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CH174281A - Process for the preparation of acetyltropic acid-2,2-dimethyl-3-piperidyl-propanol ester. - Google Patents

Process for the preparation of acetyltropic acid-2,2-dimethyl-3-piperidyl-propanol ester.

Info

Publication number
CH174281A
CH174281A CH174281DA CH174281A CH 174281 A CH174281 A CH 174281A CH 174281D A CH174281D A CH 174281DA CH 174281 A CH174281 A CH 174281A
Authority
CH
Switzerland
Prior art keywords
piperidyl
dimethyl
preparation
ester
acid
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
Priority claimed from DEH136773D external-priority patent/DE594085C/en
Publication of CH174281A publication Critical patent/CH174281A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

  

  Verfahren zur Darstellung von     Acetyltropasäure-2,2-dimethyl-3-piperidyl-propanolester.       Die Ester von     Aminoalkoholen    der all  gemeinen Formel  
EMI0001.0003     
    wobei R ein     Alkyl    und R' ein     Alkyl    oder  Wasserstoff bedeutet, mit aromatischen Säuren  sind sehr stark wirksame     Lokalanästhetica.     



  Es wurde nun gefunden, dass in den fett  aromatischen Estern dieser     Aminoalkohole     die     lokalanästhetische    Wirkung fast völlig  zurücktritt, dass ihnen aber statt dessen eine  ausserordentlich starke     krampflösendeWirkung     zukommt, die bei einzelnen Gliedern die  Wirkung des     Papaverins    erheblich übertrifft.  



  Die als Ausgangsstoffe dienenden     Amino-          alkohole    können aus den nach den Verfahren  der Patentschriften Nr. 147156, 151127 bis  151130, 151134 und 151135 erhaltenen       Aminoaldehyden    durch Reduktion mit Na  triumamalgam in schwach essigsaurer Lösung  gewonnen werden.

      Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Darstellung von     Acetyl-          tropasäur,    e-2,     2-dimethyl-3-piperi        dyl-        propanol-          ester,    welches dadurch gekennzeichnet ist,  dass man auf     2,2-Dimethyl-3-piperidyl-pro-          panol    eine     VerbindunLy    der Formel  
EMI0001.0023     
    einwirken lässt. R bedeutet einen bei der  Reaktion     sichabspaltendenRest,wieHydrogyl,     Halogen oder     Ogalkyl.     



  Der     Acetyltropasäure-2,2-dimetbyl-3-pi-          peridyl-propanolester    bildet ein hellgelbes Öl  von alkalischer Reaktion. Seine Salze mit  Mineralsäuren sind leicht löslich in Wasser.  Der Ester soll als Arzneimittel Verwendung  finden.  



  <I>Beispiel:</I>  49 Teile     Acetyltropasäurechlorid    werden  in 110 Teilen Chloroform gelöst und ein  Gemisch von 39 Teilen 2,2-Dimethyl-3-           piperidyl-propylalkohol    und 60 Teilen Chloro  form unter Wasserkühlung     zugetropft.    Man  erwärmt noch 3 Stunden auf 50 o und schüt  telt die gelbe homogene Lösung dreimal mit  je 100 Teilen Wasser aus. Die wässerige  Lösung wird mit Äther extrahiert und vom  gelösten Äther durch Absaugen befreit. Man  gibt so lange eine etwa 50     o/oige    Lösung von       Kaliumjodid    in Wasser zu, als sich noch Öl  ausscheidet.

   Das Öl wird vom Wasser ge  trennt, mit wenig Wasser gewaschen und in  wässeriger Aufschlämmung mit     Natrium-          carbonatlösung    bis zur alkalischen Reaktion       versetzt.    Die in Freiheit gesetzte Base wird  in Äther aufgenommen. Durch Verdampfen  des     Äthers    erhält man das Reaktionsprodukt  als hellgelbes Öl von alkalischer Reaktion.



  Process for the preparation of acetyltropic acid-2,2-dimethyl-3-piperidyl-propanol ester. The esters of amino alcohols of the general formula
EMI0001.0003
    where R is alkyl and R 'is alkyl or hydrogen, with aromatic acids are very effective local anesthetics.



  It has now been found that in the fatty aromatic esters of these amino alcohols the local anesthetic effect disappears almost completely, but that instead they have an extraordinarily strong antispasmodic effect which considerably exceeds the effect of papaverine in individual limbs.



  The amino alcohols used as starting materials can be obtained from the amino aldehydes obtained by the process of patents Nos. 147156, 151127 to 151130, 151134 and 151135 by reduction with sodium amalgam in a weakly acetic acid solution.

      The present invention is a process for the preparation of acetyl tropic acid, e-2, 2-dimethyl-3-piperidyl propanol ester, which is characterized in that one on 2,2-dimethyl-3-piperidyl-pro - panol a compound of the formula
EMI0001.0023
    can act. R denotes a radical which is split off during the reaction, such as hydroyl, halogen or Ogalkyl.



  The acetyl tropic acid 2,2-dimethyl-3-piperidyl-propanol ester forms a light yellow oil with an alkaline reaction. Its salts with mineral acids are easily soluble in water. The ester is said to be used as a drug.



  <I> Example: </I> 49 parts of acetyltropic acid chloride are dissolved in 110 parts of chloroform and a mixture of 39 parts of 2,2-dimethyl-3-piperidylpropyl alcohol and 60 parts of chloroform are added dropwise with water cooling. The mixture is heated to 50 o for a further 3 hours and the yellow homogeneous solution is extracted three times with 100 parts of water each time. The aqueous solution is extracted with ether and freed from the dissolved ether by suction. An approximately 50% solution of potassium iodide in water is added as long as oil still separates.

   The oil is separated from the water, washed with a little water and, in an aqueous suspension, mixed with sodium carbonate solution until an alkaline reaction is achieved. The base that has been set free is taken up in ether. Evaporation of the ether gives the reaction product as a light yellow oil from an alkaline reaction.

 

Claims (1)

PATENTANSPRÜC11 Verfahren zur Darstellung von Acetyl tropasäure-2,2-dimethyl-3-piperidyl-propanol- ester, dadurch gekennzeichnet, dass man auf 2,2-Dimetbyl-3-piperidyl-propanoi eine Ver bindung der Formel EMI0002.0013 einwirken lässt. . DerAcetyltropasäure-2,2-dimethyl-3-piperi- dyl-propanolester bildet ein hellgelbes Öl von alkalischer Reaktion. Seine Salze mit Mineral säuren sind leicht löslich in Wasser. Der Ester soll als Arzneimittel Verwendung finden. - PATENTANSPRÜC11 Process for the preparation of acetyl tropic acid-2,2-dimethyl-3-piperidyl-propanol- ester, characterized in that there is a compound of the formula on 2,2-dimetbyl-3-piperidyl-propanoi EMI0002.0013 can act. . The acetyltropic acid 2,2-dimethyl-3-piperidyl-propanol ester forms a light yellow oil from an alkaline reaction. Its salts with mineral acids are easily soluble in water. The ester is said to be used as a drug. -
CH174281D 1932-03-22 1933-02-16 Process for the preparation of acetyltropic acid-2,2-dimethyl-3-piperidyl-propanol ester. CH174281A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE139454X 1932-03-22
CH168876T 1933-02-16
DEH136773D DE594085C (en) 1932-03-22 1933-07-07 Process for the production of basic esters of fatty acids

Publications (1)

Publication Number Publication Date
CH174281A true CH174281A (en) 1934-12-31

Family

ID=34068601

Family Applications (8)

Application Number Title Priority Date Filing Date
CH168876D CH168876A (en) 1932-03-22 1933-02-16 Process for the preparation of tropic acid-2.2-dimethyl-3-diethylaminopropanol ester.
CH174279D CH174279A (en) 1932-03-22 1933-02-16 Process for the preparation of phenylbromoallylacetic acid 2,2-dimethyl-3-diethylaminopropanol ester.
CH174281D CH174281A (en) 1932-03-22 1933-02-16 Process for the preparation of acetyltropic acid-2,2-dimethyl-3-piperidyl-propanol ester.
CH174280D CH174280A (en) 1932-03-22 1933-02-16 Method for the preparation of rac. Acetylmandelic acid 2,2-dimethyl-3-dimethylaminopropanol ester.
CH174913D CH174913A (en) 1932-03-22 1933-02-16 Process for the preparation of acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester.
CH174282D CH174282A (en) 1932-03-22 1933-02-16 Process for the preparation of benzilic acid-2,2-dimethyl-3-diethylaminopropanol ester.
CH174278D CH174278A (en) 1932-03-22 1933-02-16 Process for the preparation of a-phenylbutyric acid-2.2-dimethyl-3-diethylaminopropanol ester.
CH174912D CH174912A (en) 1932-03-22 1934-02-06 Process for the preparation of 1-acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester.

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CH168876D CH168876A (en) 1932-03-22 1933-02-16 Process for the preparation of tropic acid-2.2-dimethyl-3-diethylaminopropanol ester.
CH174279D CH174279A (en) 1932-03-22 1933-02-16 Process for the preparation of phenylbromoallylacetic acid 2,2-dimethyl-3-diethylaminopropanol ester.

Family Applications After (5)

Application Number Title Priority Date Filing Date
CH174280D CH174280A (en) 1932-03-22 1933-02-16 Method for the preparation of rac. Acetylmandelic acid 2,2-dimethyl-3-dimethylaminopropanol ester.
CH174913D CH174913A (en) 1932-03-22 1933-02-16 Process for the preparation of acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester.
CH174282D CH174282A (en) 1932-03-22 1933-02-16 Process for the preparation of benzilic acid-2,2-dimethyl-3-diethylaminopropanol ester.
CH174278D CH174278A (en) 1932-03-22 1933-02-16 Process for the preparation of a-phenylbutyric acid-2.2-dimethyl-3-diethylaminopropanol ester.
CH174912D CH174912A (en) 1932-03-22 1934-02-06 Process for the preparation of 1-acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester.

Country Status (1)

Country Link
CH (8) CH168876A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3103308A1 (en) * 1981-01-31 1982-08-26 Dynamit Nobel Ag, 5210 Troisdorf METHOD FOR PRODUCING (ALPHA) -HYDROXIMETHYLENARYL VESSEL ESTERS

Also Published As

Publication number Publication date
CH174282A (en) 1934-12-31
CH168876A (en) 1934-04-30
CH174279A (en) 1934-12-31
CH174913A (en) 1935-01-31
CH174280A (en) 1934-12-31
CH174912A (en) 1935-01-31
CH174278A (en) 1934-12-31

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