CH298333A - Process for the preparation of a 17-methylpregnene compound. - Google Patents

Process for the preparation of a 17-methylpregnene compound.

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Publication number
CH298333A
CH298333A CH298333DA CH298333A CH 298333 A CH298333 A CH 298333A CH 298333D A CH298333D A CH 298333DA CH 298333 A CH298333 A CH 298333A
Authority
CH
Switzerland
Prior art keywords
methyl
dioxo
compound
parts
methylpregnene
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 CH298333A publication Critical patent/CH298333A/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

  

  <B>Verfahren</B>     zur   <B>Herstellung</B>     einer        17-Methylpregnenverbindung.       Es wurde gefunden, dass man zu einer  neuen     17-Methylpregnenverbindung    gelangen  kann, wenn man ein 4     4-3,20-Dioxo-17a-methyl-          21-halogen-pregnen    mit einem das Halogen  atom durch die     Acetoxygruppe    ersetzenden  Mittel behandelt.  



  Das Verfahrensprodukt, das 4     4-3,20-Dioxo-          17a-methyl-21-acetoxy-pregnen        (17a-Methyl-          desoxycorticosteron-acetat)    vom F. = 176 bis  177 , ist neu. Es soll als     Heilmittel    oder als  Zwischenprodukt zur     Herstellung    von Heil  mitteln verwendet werden.   Die Umwandlung der     21-Halogenverbin-          dung    in das     21-Acetat    wird insbesondere mit  Hilfe von Salzen der Essigsäure, wie z. B.  Silberacetat, in Gegenwart von Verdünnungs  mitteln, wie organischen oder wässerigen Lö  sungsmitteln, z. B. in     Pyridin,    durchgeführt.  



  Das als Ausgangsstoff verwendete 4     4-3,20-          Dioxo-17a-methyl-21-halogen-pregnen    kann  vorteilhaft aus einem     d4-3-oxo-17a-methyl-          ätio-cholensäurehalogenid    durch     Umsetzung     mit     Diazomethan    und     anschliessender    Behand  lung mit     Halogenwasserstoffsäure    hergestellt  werden.  



  <I>Beispiel:</I>  1 Gewichtsteil     d4-17a-Methyl-3,20-dioxo-          21-chlor-pregnen    wird in 13     Volumteilen        Py-          ridin    gelöst und mit einer Lösung von 3 Ge  wichtsteilen Silberacetat in 13     Volumteilen          Pyridin    versetzt. Das Reaktionsgemisch wird  unter Stickstoff 2 Stunden zum Sieden erhitzt  und anschliessend in bekannter Weise aufge  arbeitet.

   Das erhaltene Rohprodukt liefert    nach     chromatographischer        Reinigung    0,6 Ge  wichtsteile reines     17a-Methyl-desoxy-corticoste-          ron-aeetat    der Formel  
EMI0001.0037     
    vom F. = 176-177 ;     [a]    D =     +    104  (in Chlo  roform).  



  In analoger Weise wie 4     4-17a-Methyl-3,20-          dioxo-21-chlor-pregnen        kann    auch das entspre  chende     21-Jodid    mit Silberacetat in     Pyridin     zum     17a-Methyl-desoxy-corticosteron-acetat     umgesetzt werden.  



  Das     Jod-keton    lässt sich z. B. auf folgendem  Weg bereiten:  1 Gewichtsteil     44-17a-Methyl-3,20-dioxo-          21-chlor-pregnen    wird in 40     Vohunteilen     Aceton mit 0,75     Gewichtsteilen        Natriumjodid     unter Stickstoff 45 Minuten     zum    Sieden er  hitzt. Die übliche Aufarbeitung und Kristalli  sation des     Rohproduktes    aus Aceton liefert 1  Gewichtsteil 4     4-17a-Methyl-3,20-dioxo-21-j        od-          pregnen    vom F. = 106-108 ; [a] D =     -I-    114   (in Chloroform).  



  Das als Ausgangsmaterial verwendete 4 4  17a-Methyl-3,20-dioxo-21-chlor-pregnen lässt  sich in einfacher Weise aus dem 44-17a-           Methyl-3-oxo-ätio-cholensäure-chlorid    auf fol  gendem Wege bereiten:  1     Gewichtsteil    dieser     Verbindung    wird in  einem Gemisch von 20     Vohunteilen    absolutem  Benzol und 15     Volutmteilen    Äther aufgenom  men und die Lösung bei     --15     in eine- äthe  rische Lösung von     Diazomethan    (enthaltend  0,3     Molil)    eingetropft.

   Das Reaktionsgemisch       wird'anschliessend    12     Stunden    bei -10 , dann  6 Stunden bei 0  aufbewahrt und schliesslich  bei 20  im     Vakuum    auf 30     Volumteile    ein  geengt. Es wird dann in 30     Volumteile    einer  Lösung von trockenem Chlorwasserstoff in  Äther (enthaltend 0,8     Gewichtsteile        HCl)    ein  getropft und 30 Minuten bei 20  aufbewahrt.

    Die     Aufarbeitung    des Reaktionsgemisches lie  fert 1,2 Gewichtsteile eines Rohproduktes, das  nach Filtration durch     Aluiminiumoxyd    und an  schliessender Kristallisation aus     Aceton-Petrol-          äther    0,65     Gewichtsteile    reines d     4-17a-Methyl-          3,20-dioxo-21-chlor-pregnen    vom F. = 166 bis  167  ergibt;     [a]D    =     -h    124  (in Chloroform).



  <B> Process </B> for the <B> production </B> of a 17-methylpregnene compound. It has been found that a new 17-methylpregnene compound can be obtained if a 4 4-3,20-dioxo-17a-methyl-21-halogen-pregnene is treated with an agent which replaces the halogen atom with the acetoxy group.



  The product of the process, the 4 4-3,20-dioxo-17a-methyl-21-acetoxy-pregnen (17a-methyldeoxycorticosterone acetate) from F. = 176 to 177, is new. It is said to be used as a remedy or as an intermediate in the manufacture of medicinal products. The conversion of the 21-halogen compound into the 21-acetate is carried out in particular with the aid of salts of acetic acid, such as. B. silver acetate, in the presence of diluents, such as organic or aqueous Lö solvents, z. B. in pyridine performed.



  The 4 4-3,20-dioxo-17a-methyl-21-halogen-pregnen used as starting material can advantageously be prepared from a d4-3-oxo-17a-methyl-ätio-cholenic acid halide by reaction with diazomethane and subsequent treatment with hydrohalic acid will.



  <I> Example: </I> 1 part by weight of d4-17a-methyl-3,20-dioxo-21-chloro-pregnen is dissolved in 13 parts by volume of pyridine and a solution of 3 parts by weight of silver acetate in 13 parts by volume of pyridine is added . The reaction mixture is heated to boiling for 2 hours under nitrogen and then worked up in a known manner.

   After chromatographic purification, the crude product obtained yields 0.6 parts by weight of pure 17a-methyl-deoxy-corticosterone acetate of the formula
EMI0001.0037
    from m. = 176-177; [a] D = + 104 (in chloroform).



  In a manner analogous to 4 4-17a-methyl-3,20-dioxo-21-chloro-pregnen, the corresponding 21-iodide can also be reacted with silver acetate in pyridine to form 17a-methyl-deoxy-corticosterone acetate.



  The iodine ketone can be z. B. prepare in the following way: 1 part by weight of 44-17a-methyl-3,20-dioxo-21-chloro-pregnen is heated in 40 Vohunteile acetone with 0.75 parts by weight of sodium iodide under nitrogen for 45 minutes to the boil. The usual work-up and crystallization of the crude product from acetone gives 1 part by weight of 4-17a-methyl-3,20-dioxo-21-j od-pregnen of F. = 106-108; [a] D = -I- 114 (in chloroform).



  The 4 4 17a-methyl-3,20-dioxo-21-chloro-pregnen used as starting material can be prepared in a simple manner from the 44-17a-methyl-3-oxo-etio-cholenic acid chloride in the following way: 1 Part by weight of this compound is taken up in a mixture of 20 parts by volume of absolute benzene and 15 parts by volume of ether and the solution is added dropwise at -15 to an ethereal solution of diazomethane (containing 0.3 mol / l).

   The reaction mixture is then stored for 12 hours at -10, then for 6 hours at 0 and finally concentrated at 20 in vacuo to 30 parts by volume. It is then added dropwise to 30 parts by volume of a solution of dry hydrogen chloride in ether (containing 0.8 parts by weight of HCl) and kept at 20 for 30 minutes.

    The work-up of the reaction mixture yields 1.2 parts by weight of a crude product which, after filtration through aluminum oxide and subsequent crystallization from acetone-petroleum ether, 0.65 parts by weight of pure d 4-17a-methyl-3,20-dioxo-21-chloro- pregnen from F. = 166 to 167 results; [a] D = -h 124 (in chloroform).

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer neuen 17- Methylpregnenverbindung, dadurch gekenn zeichnet, dass man ein d4-3,20-Dioxo-17a= methyl-21-halogen-pregnen mit einem das Ha logenatom durch die Acetoxygruppe ersetzen den Mittel behandelt. Das Verfahrensprodukt, das d 4-3,20-Dioxo- 17a-methyl-21-acetoxy-pregnen (17a-Methyl- desoxy-corticosteron-acetat) vom F. = 176 bis 177 , ist neu. PATENT CLAIM: Process for the production of a new 17-methylpregnene compound, characterized in that a d4-3,20-dioxo-17a = methyl-21-halogen-pregnene is treated with a halogen atom that is replaced by the acetoxy group. The product of the process, the d 4-3,20-dioxo-17a-methyl-21-acetoxy-pregnen (17a-methyldeoxy-corticosterone-acetate) from F. = 176 to 177, is new. Es soll als Heilmittel oder als Zwischenprodukt zur Herstellung von Heil- initteln verwendet werden. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als das Halogenatom durch die Acetoxygruppe ersetzendes Mittel Silberacetat in Gegenwart von Pyridin ver wendet. It is intended to be used as a medicinal product or as an intermediate product in the manufacture of medicinal products. SUBCLAIM: Process according to claim, characterized in that silver acetate in the presence of pyridine is used as the agent replacing the halogen atom with the acetoxy group.
CH298333D 1949-01-31 1949-01-31 Process for the preparation of a 17-methylpregnene compound. CH298333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH298333T 1949-01-31

Publications (1)

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CH298333A true CH298333A (en) 1954-04-30

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CH298333D CH298333A (en) 1949-01-31 1949-01-31 Process for the preparation of a 17-methylpregnene compound.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2860148A (en) * 1955-03-22 1958-11-11 Emanuel B Hershberg 17alpha-methyl-delta-pregnadiene compounds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2860148A (en) * 1955-03-22 1958-11-11 Emanuel B Hershberg 17alpha-methyl-delta-pregnadiene compounds

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