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.Info
- 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
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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)
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)
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 |
-
1933
- 1933-02-16 CH CH174281D patent/CH174281A/en unknown
- 1933-02-16 CH CH174282D patent/CH174282A/en unknown
- 1933-02-16 CH CH174913D patent/CH174913A/en unknown
- 1933-02-16 CH CH174278D patent/CH174278A/en unknown
- 1933-02-16 CH CH174279D patent/CH174279A/en unknown
- 1933-02-16 CH CH174280D patent/CH174280A/en unknown
- 1933-02-16 CH CH168876D patent/CH168876A/en unknown
-
1934
- 1934-02-06 CH CH174912D patent/CH174912A/en unknown
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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