CH174913A - Process for the preparation of acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester. - Google Patents

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

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Publication number
CH174913A
CH174913A CH174913DA CH174913A CH 174913 A CH174913 A CH 174913A CH 174913D A CH174913D A CH 174913DA CH 174913 A CH174913 A CH 174913A
Authority
CH
Switzerland
Prior art keywords
ester
diethylaminopropanol
dimethyl
acid
preparation
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 CH174913A publication Critical patent/CH174913A/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     Acetyltropasäure-2,2-dimethyl-3-          diätliylaminopropaiiolester.       Die Ester von     Aminoalkoholen    der all  gemeinen Formel:  
EMI0001.0004     
    wobei R ein     Alkyl    und R' ein     Alkyl    oder  Wasserstoff bedeutet, mit aromatischen Säu  ren, sind sehr stark wirksame     Lokal-          anaesthetica.     



  Es wurde gefunden, dass in den fett  aromatischen Estern dieser     Aminoalkohole     die     lokalanaesthetische    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,<B>151127</B>    bis 151130, 151134 und 151185 erhaltenen       Aminoaldehyden    durch Reduktion mit Na  triumamalgam in schwach essigsaurer Lösung  gewonnen werden.  



  Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Darstellung von       Acetyltropasäure    - 2,2 -     dimethyl    - 3 -     dVäthyl-          aminopropanolester,    welches ,dadurch     ge-          kennzeichnet    ist, dass man auf     2,2-Dimethyl-          3-diäthylaminopropanol    eine Verbindung der  Formel  
EMI0001.0025     
    einwirken lässt. R bedeutet einen bei der       Reaktion    sieh abspaltenden Rest, wie     Hyd-          rogyl,    Halogen oder     Ogalkyl.     



  Der     Acetyltropasäure-2,2-dimethyl-3-di-          äthylaminopropanolester    stellt ein farbloses       0i    dar. Das     Hydrojodid    bildet farblose     Nä-          delchen    vom     Schmelzpunkt   <B>92'.</B> Sie lösen      sich in Wasser; in Alkohol sind sie schwer-,  in     Xther    oder Chloroform unlöslich. Die  wässerige Lösung reagiert schwach sauer und       schmeckt    bitter. Die     Acetylgruppe    kann  dusch     Einwirkung    von Säuren leicht abge  spalten werden. Der Ester soll als Arzneimittel  Verwendung finden.  



  <I>Beispiel:</I>  Mau bereitet aus 18 Teilen     Tropasäure          (a-Phenyl-ss-öxypropionsäure)    durch Einwir  kung von     Acetyl-    und     Thionylchlorid    in be  kannter Weise das     Acetyltropasäurechlorid.     22,6 Teile     Acetyltropasäurechlorid    werden im  Verlauf einer     halben    Stunde unter Rühren  und Kühlen zu einer Lösung von 31,8 Tei  len     2,2-Dimethyl-3-diäthylaminopropanol    in  Benzol gegeben und die Mischung stehen ge  lassen.

   Nach 24 Stunden     nutscht    man das  ausgefallene Hydrochlorid des     Aminoalkohols     ab und extrahiert die     benzolische        Lösung     des     A.cetyltropasäure-2,2-dimethyl-3-diäthyl-          aminopropanolesters    mit normaler Salzsäure.  Beim Versetzen der sauren Lösung mit Am  moniak fällt der Ester als<B>01</B> aus.

   Durch  Einwirkung einer     konzentrierten    Lösung von       Kaliumjodid    auf die Lösung des Esters in  verdünnter Salzsäure erhält man das     Hydro-          jodid    des     Acetyltropasäureesters    des 2,2-Di-         methyl-3-diäthylaminopropanols    als langsam       erstarendes    Öl, das nach dem     Umkristalli-          sieren    aus einem     Gemisch    von Alkohol und       Ither    farblose     Nädelchen    vom Schmelzpunkt  92   bildet.



  Process for the preparation of acetyltropic acid-2,2-dimethyl-3-dietliylaminopropaiiol ester. The esters of amino alcohols of the general formula:
EMI0001.0004
    where R is alkyl and R 'is alkyl or hydrogen, with aromatic acids, are very effective local anesthetics.



  It has 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 significantly exceeds the effect of papaverine in individual members.



  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 151185 by reduction with sodium amalgam in a weakly acetic acid solution.



  The present invention relates to a process for the preparation of acetyltropic acid - 2,2 - dimethyl - 3 - dVäthylaminopropanolester, which is characterized in that 2,2-dimethyl-3-diethylaminopropanol is a compound of the formula
EMI0001.0025
    can act. R denotes a radical which is split off during the reaction, such as hydrogen, halogen or ogalkyl.



  The acetyltropic acid 2,2-dimethyl-3-diethylaminopropanol ester is a colorless oil. The hydroiodide forms colorless needles with a melting point of <B> 92 '. </B> They dissolve in water; they are sparingly soluble in alcohol and insoluble in ether or chloroform. The aqueous solution reacts slightly acidic and tastes bitter. 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> Mau prepares the acetyltropic acid chloride from 18 parts of tropic acid (a-phenyl-ss-oxypropionic acid) through the action of acetyl and thionyl chloride in a known manner. 22.6 parts of acetyltropic acid chloride are added over half an hour with stirring and cooling to a solution of 31.8 parts of 2,2-dimethyl-3-diethylaminopropanol in benzene and the mixture is allowed to stand.

   After 24 hours, the precipitated amino alcohol hydrochloride is filtered off with suction and the benzene solution of the 2,2-dimethyl-3-diethyl aminopropanol ester of acetyltropic acid is extracted with normal hydrochloric acid. When ammonia is added to the acidic solution, the ester precipitates as <B> 01 </B>.

   The action of a concentrated solution of potassium iodide on the solution of the ester in dilute hydrochloric acid gives the hydroiodide of the acetyltropic acid ester of 2,2-dimethyl-3-diethylaminopropanol as a slowly solidifying oil which, after recrystallizing from a mixture of Alcohol and ither form colorless needles with a melting point of 92.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von Acetyl tropasäure-2,?-dimethyl-3-diäthylaminopropa- nolester, dadurch gekennzeichnet, dass man auf 2.2' - Dimethy l -3 - diäthylaminopropanol eine Verbindung der Formel- EMI0002.0036 einwirken lässt. Der Acetyltropasäure-2,2-dimethyl-3-di- äthylaminopropanolester stellt ein farbloses 0l dar. PATENT CLAIM: Process for the preparation of acetyl tropic acid-2,? - dimethyl-3-diethylaminopropanol ester, characterized in that a compound of the formula 2.2 '- dimethy l -3 - diethylaminopropanol EMI0002.0036 can act. The acetyltropic acid 2,2-dimethyl-3-diethylaminopropanol ester is a colorless oil. Das Hydrojodid bildet farblose Nä- delchen vom Schmelzpunkt<B>92'.</B> Sie löseu sich in Wasser; in Alkohol sind .sie schwer-, in Äther oder Chloroform unlöslich. Die wässerige Lösung reagiert schwach sauer und schmeckt bitter. Die Acetylgruppe kann durch Einwirkung von Säuren leicht abge spalten werden. Der Ester soll als Arzneimittel Verwendung finden. The hydroiodide forms colorless needles with a melting point of <B> 92 '. </B> They dissolve in water; They are sparingly soluble in alcohol and insoluble in ether or chloroform. The aqueous solution reacts slightly acidic and tastes bitter. The acetyl group can easily be split off by the action of acids. The ester is said to be used as a drug.
CH174913D 1932-03-22 1933-02-16 Process for the preparation of acetyltropic acid-2,2-dimethyl-3-diethylaminopropanol ester. CH174913A (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
CH174913A true CH174913A (en) 1935-01-31

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.
CH174282D CH174282A (en) 1932-03-22 1933-02-16 Process for the preparation of benzilic 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.
CH174281D CH174281A (en) 1932-03-22 1933-02-16 Process for the preparation of acetyltropic acid-2,2-dimethyl-3-piperidyl-propanol ester.
CH174913D CH174913A (en) 1932-03-22 1933-02-16 Process for the preparation of acetyltropic 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.
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 (4)

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.
CH174282D CH174282A (en) 1932-03-22 1933-02-16 Process for the preparation of benzilic 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.
CH174281D CH174281A (en) 1932-03-22 1933-02-16 Process for the preparation of acetyltropic acid-2,2-dimethyl-3-piperidyl-propanol ester.

Family Applications After (3)

Application Number Title Priority Date Filing Date
CH174279D CH174279A (en) 1932-03-22 1933-02-16 Process for the preparation of phenylbromoallylacetic 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
CH174279A (en) 1934-12-31
CH174280A (en) 1934-12-31
CH174912A (en) 1935-01-31
CH168876A (en) 1934-04-30
CH174281A (en) 1934-12-31
CH174282A (en) 1934-12-31
CH174278A (en) 1934-12-31

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