CH242990A - Process for the production of a lactone. - Google Patents

Process for the production of a lactone.

Info

Publication number
CH242990A
CH242990A CH242990DA CH242990A CH 242990 A CH242990 A CH 242990A CH 242990D A CH242990D A CH 242990DA CH 242990 A CH242990 A CH 242990A
Authority
CH
Switzerland
Prior art keywords
lactone
oxy
production
acid
dioxy
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 CH242990A publication Critical patent/CH242990A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J19/00Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 by a lactone ring
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J75/00Processes for the preparation of steroids in general

Landscapes

  • 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

  

      Terfaliren    zur Herstellung eines     Lactons.       Es wurde gefunden, dass man zu einem       Lacton    der     Cyclopentanopolyhydrophena.n-          thren-Reihe    gelangen kann, wenn man ein       3a-Oxy-allopregnan-derivat    der allgemeinen  Formel  
EMI0001.0007     
    wobei Y ein Halogenatom bedeutet, mit Me  tallen in Gegenwart eines     inerten    Lösungs  mittels behandelt, die entstandene     Organo-          metallverbindung    mit     hydrolysierenden    Mit  teln zersetzt und das Reaktionsprodukt einer       Acylierung,

      Wasserabspaltung und Hydro  lyse unterwirft.  



  Das auf diese Weise erhaltene     Lacton,     das     d20.22    _     3a,21-Dioxy    -noi--allocholensäure-    Zwischenprodukt zur Herstellung therapeu  tisch verwendbarer Verbindungen dienen.  



  <I>Beispiel:</I>  1 g     3a-Oxy-21-bromacetoxy-allopregnan-          20-on    (erhalten aus     21-Diazo-allopregnan-3a-          ol-20-on    durch Behandlung mit Bromessig  säure) wird scharf getrocknet und mit 1 g       Zinkspänen    in     Benzollösung    zur Reaktion  gebracht. Zur Aufarbeitung wird mit Alko  hol verdünnt, heiss von unverändertem     Zink          abfiltriert    und das Filtrat in     2-n-Salzsäure     gegossen. Man destilliert mit Wasserdampf  die Lösungsmittel ab und nimmt den Rück  stand in Essigester auf.

   Nach dem Verdamp  fen des     Lösungsmittels    wird das Reaktions  produkt mit     I'yridin-Acetanhydrid    unter  mässigem Erwärmen     acetyliert.    Das     Acy        lie-          rungsprodukt    wird wie üblich aufgearbeitet       und        chromatographisch    getrennt.  



  Die     Benzol-Äther-Eluate    enthalten das  J'0,'z-3a-Acetoxy-21-oxy-nor-allocholeiisäurc-      positiven     Legaltest    gibt     und    die für     a,ss-un-          gesättigte        Lactone    typische U.     V.-Absorption          (Ami,,.    = 220     mss)    besitzt. Durch saure     Ver-          seifung    erhält man daraus das     d20,22_3a.21-          Dioxy-nor-allocholensäure-lacton    vom F. 243  bis 244 .  



  Die     Äther-Aceton-Eluate    enthalten das       Lacton    der     3a-Acetoxy-20,21-dioxy-nor-allo-          cholensäure,    das zwecks Wasserabspaltung  mit     Acetanhydrid    gekocht wird. Das so er  haltene Acetat des     Lactons    der     d20.22-ssa,21-          Dioxy-nor-allocholensäure    vom F. 230  wird  sauer verseift.



      Terfaliren for the production of a lactone. It has been found that a lactone of the Cyclopentanopolyhydrophena.nthren series can be obtained if a 3a-oxy-allopregnan derivative of the general formula is used
EMI0001.0007
    where Y is a halogen atom, treated with metals in the presence of an inert solvent, the resulting organometallic compound is decomposed with hydrolyzing agents and the reaction product of an acylation,

      Subjects to dehydration and hydrolysis.



  The lactone obtained in this way, the d20.22 _ 3a, 21-Dioxy -noi - allocholenic acid intermediate for the production of therapeutically usable compounds are used.



  <I> Example: </I> 1 g of 3a-oxy-21-bromoacetoxy-allopregnan-20-one (obtained from 21-diazo-allopregnan-3aol-20-one by treatment with bromoacetic acid) is sharply dried and reacted with 1 g of zinc shavings in benzene solution. For work-up, it is diluted with alcohol, filtered off from unchanged zinc while hot, and the filtrate is poured into 2N hydrochloric acid. The solvent is distilled off with steam and the residue is taken up in ethyl acetate.

   After evaporation of the solvent, the reaction product is acetylated with pyridine acetic anhydride with moderate warming. The acylation product is worked up as usual and separated by chromatography.



  The benzene-ether eluates contain the J'0, 'z-3a-acetoxy-21-oxy-nor-allocholeiic acid-positive legal test and the UV absorption typical for α, s-unsaturated lactones (Ami ,,. = 220 mss). Acid saponification gives d20,22_3a.21-dioxy-nor-allocholenic acid-lactone with a temperature of 243 to 244.



  The ether-acetone eluates contain the lactone of 3a-acetoxy-20,21-dioxy-nor-allo- cholenic acid, which is boiled with acetic anhydride in order to split off water. The acetate of the lactone d20.22-ssa, 21-dioxy-nor-allocholenic acid from F. 230 obtained in this way is saponified with acid.

 

Claims (1)

PATENTA\SPRUCH: Verfahren zur Herstellung eines Lac- tons der Cyclopentanopolyhydrophenanthren- Reihe, dadurch gekennzeichnet, dass man ein 3a-Oxy-allopregnan-derivat der allgemeinen Formel EMI0002.0027 wobei Y ein Halogenatom bedeutet, mit Me tallen in Gegenwart eines inerten Lösungs mittels behandelt, die entstandene Organo- metallverbindung mit hydrolysierenden Mit teln zersetzt und das Reaktionsprodukt einer Acylierung, PATENTA \ SPRUCH: Process for the production of a lactone of the cyclopentanopolyhydrophenanthrene series, characterized in that a 3a-oxy-allopregnan derivative of the general formula EMI0002.0027 where Y is a halogen atom, treated with metals in the presence of an inert solvent, the resulting organometallic compound is decomposed with hydrolyzing agents and the reaction product of an acylation, Wasserabspaltung und Hydro lyse unterwirft. Das auf diese Weise erhaltene Lacton, das d2o.22-3a,21-Dioxy-nor-allocholensäure- lacton vom F. 243-244 ist bekannt. Es soll therapeutische Verwendung finden oder als Zwischenprodukt zur Herstellung therapeu tisch verwendbarer Verbindungen dienen. UNTERAN SPRüCHE 1. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass man als Aus gangsstoff 3a - Oxy - 21 - bromacetoxy - allo- pregnan-20-on verwendet. 2. Subjects to dehydration and hydrolysis. The lactone obtained in this way, the d2o.22-3a, 21-dioxy-nor-allocholenic acid lactone of F. 243-244, is known. It should find therapeutic use or serve as an intermediate for the preparation of therapeutically applicable compounds. SUBSTITUTE DISCLAIMERS 1. Method according to claim, characterized in that the starting material used is 3a - oxy - 21 - bromoacetoxy - allo-pregnan-20-one. 2. Verfahren nach Patentanspruch und Unteranspruch 1, dadurch gekennzeichnet, dass man als Metall Zink verwendet. Process according to claim and dependent claim 1, characterized in that zinc is used as the metal.
CH242990D 1942-03-16 1942-03-16 Process for the production of a lactone. CH242990A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH242990T 1942-03-16
CH238516T 1942-03-16

Publications (1)

Publication Number Publication Date
CH242990A true CH242990A (en) 1946-06-15

Family

ID=25728324

Family Applications (1)

Application Number Title Priority Date Filing Date
CH242990D CH242990A (en) 1942-03-16 1942-03-16 Process for the production of a lactone.

Country Status (1)

Country Link
CH (1) CH242990A (en)

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