CH174912A - Process for the preparation of 1-acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester. - Google Patents

Process for the preparation of 1-acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester.

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Publication number
CH174912A
CH174912A CH174912DA CH174912A CH 174912 A CH174912 A CH 174912A CH 174912D A CH174912D A CH 174912DA CH 174912 A CH174912 A CH 174912A
Authority
CH
Switzerland
Prior art keywords
ester
dimethyl
diethylaminopropanol
preparation
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
Priority claimed from DEH136773D external-priority patent/DE594085C/en
Application filed by Hoffmann La Roche filed Critical Hoffmann La Roche
Publication of CH174912A publication Critical patent/CH174912A/en

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

Description

  

  Verfahren zur Darstellung     -von        1-Aceti#ltropasäure-2,2-diinethyl-3-          diäthylaminopr        opanolester    .    Die Ester von     Aminoalkoholen    der all  gemeinen Formel:  
EMI0001.0006     
    wobei R ein     Alkyl    und R' ein     Alkyl    oder  Wasserstoff bedeutet, mit aromatischen Säu  ren, sind sehr stark wirkende     Lokal-          anaesthetica.     



  Es wurde nun gefunden, dass in     den,    fett  aromatischen Estern dieser     Aminoalkohole     die     lokalanaesthetische    Wirkung fast völlig  zurücktritt. dass ihnen aber statt dessen eine  ausserordentlich starke krampflösende     W        ir-          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, 151134 und 15113<B>5</B> erhaltenen       Aminoaldehyden    durch     Reduktion    mit     Na-          triumamalga-m    in schwach essigsaurer Lösung  gewonnen werden.  



  Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Darstellung von     1-          Acetyltropasäure    - 2,2 -     dimethyl    - 3 -     diäthyl-          aminopropanolester,    welches dadurch ge  kennzeichnet ist, dass man auf     2,2-Dimethyl-          3-diäthylaminopropanol    die     1-Form        einer    Ver  bindung der Formel:  
EMI0001.0033     
    in welcher R einen bei der     Reduktion    sich  abspaltenden Rest, z. B.     Hydrogyl,    Halogen  oder     Oxalkyl    bedeutet, einwirken lässt.  



  Der     1-Acetyltropasäure-2,2-dimethyl-3-di-          äthylaminopropanolester    stellt ein farbloses  01 dar, Er dreht das polarisierte Licht nach  links. WD = -20  . Seine Salze mit Mineral-           säuren    lösen sich leicht in Wasser; in Al  kohol sind sie schwer, in Chloroform unlös  lich. Die     Acetylgruppe    kann durch Einwir  kung von Säuren leicht     abgespalten    werden.  Der Ester soll als Arzneimittel     Verwendung     finden.  



  <I>Beispiel</I>  Man versetzt 166 Teile     1-Tropasäure    mit  120 Teilen     Acetylehlorid    und hält vier  Stunden bei 40  . Hierauf fügt man 20G Teile       Toluol    und 200     Teile        Thionylchlorid    zu und  erwärmt weitere     fünf    Stunden auf 50  . Nach  Beendigung .der Reaktion wird das über  schüssige     Thionylchlorid    im Vakuum voll  ständig     abdestilliert.    Um die letzten Reste  zu entfernen, gibt man nochmals     Toluol    zum  Rückstand und     destilliert        wiederum        im    Va  kuum völlig ab.

   Man nimmt nun den Rück  stand in 200 Teilen Benzol auf und fügt ihn  langsam zu einer gekühlten Lösung von 318  Teilen     2,2-Dimethyl-3-diäthylaminopropanol     hinzu. Es fallen alsbald     Kristalle    des     Hydro-          chlorids    dieses Alkohols aus, während der ge  bildete Ester in     Lösung    bleibt. Nach ein  tägigem     Stehen    saugt man die     Benzollösung     durch eine     Nutsche,    trocknet sie und dampft  das Benzol ab. Der     1-Acetyltropasäureester       des     2,2-Dimethyl-3-diäthylaminopropanols     bleibt als 01 zurück.



  Process for the preparation of 1-aceti # ltropic acid-2,2-diinethyl-3-diethylaminopropanol ester. The esters of amino alcohols of the general formula:
EMI0001.0006
    where R is alkyl and R 'is alkyl or hydrogen, with aromatic acids, are very powerful local anesthetics.



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



  The amino alcohols used as starting materials can be obtained from the amino aldehydes obtained by the methods of patents 147156, 151127 to 151130, 151134 and 15113 by reduction with sodium amalgam in a weakly acetic acid solution.



  The present invention relates to a process for the preparation of 1-acetyltropic acid-2,2-dimethyl-3-diethyl aminopropanol ester, which is characterized in that the 1-form of a Ver binding the formula:
EMI0001.0033
    in which R is a residue which is split off during the reduction, e.g. B. Hydrogen, halogen or oxalkyl means, can act.



  The 1-acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester is a colorless oil, it turns the polarized light to the left. WD = -20. Its salts with mineral acids dissolve easily in water; They are heavy in alcohol and insoluble in chloroform. The acetyl group can easily be split off by the action of acids. The ester is said to be used as a drug.



  <I> Example </I> 166 parts of 1-tropic acid are mixed with 120 parts of acetyl chloride and hold at 40 for four hours. 20G parts of toluene and 200 parts of thionyl chloride are then added and the mixture is heated to 50 for a further five hours. After the reaction has ended, the excess thionyl chloride is completely distilled off in vacuo. To remove the last residue, toluene is again added to the residue and it is again completely distilled off in vacuo.

   The residue is now taken up in 200 parts of benzene and slowly added to a cooled solution of 318 parts of 2,2-dimethyl-3-diethylaminopropanol. Crystals of the hydrochloride of this alcohol immediately precipitate, while the ester formed remains in solution. After standing for a day, the benzene solution is sucked through a suction filter, dried and the benzene evaporated. The 1-acetyltropic acid ester of 2,2-dimethyl-3-diethylaminopropanol remains as oil.

 

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Darstellung von 1-Acetyl tropasäure-2,2-dimethyl-3-diäthylaminopropa- nolester, dadurch gekennzeichnet, dass man auf 2,2 - Dimethyl-3-diäthylaminopropanol die 1-Form einer Verbindung der Formel: EMI0002.0031 worin R einen bei der Reaktion sich abspal tenden Rest bedeutet, einwirken lässt. Der 1-Acetyltropasäure-2:2-dimethyl-3-di-- äthylaminopropaDolester stellt ein farbloses 01 dar. Er dreht das polarisierte Licht nach links. WD = -20 . Seine Salze mit Mineral säuren lösen sich leicht in Wasser; in Al kohol sind sie schwer-. in Chloroform unlös lich. <B> PATENT CLAIM: </B> Process for the preparation of 1-acetyl tropic acid-2,2-dimethyl-3-diethylaminopropanol ester, characterized in that the 1-form of a Compound of the formula: EMI0002.0031 where R is a radical which splits off during the reaction, can act. The 1-acetyl tropic acid-2: 2-dimethyl-3-di-- äthylaminopropaDolester is a colorless 01. It turns the polarized light to the left. WD = -20. Its salts with mineral acids easily dissolve in water; They are heavy in alcohol. insoluble in chloroform. Die Acetylgruppe kann durch Einvv-ir- kung von Säuren leicht abgespalten werden. Der Ester soll als Arzneimittel Verwendung finden. The acetyl group can easily be split off by the action of acids. The ester is said to be used as a drug.
CH174912D 1932-03-22 1934-02-06 Process for the preparation of 1-acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester. CH174912A (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
CH174912A true CH174912A (en) 1935-01-31

Family

ID=34068601

Family Applications (8)

Application Number Title Priority Date Filing Date
CH174281D CH174281A (en) 1932-03-22 1933-02-16 Process for the preparation of acetyltropic acid-2,2-dimethyl-3-piperidyl-propanol ester.
CH174282D CH174282A (en) 1932-03-22 1933-02-16 Process for the preparation of benzilic acid-2,2-dimethyl-3-diethylaminopropanol ester.
CH174913D CH174913A (en) 1932-03-22 1933-02-16 Process for the preparation of acetyltropic 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.
CH174279D CH174279A (en) 1932-03-22 1933-02-16 Process for the preparation of phenylbromoallylacetic acid 2,2-dimethyl-3-diethylaminopropanol ester.
CH174280D CH174280A (en) 1932-03-22 1933-02-16 Method for the preparation of rac. Acetylmandelic acid 2,2-dimethyl-3-dimethylaminopropanol ester.
CH168876D CH168876A (en) 1932-03-22 1933-02-16 Process for the preparation of tropic 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 (7)

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

Country Status (1)

Country Link
CH (8) CH174281A (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
CH174279A (en) 1934-12-31
CH174281A (en) 1934-12-31
CH174282A (en) 1934-12-31
CH174278A (en) 1934-12-31
CH168876A (en) 1934-04-30
CH174913A (en) 1935-01-31
CH174280A (en) 1934-12-31

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