CH293297A - Process for the preparation of a new ester. - Google Patents

Process for the preparation of a new ester.

Info

Publication number
CH293297A
CH293297A CH293297DA CH293297A CH 293297 A CH293297 A CH 293297A CH 293297D A CH293297D A CH 293297DA CH 293297 A CH293297 A CH 293297A
Authority
CH
Switzerland
Prior art keywords
pregnen
diketo
preparation
new ester
formula
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH293297A publication Critical patent/CH293297A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J5/00Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J75/00Processes for the preparation of steroids in general

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

      Verfahren    zur Herstellung     eines    neuen Esters.    Die vorliegende Erfindung betrifft ein  Verfahren zur Herstellung des     Trimethylace-          tats    von     J)esoxycorticosteron        (d4-3,20-Diketo-          21-oxy--pregnen).     



  Der neue Ester     wird    erhalten, wenn man  ein 1 4-3,     20-Diketo-pregnen    der Formel  
EMI0001.0010     
    mit einer Verbindung der Formel       (CH3)3C-CC-Y     umsetzt, wobei X und Y bei der Reaktion sich  mit Ausnahme eines in einem von ihnen ent  haltenen Sauerstoffatoms abspaltende Reste  bedeuten. Das     Verfahrensprodukt,    das     Desoxy-          corticosteron-trimethylacetat        (44-3,20-Diketo-          21-trimethylacetoxy-pregnen)    vom F. = 199  bis 200  ist neu. Es soll als Heilmittel verwen  det werden.  



  Das     d4-3,20-Diketo-21-trimethylacetoxy-          pregnen    besitzt einen wesentlich tieferen       Schwellenwert    und ist länger wirksam als das  als Heilmittel bekannte d     4-3,20-Diketo-21-acet-          i        oxy-pregnen.    Es ist aber auch zum Beispiel  dem lange wirkenden     44-3,20-Diketo-21-ben-          zoyloxy-pregnen    deutlich überlegen, indem es  einen tieferen Schwellenwert aufweist.  



  In den Ausgangsstoffen der oben angege-         benen    Formel kann X zum Beispiel eine     Oxy-          gruppe.    sein, die bei der Umsetzung mit     Tri-          methylessigsäure    oder einem     reaktionsfähigen     Derivat davon, wie einem     Halogenid,    einem  Ester oder dem     Anhydrid,    in An- oder Ab  wesenheit eines Kondensationsmittels die     Tri-          methylacetoxygruppe    ergibt.

   Ferner kann der  genannte     Substituent    in     21-Stellung    eine     ver-          esterte        Oxygruppe,    z. B.     ein.    Halogenatom,  darstellen, die bei der Behandlung mit     Tri-          methylessigsäure    oder einem     Salz    davon die       Trimethylacetoxygruppe    liefert.  



  <I>Beispiel 1:</I>  Zu     einer    Lösung von 9,5     Gewiehtsteilen          Desoxycorticosteron    in 20     Volumteilen        Pyri-          din    gibt man unter Rühren und     Eiskühhmg     8,5     Volumteile        Trimethylacetylchlorid.    Die Re  aktionslösung wird während 15 Stunden bei  -10  C stehengelassen und dann unter     Eis-          kühhuig    mit Eis     und    Wasser versetzt.

   Das aus  gefällte     Desoxycorticosteron-trimethylacetat     der Formel  
EMI0001.0058     
    wird     abfiltriert    und mit Wasser gewaschen.  Nach     Umkristallisieren    aus einem Gemisch von  Benzol und     Isopropyläther    schmilzt es bei 199  bis 200  C,     [a]    D =+ 176  (e=1,035 in Chloro  form).      <I>Beispiel 2:</I>  0,995 Gewichtsteil d     4-3,20-Diketo        21-brom-          pregnen    wird in 50     Volumteilen    trockenem       Aeeton    gelöst.

   Nach Zugabe von 1 Gewichts  teil fein pulverisiertem     Natriumtrimethylaee-          tat    kocht man die     Mischung    10 Stunden unter       Rüeh,-fluss.    Dann wird mit Wasser, Äther und  Chloroform versetzt. Den Rückstand der mit  Wasser     gewaschenen,    getrockneten und     einge-          dampften        organischen        Lösung    kristallisiert  man aus einem Gemisch von Chloroform und       Isopropyläther    um.

   Das so erhaltene     Tri-          methylacetat    des     Desoxycortieosterons    schmilzt  bei 199 bis 2000.



      Process for the preparation of a new ester. The present invention relates to a process for the production of the trimethyl acetate of J) esoxycorticosterone (d4-3,20-diketo-21-oxy - pregnen).



  The new ester is obtained when a 1 4-3, 20-diketo-pregnen of the formula
EMI0001.0010
    with a compound of the formula (CH3) 3C-CC-Y, where X and Y are radicals which split off during the reaction with the exception of one of them contained oxygen atom. The product of the process, deoxycorticosterone-trimethylacetate (44-3,20-diketo-21-trimethylacetoxy-pregnen) with a temperature of 199 to 200 is new. It is intended to be used as a remedy.



  The d4-3,20-diketo-21-trimethylacetoxy-pregnen has a significantly lower threshold value and is longer effective than the d 4-3,20-diketo-21-acetoxy-pregnen known as a remedy. But it is also clearly superior to the long-acting 44-3,20-diketo-21-benzoyloxy-pregnen, for example, because it has a lower threshold value.



  In the starting materials of the formula given above, X can, for example, be an oxy group. be which, when reacted with trimethyl acetic acid or a reactive derivative thereof, such as a halide, an ester or the anhydride, in the presence or absence of a condensing agent, gives the trimethylacetoxy group.

   Furthermore, said substituent in the 21-position can be an esterified oxy group, e.g. B. a. Halogen atom, which on treatment with trimethyl acetic acid or a salt thereof yields the trimethylacetoxy group.



  <I> Example 1: </I> To a solution of 9.5 parts by weight of deoxycorticosterone in 20 parts by volume of pyridine, 8.5 parts by volume of trimethylacetyl chloride are added with stirring and with ice cooling. The reaction solution is left to stand for 15 hours at -10 ° C. and then ice and water are added under ice-cooling.

   The precipitated deoxycorticosterone trimethylacetate of the formula
EMI0001.0058
    is filtered off and washed with water. After recrystallization from a mixture of benzene and isopropyl ether, it melts at 199 to 200 C, [a] D = + 176 (e = 1.035 in chloro form). Example 2: 0.995 part by weight of d 4-3,20-diketo 21-bromine-pregnen is dissolved in 50 parts by volume of dry acetone.

   After adding 1 part by weight of finely powdered sodium trimethylaeate, the mixture is boiled for 10 hours under agitation. Then water, ether and chloroform are added. The residue of the organic solution, washed with water, dried and evaporated, is recrystallized from a mixture of chloroform and isopropyl ether.

   The trimethyl acetate of deoxycortieosterone obtained in this way melts at 199 to 2000.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuer, Esters, dadurch gekennzeichnet, class man ein J-1-3,20-Diketo-pregnen der Formel EMI0002.0025 mit einer Verbindung der Formel (CHa)aC-CO-Y umsetzt, wobei X und F bei der Reaktion sich mit Ausnahme eines in einem von ihnen ent haltenen Sauerstoffatoms abspaltende Reste bedeuten. PATENT CLAIM: Process for the production of a new ester, characterized in that one class is a J-1-3,20-diketo-pregnen of the formula EMI0002.0025 with a compound of the formula (CHa) aC-CO-Y, where X and F are radicals which split off during the reaction with the exception of an oxygen atom contained in one of them. Das Verfahrensprodukt, das Desoxy- eorticosteron-trimetlrylaeetat (A4-3,20-Diketo- 21-trimethy laeetoxy-pregnen) von F. 199 bis 200 , ist neu. The product of the process, deoxy-eorticosterone-trimetlrylaeetat (A4-3,20-diketo-21-trimethylaeetoxy-pregnen) from F. 199 to 200, is new.
CH293297D 1950-03-24 1950-03-24 Process for the preparation of a new ester. CH293297A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH293297T 1950-03-24

Publications (1)

Publication Number Publication Date
CH293297A true CH293297A (en) 1953-09-15

Family

ID=4488117

Family Applications (1)

Application Number Title Priority Date Filing Date
CH293297D CH293297A (en) 1950-03-24 1950-03-24 Process for the preparation of a new ester.

Country Status (1)

Country Link
CH (1) CH293297A (en)

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