CH284986A - Process for the preparation of a derivative of pregnane-3,11,20-trione. - Google Patents

Process for the preparation of a derivative of pregnane-3,11,20-trione.

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Publication number
CH284986A
CH284986A CH284986DA CH284986A CH 284986 A CH284986 A CH 284986A CH 284986D A CH284986D A CH 284986DA CH 284986 A CH284986 A CH 284986A
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CH
Switzerland
Prior art keywords
trione
treatment
pregnane
acetic acid
glacial acetic
Prior art date
Application number
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German (de)
Inventor
Nv Organon
Original Assignee
Nv Organon
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 Nv Organon filed Critical Nv Organon
Publication of CH284986A publication Critical patent/CH284986A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J9/00Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of more than two carbon atoms, e.g. cholane, cholestane, coprostane
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J3/00Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by one carbon atom
    • 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
    • C07J7/00Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms
    • 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 Derivates von     Pregnan-3,11,20-trion.            (;egenstand    der Erfindung ist ein Verfah  ren zur     I1erstellung    von     21-Acetoxy-pregnan-          3,11,20-triön,    einem wichtigen Zwischenpro  dukt in der Synthese von Hormonen der       Nebennierenrinde.     



  Das erfindungsgemässe Verfahren ist da  durch gekennzeichnet, dass     dll,lz-21-Acetoxy-          pregnen-3,20-dion    durch Behandlung mit.       Brolnacetamid    in das     Halogenhydrin    der  Formel  
EMI0001.0011     
    übergeführt, letzteres durch Behandlung  mit einem oxydierenden Mittel in     12-Brom-          21-acetoxy-pregnan-3,11,20-trion    umgewandelt  und aus diesem durch Behandlung mit redu  zierenden Mitteln das Halogen entfernt wird.  



  Das erhaltene     21-Acetoxy-pregnan-3,11,20-          trion    ist eine bisher in der Literatur nicht be  schriebene Verbindung vom     Schmp.    152 bis  154  C und der spezifischen Drehung [al<B>l'</B>  _ + 107  (Aceton).  



  Als Oxydationsmittel wird vorzugsweise       Chromtrioxyd    in     Eisessig    verwendet. Die     Ent-          bromung    erfolgt vorzugsweise durch Behand  lung mit Zinkstaub in Eisessig.

   Das Ausgangs  material kann wie folgt hergestellt. werden:         ,1i,12-3    -     Oxy    -     ätio    -     cholensäure    -     methylester     wird verseift, das     Verseifungsprodukt        acety-          liert,    das so erhaltene Produkt mit     Thionyl-          ehlorid    in das     S'äureehlorid    übergeführt und  letzteres mit einem     1J\berschuss    an ätherischer       Diazomethanlösung    behandelt.

   Das rohe     ace-          tylierte        Diazoketon    wird mit     methylalkoholi-          scher    Natronlauge bei Zimmertemperatur ver  seift und das erhaltene     Oxy-diazoketon    durch  Erhitzen mit Eisessig in     All,12-21-Acetoxy-          pregnen-3-ol-20-on    übergeführt.

   Dieses Zwi  schenprodukt wird in das     d".12-21-Ae.etoxy-          pregnen-3,20-dion    übergeführt, entweder  durch Kochen mit Benzol, Aceton und     Alumi-          niumphenolat    oder indem bei Zimmertem  peratur mit. der berechneten Menge     Chrom-          trioxyd    in Eisessig behandelt wird. Das Pro  dukt kann durch     Chromatographie    oder  durch     Umkristallisieren    aus Äther gereinigt  werden, doch können auch unscharf schmel  zende Präparate als Ausgangsmaterial für  das erfindungsgemässe Verfahren verwendet  werden.  



  <I>Beispiel:</I>  1. Teil     '11,1a_21-Acetoxy-pregnen-3,20-dion     wurde in 25 Teile Aceton aufgelöst, die Lö  sung mit 0,75 Teile     n-Bromacetamid    in 6 Tei  len. Wasser versetzt und das Ganze 1.6 Stun  den bei Zimmertemperatur stehengelassen.  Sodann wurden weitere 6 Teile Wasser zu  gesetzt, das Aceton im Vakuum entfernt und  der Rückstand mehrmals mit. Äther ausge  schüttelt. Die     Ätherlösung    wurde mit Wasser      und     Sodalösung    gewaschen, getrocknet und  eingedampft.  



  Das als kristalliner Rückstand erhaltene       Halogenhy    drin wurde in 18 Teilen reinstem  Eisessig aufgelöst, mit 18 Teilen ?     o/oiger          Chromtrioxydlösung    in Eisessig versetzt. und  das Ganze bei 18  C     stehengel.assen.    Nach  1.6 Stunden wurden nochmals etwa ? Teile       o/oioe        Chromtrioxydlösung        zugesetzt    und  dies so oft. wiederholt, bis nach 5stündigem  Stehen in einer Probe des Reaktionsgutes  noch freie Chromsäure nachweisbar war. Die  Lösung wurde im Vakuum bei 30  C Rad  temperatur auf ein kleines Volumen einge  engt, mit Wasser verdünnt und mit. Äther  ausgeschüttelt.

   Die Ätherlösung wurde mit  0,6 Teilen Zinkstaub und 0,5 Teilen wasser  freiem     Natriumaeetat    versetzt, unter Um  schwenken erhitzt und eingeengt, darauf wur  den 3 Teile Eisessig zugefügt und das Ganze  unter     öfterem    Umschwenken 15 Minuten auf  dem siedenden Wasserbad erhitzt. Das Reak  tionsgut wurde filtriert, mit Äther nachge  waschen, das Filtrat im Vakuum eingedampft,  der Rückstand mit Wasser versetzt und so  dann mit viel Äther ausgeschüttelt. Die Ä     ther-          lösung    wurde mit verdünnter Salzsäure,       Sodalösung    und Wasser gewaschen und über  Natriumsulfat getrocknet.

   Es wurde 0,9 bis  1,0 Teile eines     Rohproduktes    erhalten, wel  ches durch     Chromatographie    gereinigt wurde.  Insbesondere die mit absolutem Benzol     elii-          ierten    Anteile kristallisierten aus     Äther-          Petroläther    in     farblosen    Nadeln vom     Schmp.     1.52 bis     1541'    C.  



  Das Endprodukt zeigte die     spez.    Drehung       [al    D = + 107  (Aceton), entsprach der  Bruttoformel     C.?,HS205    des     21-Aeetoxy-preg-          nan-3,11,20-trion    und reduzierte alkalische         Silberdiaminlösung    bei Zimmertemperatur  rasch und stark.



  Process for the preparation of a derivative of pregnane-3,11,20-trione. The object of the invention is a process for the production of 21-acetoxy-pregnan- 3,11,20-triön, an important intermediate product in the synthesis of hormones of the adrenal cortex.



  The inventive method is characterized in that dll, lz-21-acetoxy-pregnen-3,20-dione by treatment with. Brolnacetamide into the halohydrin of the formula
EMI0001.0011
    converted, the latter converted by treatment with an oxidizing agent in 12-bromo-21-acetoxy-pregnane-3,11,20-trione and the halogen is removed from this by treatment with reducing agents.



  The 21-acetoxy-pregnane-3,11,20-trione obtained is a compound with a melting point of 152 to 154 C and a specific rotation [al <B> l '</B> _ + 107 which has not been described in the literature so far (Acetone).



  Chromium trioxide in glacial acetic acid is preferably used as the oxidizing agent. The bromination is preferably carried out by treatment with zinc dust in glacial acetic acid.

   The starting material can be produced as follows. are:, 1i, 12-3 - oxy - ethio - cholenic acid methyl ester is saponified, the saponification product is acetylated, the product thus obtained is converted into the acid chloride with thionyl chloride and the latter is treated with an excess of ethereal diazomethane solution .

   The crude acetylated diazoketone is saponified with methyl alcoholic sodium hydroxide solution at room temperature and the resulting oxydiazoketone is converted into 12-21-acetoxypregnen-3-ol-20-one by heating with glacial acetic acid.

   This intermediate product is converted into the d ".12-21-Ae.etoxy-pregnen-3,20-dione, either by boiling with benzene, acetone and aluminum phenolate or by adding the calculated amount of chromium trioxide at room temperature The product can be purified by chromatography or by recrystallization from ether, but indistinctly melting preparations can also be used as starting material for the process according to the invention.



  <I> Example: </I> 1st part '11, 1a_21-acetoxy-pregnen-3,20-dione was dissolved in 25 parts of acetone, the solution with 0.75 part of n-bromoacetamide in 6 parts. Water was added and the whole thing left to stand for 1.6 hours at room temperature. A further 6 parts of water were then added, the acetone was removed in vacuo and the residue was repeated several times. Ether shaken out. The ether solution was washed with water and soda solution, dried and evaporated.



  The halohydin obtained as a crystalline residue was dissolved in 18 parts of the purest glacial acetic acid, with 18 parts? o / o chromium trioxide solution is added to glacial acetic acid. and leave the whole thing at 18 C. After 1.6 hours were again about? Parts o / o chromium trioxide solution added and this as often. repeatedly until free chromic acid was still detectable in a sample of the reaction mixture after standing for 5 hours. The solution was concentrated to a small volume in vacuo at 30 C radian temperature, diluted with water and mixed with. Ether shaken out.

   The ether solution was mixed with 0.6 part of zinc dust and 0.5 part of anhydrous sodium acetate, heated while swirling and concentrated, then 3 parts of glacial acetic acid were added and the whole thing was heated on the boiling water bath for 15 minutes while swirling frequently. The reac tion material was filtered, washed nachge with ether, the filtrate evaporated in vacuo, the residue was mixed with water and then extracted with a lot of ether. The ether solution was washed with dilute hydrochloric acid, soda solution and water and dried over sodium sulfate.

   0.9 to 1.0 part of a crude product was obtained, which was purified by chromatography. In particular the fractions eliminated with absolute benzene crystallized from ether-petroleum ether in colorless needles with a melting point of 1.52 to 1541 ° C.



  The end product showed the spec. Rotation [al D = + 107 (acetone), corresponded to the gross formula C.?,HS205 of 21-ethoxy-preg-nan-3,11,20-trione and reduced alkaline silver diamine solution rapidly and strongly at room temperature.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Derivates von Pregnan-3,11.,20-trion, dadurch gekenn zeichnet, dass .1l,12- l-Aeetoxy-pregnen-3,20- dion durch Behandlung mit Bromacetamid in das Halogenhydrin der Formel EMI0002.0035 übergeführt, letzteres durch Behandlung mit einem oxydierenden Mittel in 12-Broni 21.- acetoxy-pregnan-3,11,20-trion umgewandelt und aus diesem durch Behandlung mit redu zierenden Mitteln das Halogen entfernt wird. Claim: Process for the preparation of a derivative of Pregnan-3,11., 20-trione, characterized in that .1l, 12- l-ethoxy-pregnen-3,20-dione by treatment with bromoacetamide into the halohydrin of the formula EMI0002.0035 converted, the latter converted by treatment with an oxidizing agent in 12-Broni 21.-acetoxy-pregnane-3,11,20-trione and the halogen is removed from this by treatment with reducing agents. Das erhaltene 21-Aeetoxy-pregnan-3,11,20- trion ist eine bisher in der Literatur nicht be schriebene Verbindung vom Schmp. 152 bis l.54 C und der spezifischen Drehung [a]D _ + 107 (Aceton). UNTERANSPRÜCHE 1. The 21-ethoxy-pregnane-3,11,20-trione obtained is a compound not previously described in the literature with a melting point of 152 to 1.54 C and a specific rotation [a] D _ + 107 (acetone). SUBCLAIMS 1. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass die Oxydation des Halogenhy drins durch Behandlung mit. Chrom- trioxyd in Eisessig erfol-t. \_'. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass die Entbromung des 12-Brom-21.-acetoxy-pregnan-3,11,20-trion durch Behandlung mit. Zinkstaub in Eisessig erfolgt. Method according to claim, characterized in that the oxidation of the Halogenhy drins by treatment with. Chromium trioxide takes place in glacial acetic acid. \ _ '. Method according to claim, characterized in that the debromination of the 12-bromo-21st-acetoxy-pregnane-3,11,20-trione by treatment with. Zinc dust is made in glacial acetic acid.
CH284986D 1942-10-08 1942-10-08 Process for the preparation of a derivative of pregnane-3,11,20-trione. CH284986A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH251117T 1942-10-08
CH284986T 1942-10-08

Publications (1)

Publication Number Publication Date
CH284986A true CH284986A (en) 1952-08-15

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CH284986D CH284986A (en) 1942-10-08 1942-10-08 Process for the preparation of a derivative of pregnane-3,11,20-trione.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782211A (en) * 1953-09-04 1957-02-19 Ciba Pharm Prod Inc Manufacture of dehydro compounds of the pregnane series
US3142690A (en) * 1956-01-25 1964-07-28 Merck & Co Inc 12alpha-halo-pregnenes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782211A (en) * 1953-09-04 1957-02-19 Ciba Pharm Prod Inc Manufacture of dehydro compounds of the pregnane series
US3142690A (en) * 1956-01-25 1964-07-28 Merck & Co Inc 12alpha-halo-pregnenes

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