CH246179A - 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
CH246179A
CH246179A CH246179DA CH246179A CH 246179 A CH246179 A CH 246179A CH 246179D A CH246179D A CH 246179DA CH 246179 A CH246179 A CH 246179A
Authority
CH
Switzerland
Prior art keywords
acid
keto
cyclopentano
preparation
new compound
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 CH246179A publication Critical patent/CH246179A/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     3-Keto-cholansäure,

      die  im     Ring    C in     12-Stellung        einen    zusammen       mit    einem     benachbarten    Wasserstoffatom ab  spaltbaren     Substituenten        aufweist,    mit diesen       Substituenten    unter Bildung einer Doppel  bindung abspaltenden Mitteln behandelt.  



  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-          phorpentogyd,    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  anwenden. Gegebenenfalls arbeitet man auch  in Gegenwart indifferenter Gase. Statt aus       Halogenwasserstoffsäureestern    direkt Ha  logenwasserstoff abzuspalten, kann man das  Halogen auch in bekannter Weise durch  einen     quaternären        Ammoniumrest    ersetzen  und diesen abspalten.  



  Das neue Verfahrensprodukt, die     d11>12_          3-geto-cholensäure,    bildet einen     Methylester,     der bei 123-124  schmilzt. Es soll als       Zwischenprodukt    zur Herstellung therapeu  tisch wertvoller Produkte dienen.  



       Beispiel:     1 Teil     3-geto-12-oxy-cholansäure    (erhal  ten aus     3-Oxy-12-acetoxy-cholansäuremethyl-          ester    durch Oxydation mit Chromsäure in  Eisessig bei Zimmertemperatur und an  schliessende energische     Verseifung    mit Alkali)  wird im     Wasserstrählvakuum    allmählich     bis     auf 380  erhitzt, wobei das Material fast  restlos destilliert. Das Destillat wird mit  Lauge in neutrale und     alkalilösliche    Anteile  zerlegt.

   Aus letzteren erhält man die     d11.12-          3-geto-cholensäure    der Formel    
EMI0002.0001     
    Aus     Äther-Petroläther    umkristallisiert       schmilzt    sie bei     136-150 .    Sie wird am  besten über den     Methylester    völlig gereinigt,  der aus     Äther-Petroläther    in glasklaren,  dicken Körnern vom F. 123-124  kristalli  siert.  



  An Stelle der freien     12-Ogy-Verbindung     lässt sich z. B. auch die mit einer     Carbon-          säure    oder     Halogenwasserstoffsäure        ver-          esterte        12-Ogy-Verbindung    verwenden.     Im     letzteren Falle setzt man das     Halogenid    vor  teilhaft mit     Pyridin    um und spaltet das ent  stehende     Pyridiniumsalz        thermisch.    Zur Ab  spaltung der veresterten und     insbesondere    der  freien     Hydrogylgruppe    kann auch z.

   B. eine  Mischung von Eisessig und konzentrierter  Salzsäure verwendet werden. Ferner ist es  zweckmässig,     Xanthogensäureester    ebenfalls  einer thermischen Spaltung zu     unterwerfen.  



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

      which in the ring C in the 12-position has a substituent which can be split off together with an adjacent hydrogen atom, 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 take place 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 pentogide, or through the action of catalysts such as iodine or carboxylic acid salts. In addition to the agents mentioned, an esterified hydroxyl group is 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 split off.



  The new process product, d11> 12_ 3-geto-cholenic acid, forms a methyl ester that melts at 123-124. It is intended to serve as an intermediate product for the manufacture of therapeutically valuable products.



       Example: 1 part of 3-geto-12-oxy-cholanic acid (obtained from 3-oxy-12-acetoxy-cholanic acid methyl ester by oxidation with chromic acid in glacial acetic acid at room temperature and subsequent vigorous saponification with alkali) is gradually increased in a water jet vacuum to 380 heated, whereby the material distilled almost completely. The distillate is broken down into neutral and alkali-soluble components with lye.

   The d11.12-3-geto-cholenic acid of the formula is obtained from the latter
EMI0002.0001
    Recrystallized from ether-petroleum ether, it melts at 136-150. It is best completely purified using the methyl ester, which crystallizes from ether-petroleum ether in crystal-clear, thick grains of F. 123-124.



  Instead of the free 12-Ogy connection, z. B. also use the 12-Ogy compound esterified with a carboxylic acid or hydrohalic acid. In the latter case, the halide is partially reacted with pyridine and the resulting pyridinium salt is thermally cleaved. From the cleavage of the esterified and especially the free hydroyl group can also, for.

   B. a mixture of glacial acetic acid and concentrated hydrochloric acid can be used. It is also advisable to subject xanthogenic acid esters to thermal cleavage as well.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer im Ring C ungesättigten Verbindung der Cyclo- pentanopoIyhydrophenanthrenreihe, dadurch gekennzeichnet, dass man eine 3-Keto-cholan- säure, die im Ring C in 12-Stellung einen zusammen mit einem benachbarten Wasser stoffatom abspaltbaren Substituenten auf weist, mit diesen Substituenten unter Bil dung einer Doppelbindung abspaltenden Mit teln behandelt. PATENT CLAIM: A process for the production of a compound of the cyclopentanopolyhydrophenanthrene series which is unsaturated in the C ring, characterized in that a 3-keto-cholanic acid which has a substituent which can be split off together with an adjacent hydrogen atom in the 12-position in the C ring, treated with these substituents to form a double bond cleaving means. Das neue Verfahrensprodukt, die dll,lz- 3-Keto-cholensäure, bildet einen Methylester, der bei 123-124 schmilzt. Es soll als Zwischenprodukt zur Herstellung therapeu tisch wertvoller Produkte dienen. UNTERANSPRttCHE: 1. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass man als Aus gangsstoff eine 3-Keto-12-ogy-cholansäure verwendet. 2. Verfahren nach Patentanspruch und Unteranspruch 1, dadurch gekennzeichnet; dass man den Ausgangsstoff einer ther mischen Zersetzung unterwirft. The new process product, dll, lz- 3-keto-cholenic acid, forms a methyl ester that melts at 123-124. It is intended to serve as an intermediate product for the manufacture of therapeutically valuable products. SUB-CLAIM: 1. Method according to claim, characterized in that a 3-keto-12-ogy-cholanic acid is used as the starting material. 2. The method according to claim and dependent claim 1, characterized in that; that one subjects the starting material to a thermal decomposition.
CH246179D 1942-01-28 1942-01-28 Process for the preparation of a new compound of the cyclopentano-polyhydrophenanthrene series. CH246179A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH246179T 1942-01-28
CH240789T 1942-01-28

Publications (1)

Publication Number Publication Date
CH246179A true CH246179A (en) 1946-12-15

Family

ID=25728543

Family Applications (1)

Application Number Title Priority Date Filing Date
CH246179D CH246179A (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) CH246179A (en)

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