CH179698A - Process for the preparation of mandelic acid-2,2-dimethyl-3-diethylaminopropanol ester. - Google Patents

Process for the preparation of mandelic acid-2,2-dimethyl-3-diethylaminopropanol ester.

Info

Publication number
CH179698A
CH179698A CH179698DA CH179698A CH 179698 A CH179698 A CH 179698A CH 179698D A CH179698D A CH 179698DA CH 179698 A CH179698 A CH 179698A
Authority
CH
Switzerland
Prior art keywords
ester
dimethyl
mandelic acid
preparation
diethylaminopropanol
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
Priority claimed from DEH136773D external-priority patent/DE594085C/en
Application filed by Hoffmann La Roche filed Critical Hoffmann La Roche
Publication of CH179698A publication Critical patent/CH179698A/en

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Description

  

  Verfahren zur Darstellung von     3landelsäure-2,2-dimethyl-3-diäthylaminopropanolester.       Die Ester vor)     Aminoalkoholen    der all  gemeinen Formel  
EMI0001.0003     
    wobei R ein     Alkyl    und R' ein     Alkyl    oder       Wasserstoff    bedeutet, mit aromatischen Säu  ren sind sehr stark wirksame     Lokalanästhe-          tica.     



  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 krampflösende Wir  kung zukommt, die bei einzelnen Gliedern  die Wirkung des     Papaverins    erheblich     über-          trifft.     



  Die als     Ausgangsstoffe    dienenden     Amino-          alkohole    können aus den nach den Ver  fahren der Patentschriften 147156, 151127  bis 151130, 152134 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 Man  delsäure - 2,2 -     dimethyl    - 3 -     diäthylaminopro-          panolester,    welches dadurch gekennzeichnet  ist, dass man auf     2,2-Dimethyl-3-diäthyl-          aminopropylhalogenide    ein Salz der Mandel  säure einwirken lässt.  



  Die bisher unbekannten Halogenverbin  dungen des     2,2-Dimethyl-3-diäthylamirropro-          panols    entstehen leicht und in guter Ausbeute  bei der Einwirkung der üblichen     Halogenie-          rungsmittel,    wie zum Beispiel     Thionylchlorid.     Es sind farblose, im Vakuum     unzersetzt     destillierbare Öle, die mit den Halogen  wasserstoffsäuren feste Salze bilden.  



  Der     Maridelsäure-2,2-dimethyl-3-diäthyl-          aminoppopanolester    bildet feine Kristalle vom  Schmelzpunkt 67  . Seine Salze mit Mineral  säuren sind leicht löslich in Wasser. Der  Ester soll als Arzneimittel Verwendung finden.      <I>Beispiel</I>  19 Teile mandelsaures Kalium gibt man  zu einer Lösung von 15 Teilen     2,2-Dimethyl-          3-diäthylaminopropylchlorid    in 100 Teilen       gylol    und erhitzt unter Rühren 10 Stunden  auf<B>110'.</B> Nach dem Erkalten rührt man die  Lösung mit Wasser und Säure aus, trennt  die wässerige Schicht ab und fällt durch  Zusatz von Lauge den gebildeten Ester aus.

    Durch Aufnehmen in Äther, Trocknen mit  entwässertem Natriumsulfat und Einengen  der filtrierten Lösung auf ein kleines Volumen  gewinnt man den     Mandelsäure-2,2-dimethyl-          ss--diäthylaminopropanolester    in Form feiner  Kristalle.



  Process for the preparation of 3landelic acid-2,2-dimethyl-3-diethylaminopropanol ester. The esters before) 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 147156, 151127 to 151130, 152134 and 151135 by reduction with sodium amalgam in a weakly acetic acid solution.



  The present invention relates to a process for the preparation of almond acid - 2,2 - dimethyl - 3 - diethylaminopro- panol ester, which is characterized in that a salt of almond acid is acted on 2,2-dimethyl-3-diethyl aminopropyl halide leaves.



  The hitherto unknown halogen compounds of 2,2-dimethyl-3-diethylamirropropanol are formed easily and in good yield when exposed to the usual halogenating agents, such as thionyl chloride. They are colorless oils that can be distilled in a vacuum without decomposing and that form solid salts with the hydrogen halide.



  The 2,2-dimethyl-3-diethyl aminopopanol ester of maridelic acid forms fine crystals with a melting point of 67. Its salts with mineral acids are easily soluble in water. The ester is said to be used as a drug. <I> Example </I> 19 parts of almond-acid potassium are added to a solution of 15 parts of 2,2-dimethyl-3-diethylaminopropyl chloride in 100 parts of glycol and the mixture is heated to 110 ° for 10 hours while stirring After cooling, the solution is stirred with water and acid, the aqueous layer is separated off and the ester formed is precipitated by adding alkali.

    By taking up in ether, drying with dehydrated sodium sulphate and concentrating the filtered solution to a small volume, the mandelic acid 2,2-dimethyl-ss-diethylaminopropanol ester is obtained in the form of fine crystals.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 14I' andel- säure-2,2 - dimethyl- 3 -diäthyl aminopropanol- ester, dadurch gekennzeichnet, dass man auf 2, 2-Di in ethyl-3-di äthyl ami n opropylb a1 ogen i d e ein Salz der Mandelsäure einwirken lässt. Der Mandelsäure-2, PATENT CLAIM: Process for the preparation of 14I 'andelic acid-2,2-dimethyl-3-diethyl aminopropanol ester, characterized in that one enters into 2, 2-di in ethyl-3-di-ethyl aminopropylb a1 ogen ide Let the salt of the mandelic acid take effect. The mandelic acid-2, 2-dimethyl-3-diäthyl- amiiiopropanolester bildet feine Kristalle vom Schmelzpunkt<B>67</B> . Seine Salze mit Mineral säuren sind leicht löslich in Wasser. Der Ester soll als Arzneimittel Verwendung finden. 2-dimethyl-3-diethyl amiiiopropanol ester forms fine crystals with a melting point of <B> 67 </B>. Its salts with mineral acids are easily soluble in water. The ester is said to be used as a drug.
CH179698D 1932-03-22 1934-02-06 Process for the preparation of mandelic acid-2,2-dimethyl-3-diethylaminopropanol ester. CH179698A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE139454X 1932-03-22
DEH136773D DE594085C (en) 1932-03-22 1933-07-07 Process for the production of basic esters of fatty acids
CH174811T 1934-02-06

Publications (1)

Publication Number Publication Date
CH179698A true CH179698A (en) 1935-09-15

Family

ID=34068605

Family Applications (3)

Application Number Title Priority Date Filing Date
CH179696D CH179696A (en) 1932-03-22 1934-02-06 Process for the preparation of d-tropic acid-2,2-dimethyl-3-diethylaminopropanol ester.
CH179697D CH179697A (en) 1932-03-22 1934-02-06 Process for the preparation of 1-tropic acid-2,2-dimethyl-3-dimethylaminopropanol ester.
CH179698D CH179698A (en) 1932-03-22 1934-02-06 Process for the preparation of mandelic acid-2,2-dimethyl-3-diethylaminopropanol ester.

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CH179696D CH179696A (en) 1932-03-22 1934-02-06 Process for the preparation of d-tropic acid-2,2-dimethyl-3-diethylaminopropanol ester.
CH179697D CH179697A (en) 1932-03-22 1934-02-06 Process for the preparation of 1-tropic acid-2,2-dimethyl-3-dimethylaminopropanol ester.

Country Status (1)

Country Link
CH (3) CH179696A (en)

Also Published As

Publication number Publication date
CH179697A (en) 1935-09-15
CH179696A (en) 1935-09-15

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