CH157188A - Process for the preparation of optically active 1-1-m-oxyphenyl-2-methylaminopropan-1-ol. - Google Patents
Process for the preparation of optically active 1-1-m-oxyphenyl-2-methylaminopropan-1-ol.Info
- Publication number
- CH157188A CH157188A CH157188DA CH157188A CH 157188 A CH157188 A CH 157188A CH 157188D A CH157188D A CH 157188DA CH 157188 A CH157188 A CH 157188A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxyphenyl
- methylaminopropan
- hydrogen
- preparation
- optically active
- Prior art date
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung von optisch aktivem 1-1-m- gyphenyl-2-methylamino- propan-l-ol. Es wurde gefunden, dass man durch Re duktion von optisch aktiven 1-Oxyphenyl-2- ketoalkoholen-(1) bezw. 1-Acyloxyphenyl-2- ketoalkoholen-(1), bezw.1-Arylmethogyphenyl- 2-ketoalkoholen-(1)
in Gegenwart von Am moniak oder primären oder sekundären Aminen und eventuelle nachträgliche Abspaltung der Acyl- bezw. Arylmethylreste aus den so er haltenen Verbindungen zu den therapeutisch wertvollen 1-Oxyphenyl-2-aminoalkoholen-(1) gelangt. Führt man beispielsweise die Re duktion mit Wasserstoff und Edelmetall katalysatoren aus, so verwendet man das Ammoniak oder die Amine in Form der freien Basen. Bei Ausführung des Verfahrens mit Hilfe von Katalysatoren der Nickel gruppe verwendet man die Basen in Form ihrer Salze.
Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Darstellung von 1-1-m- Oxyphenyl-2-methylaminopropan-l-ol, welches dadurch gekennzeichnet ist, dass man 1-m- Oxyphenylacetylkarbinol in Gegenwart von Verbindungen, welche die Gruppe -NH. CH3 enthalten, mit Wasserstoff in Gegenwart von Edelmetallkatalysatoren behandelt.
Das neue Verfahrensprodukt bildet ein aus Methylalkohol unter Zusatz von Äther umkristallisierbares Chlorhydrat, das bei 212 bis 213 o C schmilzt und eine spezifische Drehung [a] 'D' = - 26,7 o hat. Das Produkt besitzt ephedrinähnliche Wirkung und kann entsprechende Verwendung in der Therapie finden.
<I>Beispiele:</I> 1. 8 gr 1-m-Oxyphenylacetylkarbinol wer den in 7,5 gr 20 o/oiger alkoholischer Methyl- aminlösung aufgelöst, mit 50 eins absolutem Alkohol verdünnt und mit Palladium und Wasserstoff hydriert. Nach Aufnahme der berechneten Menge Wasserstoff wird vom Katalysator abgesaugt und der überschüssige Alkohol im Vakuum entfernt. Der verblei bende Rückstand wird mit alkoholischer Salzsäure neutralisiert, wobei nach kurzer Zeit das Chlorhydrat auskristallisiert.
Das 1-1-m-Oxyphenyl - 2 - methylaminopropan -1-ol- chlorhydrat wird aus Methanol unter Zusatz von Äther umkristallisiert. Die Verbindung schmilzt bei 212-213 . Spezifische Drehung [a] 'D' = - 26,7 .
2. 16,6 gr -1-m-Oxyphenylacetylkarbinol und 12,5 gr Benzylmethylamin werden in 125 cm3 Alkohol gelöst und mit Palladium bei gewöhnlicher Temperatur hydriert. Nach beendigter Wasserstoffaufnahme wird nach Entfernung des Katalysators der Alkohol im Vakuum abdestilliert. Der Rückstand wird in Wasser aufgenommen und der unlösliche Teil in Äther gelöst. Nachdem der in Wasser lösliche Teil mit Salzsäure neutralisiert ist, wird im Vakuum bis zur Trockne einge dampft.
Das auf diese Weise entstandene 1-1-m-Oxyphenyl - 2 - methylaminopropan -1-ol- chlorhydrat hat dieselben Eigenschaften wie das nach Beispiel 1 hergestellte.
Process for the preparation of optically active 1-1-m-gyphenyl-2-methylamino-propan-1-ol. It has been found that by reducing optically active 1-oxyphenyl-2-ketoalkoholen- (1) or. 1-Acyloxyphenyl-2- ketoalkoholen- (1), or 1-Arylmethogyphenyl- 2-ketoalkoholen- (1)
in the presence of Am moniak or primary or secondary amines and any subsequent cleavage of the acyl or. Arylmethyl radicals from the compounds obtained in this way lead to the therapeutically valuable 1-oxyphenyl-2-aminoalkoholen- (1). For example, if the reduction is carried out with hydrogen and noble metal catalysts, ammonia or amines in the form of the free bases are used. When carrying out the process with the aid of catalysts from the nickel group, the bases are used in the form of their salts.
The present invention relates to a process for the preparation of 1-1-m-oxyphenyl-2-methylaminopropan-l-ol, which is characterized in that 1-m-oxyphenylacetylcarbinol is added in the presence of compounds which form the -NH. Containing CH3, treated with hydrogen in the presence of noble metal catalysts.
The new process product forms a hydrochloride which can be recrystallized from methyl alcohol with the addition of ether, which melts at 212 to 213 o C and has a specific rotation [a] 'D' = -26.7 o. The product has an ephedrine-like effect and can be used accordingly in therapy.
<I> Examples: </I> 1. 8 g of 1-m-oxyphenylacetylcarbinol are dissolved in 7.5 g of 20% alcoholic methylamine solution, diluted with 50% alcohol and hydrogenated with palladium and hydrogen. After the calculated amount of hydrogen has been taken up, the catalyst is suctioned off and the excess alcohol is removed in vacuo. The remaining residue is neutralized with alcoholic hydrochloric acid, and the hydrochloride crystallizes out after a short time.
The 1-1-m-oxyphenyl-2-methylaminopropan -1-ol chlorohydrate is recrystallized from methanol with the addition of ether. The compound melts at 212-213. Specific rotation [a] 'D' = - 26.7.
2. 16.6 g -1-m-oxyphenylacetylcarbinol and 12.5 g benzylmethylamine are dissolved in 125 cm3 of alcohol and hydrogenated with palladium at ordinary temperature. After the uptake of hydrogen has ended and the catalyst has been removed, the alcohol is distilled off in vacuo. The residue is taken up in water and the insoluble part is dissolved in ether. After the water-soluble part has been neutralized with hydrochloric acid, it is evaporated to dryness in a vacuum.
The 1-1-m-oxyphenyl-2-methylaminopropan-1-ol chlorohydrate produced in this way has the same properties as that prepared according to Example 1.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE157188X | 1930-09-08 | ||
CH157188T | 1931-09-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH157188A true CH157188A (en) | 1932-09-15 |
Family
ID=25716904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH157188D CH157188A (en) | 1930-09-08 | 1931-09-07 | Process for the preparation of optically active 1-1-m-oxyphenyl-2-methylaminopropan-1-ol. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH157188A (en) |
-
1931
- 1931-09-07 CH CH157188D patent/CH157188A/en unknown
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