DE913779C - Process for the preparation of an oxyphenyl-ethanolamine - Google Patents
Process for the preparation of an oxyphenyl-ethanolamineInfo
- Publication number
- DE913779C DE913779C DEL2525D DEL0002525D DE913779C DE 913779 C DE913779 C DE 913779C DE L2525 D DEL2525 D DE L2525D DE L0002525 D DEL0002525 D DE L0002525D DE 913779 C DE913779 C DE 913779C
- Authority
- DE
- Germany
- Prior art keywords
- oxyphenyl
- ethanolamine
- preparation
- oxy
- oxyphenylethanolamine
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
- C07C213/04—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reaction of ammonia or amines with olefin oxides or halohydrins
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
- C07C213/02—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions involving the formation of amino groups from compounds containing hydroxy groups or etherified or esterified hydroxy groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Oxyphenyl-äthanolamins Es ist bereits eine Reihe von Aminen vom Typus des Adrenalins bekannt, so z. B. das p-Oxyphenyläthanol-methylamin, das p-Oxyphenyl-äthanolamin sowie das m-Oxyphenyl-äthanol-methylamin. Die entsprechende Nor-Verbindung der letztgenannten Substanz, das m-Oxyphenyl-äthanolamin, wurde bisher in der Literatur noch nicht beschrieben. Gegenstand der vorliegenden Erfindung bildet ein Verfahren zur Herstellung dieses m-Oxyphenyl-äthanolamins, welches darin besteht, daß man m-Oxy-co-aminoacetophenon in an sich bekannter Weise, gegebenenfalls unter zeitweiser Blockierung der Oxy- bzw. Aminogruppe, mit Reduktionsmitteln behandelt.Process for the preparation of an oxyphenyl-ethanolamine It is already a number of amines of the adrenaline type are known, e.g. B. p-Oxyphenylethanol-methylamine, p-oxyphenyl-ethanolamine and m-oxyphenyl-ethanol-methylamine. The corresponding Nor-compound of the last-mentioned substance, the m-oxyphenyl-ethanolamine, was previously not yet described in the literature. Forms the subject of the present invention a process for the preparation of this m-oxyphenylethanolamine, which consists in that one m-oxy-co-aminoacetophenone in a manner known per se, optionally under temporary blocking of the oxy or amino group, treated with reducing agents.
Als Reduktionsmittel kommen solche in Frage, die geeignet sind, eine -CO-Gruppe in eine -C H O H-Gruppe überzuführen. Es sei hierbei verwiesen z. B. auf J. Houben, Die Methoden der organischen Chemie, III. Aufl., Bd. z, Kapitel über Reduktion, insbesondere S. 2q.5 ff. Besonders zweckmäßig sind die folgenden Reduktionsmittel: Wasserstoff in Gegenwart von edlen und unedlen Metallen, wie Palladium, Platin, Nickel, Cobalt, deren Gemische u. dgl.As the reducing agent, there are those that are suitable, a -CO group to be converted into a -C H O H group. It is referred here z. B. on J. Houben, The methods of organic chemistry, III. Ed., Vol. Z, chapter on Reduction, in particular p. 2q.5 ff. The following reducing agents are particularly useful: Hydrogen in the presence of noble and base metals such as palladium, platinum, Nickel, cobalt, their mixtures and the like.
Die erwähnte Blockierung der Oxy- bzw. Aminogruppe während der Reduktion kann z. B. durch Veresterung vorgenommen werden. Nach erfolgter Reduktion werden dann die Estergruppen verseift und so das freie m-Oxyphenyl-äthanolamin gewonnen. Statt der Veresterung kann natürlich die Blockierung auch auf andere Art erzielt werden. Man kann z. B. vom Benzyläther ausgehen und den Benzylrest nachträglich oder im Verlauf der Reduktion wieder abspalten. Das m-Oxyphenyl-äthanolamin soll therapeutische Verwendung finden. Gegenüber bereits bekannten Verbindungen ähnlicher Konstitution hat es den Vorzug der erheblich längeren Wirksamkeit. Zum Beispiel beträgt die gleich starke Blutdrucksteigerung am Kaninchen bei gleichen Versuchsbedingungen (intravenöse Applikation, I;'io letale Dosis) im Falle des p-Oxyphenyl-äthanol-methylamins g Minuten, des m-Oxyphenyl-äthanol-methylamins 5 bis 7 Minuten, wogegen diejenige des nach dem vorliegenden Verfahren erhältlichen m-Oxyphenyl-äthanolamins 27 Minuten dauert. Das ebenfalls bekannte p-Oxyphenyläthanolamin weist eine noch schwächere Blutdruckwirksamkeit als Tyramin auf (H e f f t e r , Handbuch der experimentellen Pharmakologie, I1;2, S. i288 ;19241), welches seinerseits schwächer wirkt als p-Oxyphenyl-äthanol-methylamin.The mentioned blocking of the oxy or amino group during the reduction can e.g. B. be made by esterification. After the reduction has taken place then the ester groups are saponified and the free m-oxyphenylethanolamine is obtained. Instead of the esterification, the blocking can of course also be achieved in another way will. You can z. B. proceed from the benzyl ether and subsequently add the benzyl residue or split off again in the course of the reduction. The m-oxyphenyl-ethanolamine should find therapeutic use. Compared to already known connections of a similar constitution, it has the advantage of being effective for a considerably longer period of time. To the Example is the equally strong increase in blood pressure in rabbits for the same Test conditions (intravenous administration, I; 'io lethal dose) in the case of p-oxyphenyl-ethanol-methylamine g minutes, the m-oxyphenyl-ethanol-methylamine 5 to 7 minutes, whereas the one of the m-oxyphenyl-ethanolamine obtainable by the present process 27 minutes take. The also known p-oxyphenylethanolamine has an even weaker one Blood pressure effectiveness than tyramine on (H e f t e r, Manual of the experimental Pharmacology, I1; 2, pp. I288; 19241), which in turn has a weaker effect than p-oxyphenyl-ethanol-methylamine.
Die Herstellung der neuen Verbindung wird durch die folgenden Beispiele erläutert. Beispiel i ioo Teile des Hydrochlorids des m-Oxy-(,)-aminoacetophenons vom F. 220 bis 222° (erhalten durch Bromieren von m-Acetoxy-acetophenon, Umsetzung des Bromketons mit Natriumjodid, Addition von Hexamethylen-tetramin an das jodid in einem indifferenten Lösungsmittel und Spaltung des Additionsproduktes in saurer Lösung) werden in wäßriger Lösung mit Wasserstoff in Gegenwart von 2 Teilen Palladiumkatalysator geschüttelt bis zur Aufnahme von 2 Atomen Wasserstoff. Hierauf wird vom Katalysator abfiltriert, das Filtrat im Vakuum eingedampft und der kristallinisch erstarrte und vollständig getrocknete Rückstand in absolutem Alkohol gelöst und mit trockenem Äther gefällt. Das so erhaltene Hydrochlorid des m-Oxyphenyl-äthanolamins bildet weiße Kristalle vom F. 159 bis 16o°. Beispiel 2 5o Teile m-Acetoxy-c)-acetaminoacetophenon (erhalten durch Acetylieren des im Beispiel i genannten m-Oxy-craminoacetophenons) werden in Essigester mit Wasserstoff in Gegenwart von 1o Teilen eines Nickelkatalysators im Autoklav unter Druck bei erhöhter Temperatur bis auf Aufnahme von 2 Atomen Wasserstoff hydriert. Hierauf wird vom Katalysator abfiltriert und das Lösungsmittel abgedampft. Aus dem Rückstand wird durch Umkristallisieren das m-Acetoxyphenyl-äthanolacetamin in reiner Form gewonnen.The preparation of the new compound is illustrated by the following examples explained. Example 100 parts of the hydrochloride of m-oxy - (,) - aminoacetophenone from 220 ° to 222 ° C. (obtained by bromination of m-acetoxy-acetophenone, conversion of bromine ketone with sodium iodide, addition of hexamethylene tetramine to the iodide in an inert solvent and cleavage of the addition product in acidic Solution) are in aqueous solution with hydrogen in the presence of 2 parts of palladium catalyst shaken until 2 atoms of hydrogen are absorbed. This is followed by the catalyst filtered off, the filtrate evaporated in vacuo and the crystalline solidified and completely dried residue dissolved in absolute alcohol and washed with dry Ether pleases. The m-oxyphenylethanolamine hydrochloride thus obtained forms white crystals from 159 to 16o °. Example 2 50 parts of m-acetoxy-c) -acetaminoacetophenone (obtained by acetylating the m-oxy-craminoacetophenone mentioned in example i) are in ethyl acetate with hydrogen in the presence of 1o parts of a nickel catalyst in the autoclave under pressure at an elevated temperature up to the absorption of 2 atoms of hydrogen hydrogenated. The catalyst is then filtered off and the solvent is evaporated off. The m-acetoxyphenylethanolacetamine is recrystallized from the residue obtained in pure form.
Durch Erwärmen dieser Verbindung z. B. mit verdünnter Salzsäure erhält man das m-Oxyphenyläthanol-acetamin, aus welchem bei weit.-rer Verseifung die im Beispiel i beschriebene Verbindung gewonnen wird.By heating this compound e.g. B. obtained with dilute hydrochloric acid one the m-Oxyphenyläthanol-acetamin, from which in far.-rer saponification the im Example i described compound is obtained.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR913779X | 1938-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE913779C true DE913779C (en) | 1954-08-09 |
Family
ID=9421943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL2525D Expired DE913779C (en) | 1938-09-14 | 1938-11-16 | Process for the preparation of an oxyphenyl-ethanolamine |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE913779C (en) |
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1938
- 1938-11-16 DE DEL2525D patent/DE913779C/en not_active Expired
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