CH246177A - Process for the preparation of a new compound of the cyclopentano-polyhydrophenanthrene series. - Google Patents

Process for the preparation of a new compound of the cyclopentano-polyhydrophenanthrene series.

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Publication number
CH246177A
CH246177A CH246177DA CH246177A CH 246177 A CH246177 A CH 246177A CH 246177D A CH246177D A CH 246177DA CH 246177 A CH246177 A CH 246177A
Authority
CH
Switzerland
Prior art keywords
acid
cyclopentano
preparation
new compound
ring
Prior art date
Application number
Other languages
German (de)
Inventor
Reichstein Tadeus Dr Prof
Original Assignee
Reichstein Tadeus Dr Prof
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 Reichstein Tadeus Dr Prof filed Critical Reichstein Tadeus Dr Prof
Publication of CH246177A publication Critical patent/CH246177A/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)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Description

  

      Verfahren        zur    Herstellung     einer    neuen     Verbindung    der     Cyclopentano-          polyhydrophenanthrenreihe.       Es wurde gefunden, dass man zu     einer        im     Ring C ungesättigten     Verbindung    der     Cyclo-          pentanopolyhydrophenanthrenreihe    gelangen  kann, wenn man eine     d4,5-3-Keto-cholensäure,

       die im Ring C in     12-Stellung    einen zusam  men mit einem benachbarten Wasserstoff  atom     abspaltbaren        Substituenten    aufweist,  mit diesen     Substituenten    unter Bildung     einer          Doppelbindung    abspaltenden     Mitteln    behan  delt.  



  Der     12-ständige,    zusammen mit     einem        be-          nachbartenWasserstoffatom        abspaltbare        Sub-          stituent    des Ausgangsstoffes     kann    eine freie       Hydroxylgruppe    oder eine     beispielsweise     durch eine     Carbonsäure,    wie Essig-,     Propion-          oder        Benzoesäure,    durch eine     Sulfonsäure,

            Halogenwasserstoffsäure    oder     Xanthogen-          säure    veresterte     Hydroxylgruppe    sein.  



  Die Abspaltung     dieses        Substituenten    unter  Bildung einer Doppelbindung kann mit den  für diese Reaktion an sich bekannten Mit  teln erfolgen. Beispielsweise lässt sich eine  freie     Hydroxylgruppe    unter der     Einwirkung     von Mineralsäuren, vorzugsweise in Lösungs  mitteln, wie Eisessig, Alkohol,     Dioxan    und       dergl.,    von     Phosphoroxychlorid,        Bisulfaten,     von     Ameisensäure,        Oxalsäure,    von Säure  anhydriden,

   wie     Acetanhydrid    oder     Phos-          phorpentoxyd,    oder durch die Einwirkung  von Katalysatoren, wie Jod- oder     Carbon-          säuresalzen,    abspalten. Eine veresterte     Hy-          droxylgruppe    wird ausser durch die genann  ten Mittel     vorzugsweise    auch mit Alkalien,    Erdalkalien,     Carbonaten,    organischen Basen,  wie     Pyridin,        Dimethylanilin    usw., abgespal  ten.

   An Stelle oder     in    Kombination     mit    den  genannten Mitteln lässt sich auch erhöhte  Temperatur und/oder verminderter Druck an  wenden. Gegebenenfalls arbeitet man auch in  Gegenwart indifferenter Gase. Statt aus     Ha-          logenwasserstoffsäureestern    direkt Halogen  wasserstoff abzuspalten, kann man das Ha  logen auch in bekannter     Weise    durch einen       quaternären        Ammoniumrest    ersetzen und  diesen abspalten.  



  Das neue Verfahrensprodukt, die     44,5;11,12-          3-Keto-choladiensäure    vom F. 202-204 , bil  det einen     Methylester,    der bei     114-115      schmilzt. Es soll als Zwischenprodukt zur  Herstellung     therapeutisch    wertvoller Pro  dukte     dienen.     



  <I>Beispiel:</I>  In einem geräumigen     Destillierkolben    mit       Wurstansatz    wird     44,5_3_Keto-12-oXy-cholen-          säure    (erhalten aus     3-Oxy-12-acetoxy-cholan-          säuremethylester    durch Oxydation mit Chrom  säure in Eisessig bei Zimmertemperatur,     Bro-          mierung    und     Bromwasserstoffabspaltung    mit  tels     Pyridin)    im     Wasserstrahlvakuum    bei  12 mm Druck     etwas    vorgewärmt und dann  möglichst tief in ein Metallbad getaucht und  dieses auf 250  erhitzt.

   Diese     Badtemperatur     wird während einer halben Stunde beibehal  ten und dann allmählich auf     360-380     ge  steigert, wobei der     Inhalt    in lebhaftes. Sieden  gerät und destilliert. Das Destillat wird mit      Lauge in neutrale und     alkalilösliche    Anteile  zerlegt. Aus letzteren erhält man die     44,5;11,12-          3-geto-choladiensäure    der Formel  
EMI0002.0004     
    Aus     Chloroform-Pentan    umkristallisiert  schmilzt sie bei 202-204 .

   Sie wird am  zweckmässigsten über den     1VIethylester    völlig  gereinigt, der aus     Benzol-blethanol        in    Blätt  chen vom F. 114-115      kristallisiert.  



      Process for the production of a new compound of the cyclopentano polyhydrophenanthren series. It has been found that a compound of the cyclopentanopolyhydrophenanthrene series which is unsaturated in the ring C can be obtained if a d4,5-3-keto-cholenic acid,

       which has a substituent which can be split off together with an adjacent hydrogen atom in the 12-position in ring C, treated with agents which split off a double bond with these substituents.



  The 12-position substituent of the starting material which can be split off together with an adjacent hydrogen atom can be a free hydroxyl group or a sulfonic acid, for example by a carboxylic acid such as acetic, propionic or benzoic acid,

            Hydrohalic acid or xanthogenic acid esterified hydroxyl group.



  The elimination of this substituent with the formation of a double bond can be carried out with the means known per se for this reaction. For example, a free hydroxyl group can be anhydrides under the action of mineral acids, preferably in solvents, such as glacial acetic acid, alcohol, dioxane and the like, of phosphorus oxychloride, bisulfates, of formic acid, oxalic acid, of acid,

   such as acetic anhydride or phosphorus pentoxide, or through the action of catalysts such as iodine or carboxylic acid salts. An esterified hydroxyl group is, in addition to the means mentioned, preferably also split off with alkalis, alkaline earths, carbonates, organic bases such as pyridine, dimethylaniline, etc.

   Instead of or in combination with the agents mentioned, it is also possible to use increased temperature and / or reduced pressure. You may also work in the presence of inert gases. Instead of splitting off hydrogen halide directly from hydrohalic acid esters, the halogen can also be replaced in a known manner by a quaternary ammonium radical and this can be split off.



  The new process product, the 44,5; 11,12-3-keto-choladienoic acid with a melting point of 202-204, forms a methyl ester which melts at 114-115. It is intended to serve as an intermediate in the manufacture of therapeutically valuable products.



  <I> Example: </I> 44,5_3_Keto-12-oxy-cholenic acid (obtained from 3-oxy-12-acetoxy-cholanic acid methyl ester by oxidation with chromic acid in glacial acetic acid at room temperature in a spacious still with a sausage base , Bromination and elimination of hydrogen bromide by means of pyridine) is slightly preheated in a water jet vacuum at 12 mm pressure and then dipped as deep as possible into a metal bath and heated to 250.

   This bath temperature is maintained for half an hour and then gradually increased to 360-380, the contents becoming brisk. Boil and distill. The distillate is broken down into neutral and alkali-soluble components with lye. The 44,5; 11,12-3-geto-choladienoic acid of the formula is obtained from the latter
EMI0002.0004
    Recrystallized from chloroform-pentane, it melts at 202-204.

   It is most conveniently completely purified using the 1VIethylester, which crystallizes from benzene-bethanol in leaves with a m.p.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer im Ring C ungesättigten Verbindung der Cyclo- pentanopolyhydrophenanthrenreihe, dadurch gekennzeichnet, dass man eine d4,5-3-geto- cholensäure, die im Ring C in 12-Stellung einen zusammen mit einem benachbarten Wasserstoffatom abspaltbaren Substituenten aufweist, mit diesen Substituenten unter Bil dung einer Doppelbindung abspaltenden Mit teln behandelt. PATENT CLAIM: A process for the production of a compound of the cyclopentano-polyhydrophenanthrene series which is unsaturated in the ring C, characterized in that a d4,5-3-tocholenic acid which has a substituent which can be split off together with an adjacent hydrogen atom in the 12-position in ring C treated with these substituents to form a double bond separating means. Das neue Verfahrensprodukt, die d4,5;11,12- 3-geto-choladiensäure vom F. 202-204 , bil det einen Alethylester, der bei 114-115 schmilzt. Es soll als Zwischenprodukt zur Herstellung therapeutisch wertvoller Pro dukte dienen. UNTERANSPRüCHE: 1. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass man als Aus gangsstoff eine d4.5-3-geto-12-ogy-cholen- säure verwendet. 2. Verfahren nach Patentanspruch und Unteranspruch 1, dadurch gekennzeichnet, dass man den Ausgangsstoff einer ther mischen Zersetzung unterwirft. The new process product, the d4,5; 11,12-3-geto-choladienoic acid with a melting point of 202-204, forms an alethyl ester which melts at 114-115. It is intended to serve as an intermediate in the manufacture of therapeutically valuable products. SUBClaims: 1. Method according to claim, characterized in that a d4.5-3-geto-12-ogy-cholenic acid is used as the starting material. 2. The method according to claim and dependent claim 1, characterized in that the starting material is subjected to a thermal decomposition.
CH246177D 1942-01-28 1942-01-28 Process for the preparation of a new compound of the cyclopentano-polyhydrophenanthrene series. CH246177A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH240789T 1942-01-28
CH246177T 1942-01-28

Publications (1)

Publication Number Publication Date
CH246177A true CH246177A (en) 1946-12-15

Family

ID=25728541

Family Applications (1)

Application Number Title Priority Date Filing Date
CH246177D CH246177A (en) 1942-01-28 1942-01-28 Process for the preparation of a new compound of the cyclopentano-polyhydrophenanthrene series.

Country Status (1)

Country Link
CH (1) CH246177A (en)

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