CH333082A - Process for the preparation of 21-acetoxy-pregnane-3,20-dione - Google Patents

Process for the preparation of 21-acetoxy-pregnane-3,20-dione

Info

Publication number
CH333082A
CH333082A CH333082DA CH333082A CH 333082 A CH333082 A CH 333082A CH 333082D A CH333082D A CH 333082DA CH 333082 A CH333082 A CH 333082A
Authority
CH
Switzerland
Prior art keywords
dione
pregnan
pregnane
acetoxy
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Gustav Dr Ehrhart
Schmidt-Thome Dr Prof
Heinrich Dr Ruschig
Werner Dr Fritsch
Werner Dr Haede
Original Assignee
Hoechst Ag
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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH333082A publication Critical patent/CH333082A/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)
  • Steroid Compounds (AREA)

Description

  

      Verfahren        zur        Herstellung    von     21-Acetogy-pregnan-3,20-dion       Gegenstand des Hauptpatentes ist ein  Verfahren zur Herstellung von     Desoxy-          corticosteronacetat,    das dadurch gekennzeich  net ist, dass man Progesteron in Gegenwart  eines     Natriumalkoholates    mit einem     Oxalsäure-          diester    in     21-Stellung    kondensiert, auf das  erhaltene Progesteron     -21-oxalesternatriumen-          olat    Jod einwirken lässt,

   das     Jodierungspro-          dukt    einer Säurespaltung unterwirft und das  gewonnene     21-Jod-progesteron    mit     Kalium-          acetat    umsetzt.  



  Gegenstand der vorliegenden     Erfindung     ist. ein Verfahren zur     Herstellung    von     21-          Aeetoxy-pregnan-    oder     -allopregnan-3,20-diori,     das dadurch gekennzeichnet ist, dass man       Pregnan-    oder     Allopregnan-3,20-dion    in     Ge-          genwart.    eines     Natriumalkoholat.es    mit.

       Oxal-          säurediäthylester    in     21-Stellung    kondensiert,  auf das erhaltene     Pregnan-    oder     Allopregnan-          3,20-dion-21-oxaloester-natriumenolat    Jod ein  wirken lässt, das     Jodierungsprodukt    einer  Säurespaltung unterwirft und die erhaltene       21-Jodverbindung    mit     Kaliumacetat    umsetzt.  



  Das so erhältliche     21-Acetoxy-pregnan-          3,20-dion    ist eine beispielsweise aus einer Ar  beit von T.     Reichstein,        Helvetica        Chimica    Acta  23 (1940), Seite 665, bekannte Verbindung  und stellt ein wertvolles Zwischenprodukt zur  Herstellung pharmazeutisch wertvoller Ver-         bindungen,        insbesondere    von     Nebennieren-          rindenhormonen,    dar.  



       Beispiel          1,1.3        cm3        3,44n-methanolische        Natrium-          methylatlösung    werden mit 8     cm3    Benzol ver  setzt, unter Stickstoff bis zu einem Kristall  brei eingeengt und nach Zugabe von 0,73     cm3          Oxalsäure-diäthylester    gerührt, bis Lösung  eingetreten ist. Dazu wird auf einmal eine  Lösung von 1,05 g     Pregnan-3,20-dion    in einem  Gemisch von 1,7     cm3    Benzol und 1,7     cm3     Äther zugefügt.  



  Nach 4stündigem Rühren bei 30      in    Stick  stoffatmosphäre werden 30     cm3    Äther zuge  setzt     und    der ausgefallene Niederschlag des       Oxalesterenolats    scharf abgesaugt. Der     Filter-          rückstand        wird    gut mit Äther gewaschen und  bei 40  C im     Vakuiun    getrocknet. Ausbeute  1,48 g.  



  Das Rohprodukt wird bei -20  in 18     cm3     Methanol suspendiert und mit einer Lösung  von 0,73 g Jod in 18     cms    absolutem Methanol  versetzt. Nach 20 Minuten werden 0,9     cm3     einer     3,44n-Natriummethylatlösung    zugefügt  und nach weiterem 20minutigen Rühren bei  -5  eine Lösung von 12 g Kochsalz in 130     cm3     Wasser zufliessen gelassen und der entstan  dene Niederschlag nach dem Stehen über      Nacht bei 0  abgesaugt, mit wenig Wasser ge  waschen und mit einer Mischung aus 2,3 g     Ka-          lzuma.ceta.t,,    27,6     cm3        Wasser,        1,253,

  @cm3    Eisessig  und 109     cm3    Aceton 5 Stunden unter R.ück  fluss gekocht.  



  Nach dem Abdampfen des Acetons im Va  kuum wird der     Rückstand    mit Wasser ge  waschen, mit, Äther: Benzol<B>(1:</B> 1) extrahiert,  im Vakuum zur Trockne eingedampft und in       Benzol/Petrolätherlösung   <B>(3:2)</B> an einer Säule  von saurem Aluminiumoxyd     chromatogra-          phiert.    Die mit     Benzol/Petroläther    (3:

  2)       eluierte    Fraktion ergibt nach dem Eindamp  fen und     Umkristallisieren    aus Äther das     21-          Acetoxy-pregnan-3,20-dion    vom Schmelzpunkt  149-151      (korr.).    Auf die gleiche Weise er-    hält man aus     Allopregnandion-(3,20)    das     21-          Acetoxy-allo-pregnan-3,20-dion.  



      Process for the production of 21-Acetogy-pregnan-3,20-dione The subject of the main patent is a process for the production of deoxycorticosterone acetate, which is characterized in that progesterone in the presence of a sodium alcoholate is mixed with an oxalic acid diester in the 21-position condenses, allows iodine to act on the progesterone -21-oxalester sodium enolate obtained,

   subjects the iodination product to acid cleavage and converts the 21-iodine-progesterone obtained with potassium acetate.



  The subject of the present invention is. a process for the preparation of 21-ethoxy-pregnan-or -allopregnan-3,20-diori, which is characterized in that pregnan-or allopregnan-3,20-dione is present. of a sodium alcoholate with.

       Oxalic acid diethyl ester is condensed in the 21-position, iodine is allowed to act on the resulting pregnan or allopregnan-3,20-dione-21-oxaloester sodium enolate, the iodination product is subjected to acid cleavage and the 21-iodine compound obtained is converted with potassium acetate.



  The 21-acetoxy-pregnan- 3,20-dione obtainable in this way is a compound known, for example, from a work by T. Reichstein, Helvetica Chimica Acta 23 (1940), page 665, and is a valuable intermediate for the production of pharmaceutically valuable compounds bonds, in particular of adrenal cortical hormones.



       Example 1.1.3 cm3 of 3.44n-methanolic sodium methoxide solution are mixed with 8 cm3 of benzene, concentrated under nitrogen to a crystal pulp and, after adding 0.73 cm3 of diethyl oxalate, stirred until solution has occurred. To this end, a solution of 1.05 g of pregnane-3,20-dione in a mixture of 1.7 cm3 of benzene and 1.7 cm3 of ether is added all at once.



  After stirring for 4 hours at 30 in a nitrogen atmosphere, 30 cm3 of ether are added and the precipitate of the oxalester enolate which has precipitated is sharply suctioned off. The filter residue is washed well with ether and dried at 40 ° C. in a vacuum. Yield 1.48g.



  The crude product is suspended in 18 cm 3 of methanol at -20 and a solution of 0.73 g of iodine in 18 cm of absolute methanol is added. After 20 minutes, 0.9 cm3 of a 3.44N sodium methylate solution are added and, after stirring for a further 20 minutes at -5, a solution of 12 g of sodium chloride in 130 cm3 of water is allowed to flow in and the resulting precipitate is filtered off with suction after standing overnight at 0 Wash a little water and with a mixture of 2.3 g Kalzuma.ceta.t ,, 27.6 cm3 water, 1.253,

  @ cm3 glacial acetic acid and 109 cm3 acetone boiled under reflux for 5 hours.



  After the acetone has been evaporated off in vacuo, the residue is washed with water, extracted with ether: benzene (1: 1), evaporated to dryness in vacuo and dissolved in benzene / petroleum ether solution (3 : 2) </B> Chromatographed on a column of acidic aluminum oxide. Those with benzene / petroleum ether (3:

  2) eluted fraction yields after evaporation and recrystallization from ether the 21-acetoxy-pregnane-3,20-dione of melting point 149-151 (corr.). In the same way, 21-acetoxy-allo-pregnane-3,20-dione is obtained from allopregnandione- (3,20).

 

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung von 21-Acetoxy- pregnan- oder -allopregnan-3,20-dion, dadurch gekennzeichnet, dass man Pregnan- oder Allo- pregnan-3,20-dion in Gegenwart, eines Na- triumalkoholates mit Oxalsäurediäthylester in 21-Stellung kondensiert, auf das erhaltene Pregnan- oder Allopregnan-3,20-dion-21-oxalo- ester-natriumenolat Jod einwirken lässt, PATENT CLAIM A process for the preparation of 21-acetoxy-pregnan-3,20-dione or -allopregnan-3,20-dione, characterized in that pregnan-3,20-dione or allo-pregnan-3,20-dione in the presence of a sodium alcoholate with diethyl oxalate in 21- Condensed position, the pregnane or allopregnane 3,20-dione-21-oxaloester sodium enolate obtained allows iodine to act, das Jodierungsprodukt einer Säurespaltung unter wirft und die erhaltene 21-Jodverbindung mit Kaliumacetat umsetzt. the iodination product is subjected to acid cleavage and the 21-iodine compound obtained is reacted with potassium acetate.
CH333082D 1951-09-28 1952-09-27 Process for the preparation of 21-acetoxy-pregnane-3,20-dione CH333082A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE333082X 1951-09-28
CH310364T 1952-09-27

Publications (1)

Publication Number Publication Date
CH333082A true CH333082A (en) 1958-09-30

Family

ID=25735700

Family Applications (1)

Application Number Title Priority Date Filing Date
CH333082D CH333082A (en) 1951-09-28 1952-09-27 Process for the preparation of 21-acetoxy-pregnane-3,20-dione

Country Status (1)

Country Link
CH (1) CH333082A (en)

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