsmittels oder von     Piperidin    im Über  ;     schuss.    Das     N-Piperidin-acet-(2-chlor-6-methyl-          anilid)    ist ein Öl, das nach einiger Zeit zu  farblosen, bei 107-108  schmelzenden Kri  stallen erstarrt. Das Hydrochlorid der Base  schmilzt bei     172-173 .     



  Das neue     Anilid    soll als Lokalanästhetikum       und    als     Zwischenprodukt    zur Herstellung wei  terer Derivate Verwendung finden.         Beispiel:     44 Gewichtsteile     Chloracet-(2-chlor-6-me-          thylanilid)    (gewonnen durch     Umsetzen    von 2  Chlor-6-methyl-anilin mit     Chloracetylchlorid     in     Gegenwart    von     Natriumacetat,        Schmp.    140  bis 141 ) werden in 80 Gewichtsteilen Äthanol  suspendiert und mit 46 Gewichtsteilen     Piperi-          din    versetzt.

   Die Temperatur steigt dabei  leicht an und ein grosser Teil des Reaktions  gemisches geht in Lösung. Nun wird während  4     Stunden    bei     Zimmertemperatur        gerührt    und  dann einige Stunden bei 65-75 . Eine Probe  mit Wasser und nachfolgend mit verdünnter  Salzsäure versetzt, ergibt wieder Lösung des  ausgefallenen Niederschlages. Mit Wasser  dampf wird hierauf der Alkohol und das über  schüssige     Piperidin    abgeblasen und nach dem  Erkalten das zurückbleibende Öl in Äther auf  genommen. Nach dem Trocknen der ätheri  schen Lösung und Verjagen des Lösungsmit  tels verbleibt ein Öl, das durch Vakuumdestil  lation gereinigt wird.

   Man erhält 45 Gewichts  teile     reines    N-     Piperidino    -     acet-    (2 -     chlor-6-me-          thj-anilid'),    was einer Ausbeute von 83      /o-    ent  spricht. Die     Umsetzung    mit     Piperidin    kann  auch in Benzol stattfinden.



  Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide). Subject of the present patent bil det. a process for the preparation of a new basic substituted fatty acid (2-halogen-6-methyl-a.nilids), which is characterized in that a compound of the formula
EMI0001.0004
    in which X is a reactive radical which is split off during the reaction, is reacted with piperidine.



  The radical X can be in a halogen atom or other reactive substituents suitable for replacement with the basic radical, such as. B. an alky1sulfonyloxy or arylsulfonyloxy group, best hen. The exchange of group X against the piperidine residue takes place, for.

   B. by simply heating with piperidine, optionally in the presence of a basic condensation agent or piperidine in the over; shot. N-piperidine-acet- (2-chloro-6-methyl-anilide) is an oil that solidifies after a while to form colorless crystals that melt at 107-108. The base hydrochloride melts at 172-173.



  The new anilide is to be used as a local anesthetic and as an intermediate for the production of further derivatives. Example: 44 parts by weight of chloroacet- (2-chloro-6-methylanilide) (obtained by reacting 2 chloro-6-methyl-aniline with chloroacetyl chloride in the presence of sodium acetate, melting point 140 to 141) are suspended in 80 parts by weight of ethanol and mixed with 46 parts by weight of piperidine.

   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 65-75. A sample with water and then mixed with dilute hydrochloric acid results in a solution of the precipitate again. The alcohol and excess piperidine are then blown off with steam and, after cooling, the remaining oil is taken up in ether. After the ethereal solution has dried and the solvent has been chased away, an oil remains that is cleaned by vacuum distillation.

   45 parts by weight of pure N-piperidino-acet- (2-chloro-6-methy-anilide) are obtained, which corresponds to a yield of 83%. The reaction with piperidine can also take place in benzene.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen basisch substituierten Fettsäure-(2-halogen-6- methyl-anilids), dadurch gekennzeichnet, dass man eine Verbindung der Formel EMI0002.0001 in welcher X einen reaktionsfähigen, während der Reaktion sich abspaltenden Rest bedeutet, mit Piperidin umsetzt. Das auf diese Weise erhaltene 1N-Piperidino-acet-(2'-chlor-6-methyl- anilid) bildet. ein Öl, das nach einiger Zeit zu farblosen, bei 101-10811 schmelzenden Kri stallen erstarrt. Das Hvdroehlorid der Base schmilzt bei 172-173 . PATENT CLAIM: Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide), characterized in that a compound of the formula EMI0002.0001 in which X is a reactive radical which is split off during the reaction, is reacted with piperidine. The 1N-piperidino-acet- (2'-chloro-6-methyl-anilide) obtained in this way forms. an oil that solidifies after a while to colorless crystals that melt at 101-10811. The hydrochloride of the base melts at 172-173. Das neue Anilid soll als Lokalanästhetikum und als Zwischenprodukt Verwendung finden. UNTERANSPRUCH Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man ein Halogenacet-(2- chlor-6-methyl-anilid) mit Piperidin reagieren lässt. The new anilide will be used as a local anesthetic and as an intermediate product. SUBSTANTIAL CLAIM Process according to patent claim, characterized in that a haloacet- (2-chloro-6-methyl-anilide) is allowed to react with piperidine.
CH311616D 1952-02-25 1952-02-25 Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide). CH311616A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH311616T 1952-02-25
CH307799T 1952-11-25

Publications (1)

Publication Number Publication Date
CH311616A true CH311616A (en) 1955-11-30

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ID=25735349

Family Applications (1)

Application Number Title Priority Date Filing Date
CH311616D CH311616A (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)

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CH (1) CH311616A (en)

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