CH189063A - Process for the preparation of a stereoisomeric alcohol. - Google Patents
Process for the preparation of a stereoisomeric alcohol.Info
- Publication number
- CH189063A CH189063A CH189063DA CH189063A CH 189063 A CH189063 A CH 189063A CH 189063D A CH189063D A CH 189063DA CH 189063 A CH189063 A CH 189063A
- Authority
- CH
- Switzerland
- Prior art keywords
- process according
- catalysts
- works
- stereoisomeric
- preparation
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J1/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane
- C07J1/0003—Androstane derivatives
- C07J1/0018—Androstane derivatives substituted in position 17 beta, not substituted in position 17 alfa
- C07J1/0022—Androstane derivatives substituted in position 17 beta, not substituted in position 17 alfa the substituent being an OH group free esterified or etherified
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Steroid Compounds (AREA)
Description
verfahren zur Herstellunb eines stereoisomeren Alkohols. Im Patent Nr. 1.82ss9.1 ist die Herstel lung mehrkerniger Ringketone aus Sterinen und Gallensäuren beschrieben. Es wurde nun gefunden, dass man durch Hydrierung sol cher Uingketone jeweils zwei stereoisomere Alkohole erhalten kann.
Dabei ist man durch passende Wahl der Reaktionsbedin gung en,insbesondere durch ,saure oder neutrale bezw. alkalische Einstellung des Mediums, in dem reduziert wird, oft in der Lage, vor zugsweise oder ausschliesslich den einen oder andern der jeweils möglichen beiden stereo- isomeren Alkohole zu gewinnen. Letztere leiten sich von den zugrunde liegenden Ke- tonen derart ab,
dass die bei der Hydrierung der Ketongruppe entstehende Hydroxyl- gruppe im einen Falle auf der einen Seite des Ringsystems und im andern Falle auf seiner entgegengesetzten Seite steht.
Als Ausgangsprodukte können sowohl ,die nachdem in obiger Patentschrift ange gebenen Verfahren hergestellten Oxykecone, wie auch ihre Derivate z. B. ihre Ester, Äther oder dergleichen dienen. Die -#Terwen- dung von Oxyketonen führt zu stereoisome- ren Diolen. Die Reduktion wird zweckmässig mit aktiviertem Wasserstoff ausgeführt, so z.
B. ,durch Hydrierung mit Wasserstoff in Gegenwart von Katalysatoren der Platin- gruppe, von Nickel, Kobalt, von Kataly- satorgamisehen und dergleichen, oder aueh mit naszierendem Wasserstoff, z. B. Natrium in Alkoholen.
Als Lösungsmittel für die katalyti,sehe Hydrierung lassen sieh Eis- essig, Alkohole wie Methyl- oder Äthyl alkohol, Äther usw. verwenden.
Gegenstand des vorliegenden Patentes bildet ein Verfahren zur Herstellung eines stereoisomeren Alkohols, welches dadurch gekennzeichnet ist, dass man Andro@steron- acetat mit Reduktionsmitteln behandelt und das entstandene 3-Epi-acetoxy-androstanol- - (17) vorn F. 183 bis 18:
3,5 isoliert. Das so gewonnene Diol-3-monoacetat kann aus Me thanol umkristallisiert werden.<B>Ei</B> s zeichnet sieh durch seine physiologische Wirkung aus und soll therapeutische Verwendung finden.
<I>Beispiel:</I> 7? mg Androsteronacetat werden in <I>i</I> ';.5 ein' Alkohol unter Zusatz von 1 Tropfen konzentrierter S'chl#vefelsäure, sowie von Platinoxyd in Gegenwart von Wasserstoff besplrüttelt. Nach der Aufnahme von 1 Mol Wasserstoff wird- vom Katalysator abge trennt,
mit Wasser und Äther versetzt und der Ätheranteil getrocknet. Durch Um- kri.stallisieren des Ätllerrüekstar_des aus Me thanol gewinnt man das Diolmonoacetat der Formel C -,A",0@ und dem F. 133 bis 183,5 " in prachtvollen Lamellen.
process for the preparation of a stereoisomeric alcohol. The production of polynuclear ring ketones from sterols and bile acids is described in patent no. 1.82ss9.1. It has now been found that two stereoisomeric alcohols can be obtained by hydrogenation of such urine ketones.
One is through appropriate choice of the reaction conditions, in particular through, acidic or neutral respectively. The alkaline setting of the medium in which the reduction is carried out is often able to obtain, preferably or exclusively, one or the other of the two possible stereoisomeric alcohols. The latter are derived from the underlying ketons in such a way that
that the hydroxyl group formed during the hydrogenation of the ketone group is in one case on one side of the ring system and in the other on its opposite side.
As starting products, both the oxykecones prepared after the above patent specification process, as well as their derivatives z. B. serve their esters, ethers or the like. The - # use of oxyketones leads to stereoisomeric diols. The reduction is conveniently carried out with activated hydrogen, e.g.
B. by hydrogenation with hydrogen in the presence of catalysts of the platinum group, of nickel, cobalt, of Kataly- satorgamisehen and the like, or also with nascent hydrogen, z. B. Sodium in alcohols.
As a solvent for the catalytic hydrogenation, glacial acetic acid, alcohols such as methyl or ethyl alcohol, ether, etc. can be used.
The subject of the present patent is a process for the production of a stereoisomeric alcohol, which is characterized in that andro @ sterone acetate is treated with reducing agents and the resulting 3-epi-acetoxy-androstanol- (17) from F. 183 to 18:
3.5 insulated. The diol-3-monoacetate obtained in this way can be recrystallized from methanol. <B> Egg </B> s is characterized by its physiological effect and is intended to be used therapeutically.
<I> Example: </I> 7? mg androsterone acetate are shaken in <I> i </I> '; .5 an' alcohol with the addition of 1 drop of concentrated sulphonic acid and platinum oxide in the presence of hydrogen. After the uptake of 1 mol of hydrogen is separated from the catalyst,
mixed with water and ether and the ether portion dried. The diol monoacetate of the formula C-, A ", 0 @ and the F. 133 to 183.5" is obtained in splendid lamellas by recrystallizing the Ätllerrückstar_des from methanol.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH189063T | 1934-10-31 | ||
CH184420T | 1934-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH189063A true CH189063A (en) | 1937-01-31 |
Family
ID=25721023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH189063D CH189063A (en) | 1934-10-31 | 1934-10-31 | Process for the preparation of a stereoisomeric alcohol. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH189063A (en) |
-
1934
- 1934-10-31 CH CH189063D patent/CH189063A/en unknown
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