CH305882A - Process for the preparation of a new ester. - Google Patents

Process for the preparation of a new ester.

Info

Publication number
CH305882A
CH305882A CH305882DA CH305882A CH 305882 A CH305882 A CH 305882A CH 305882D A CH305882D A CH 305882DA CH 305882 A CH305882 A CH 305882A
Authority
CH
Switzerland
Prior art keywords
preparation
new ester
diketo
formula
pregnen
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 CH305882A publication Critical patent/CH305882A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J17/00Normal steroids containing carbon, hydrogen, halogen or oxygen, having an oxygen-containing hetero ring not condensed with the cyclopenta(a)hydrophenanthrene skeleton
    • 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 zur Herstellung</B>     eines   <B>neuen Esters.</B>    Die vorliegende Erfindung betrifft ein  Verfahren zur Herstellung des     21-Furan-2'-          earbonsäureesters    von     Desoxyeorticosteron    (d     4-          3,20-Diketo-21-oxy-pregnen).     



  Der neue Ester wird erhalten, wenn man  ein d     4-3,20-Diketo-pregnen    der Formel  
EMI0001.0008     
    mit einer Verbindung der Formel  
EMI0001.0009     
    umsetzt, wobei X     und    Y bei der Reaktion sich  mit     Ausnahme    eines in einem von     ihnen    ent  haltenen Sauerstoffatoms abspaltende     Reste     bedeuten. Das     Verfahrensprodukt,    das     Desoxy-          corticosteron-furoat-    (2) [d     4-3;20-Diketo-21-          furoyl-(2')-oxy-pregnen],        schmilzt    bei 178,5       bis    179,5 .

   Es soll als     Heilmittel    verwendet  werden.  



  Im Ausgangsstoff der oben angegebenen  Formel kann X z. B. eine     Oxygruppe    sein,  die bei der     Umsetzung    mit     Furan-2-carbon-          säure    oder     einem        reaktionsfähigen    Derivat    davon, wie einem     Halogenid,    einem Ester oder  dem     Anhydrid,    in An- oder     Abwesenheit    eines  Kondensationsmittels die     Furoyl-    (2)     -oxy-          gruppe    ergibt.

   Ferner kann der genannte       Substituent    in     21-Stellung    eine     veresterte        Oxy-          gruppe,    z. B. ein Halogenatom, darstellen, das  bei der     Behandlung    mit     Furan-2-carbonsäure     oder einem     Salz    davon die     Furoyl-(2)-oxy-          gruppe    liefert.  



       Beispiel   <I>1:</I>  2 Gewichtsteile     Desoxycorticosteron    werden       in    5     Volumteilen    absolutem     Pyridin    gelöst und       unter        Eis-gochsalzkühlimg    mit 2     Volumteilen          Furan-2-carbonsäurechlorid    versetzt.

   Nach     40-          stündigem    Stehen bei     -15         wird    unter Küh  lung das     Reaktionsprodukt        mit    Eis     undWas-          ser    ausgefällt. Das     abfiltrierte    und mit Was  ser gewaschene     Desoxycorticosteron-furoat-(2)     der Formel  
EMI0001.0063     
    schmilzt nach     Umlösen    aus einer Mischung von  Aceton und Methanol bei 178,5 bis 179,5 ;  al<B>l'</B> =     -i-    208   4  (c = 1,00 in Chloroform).

             Beispiel   <I>2:</I>  1 Gewichtsteil d 4 - 3, 20 -     Diketo    - 21-     ehlor-          pregnen    wird     mit    50     Volumteilen    trockenem  Aceton versetzt. Nach Zugabe von 1 Gewichts  teil fein pulverisiertem     Natriumsalz    der     Fur        an-          2-carbonsäure    kocht man die Mischung 10       Stunden    unter     Rückfluss.    Die     abgekühlte    Re  aktionsmischung wird darauf mit Chloroform,  Äther und Wasser versetzt.

   Nach Waschen,  Trocknen und Eindampfen der organischen    Lösung kristallisiert man den Rückstand aus  einer Mischung von Aceton und Methanol um.  Das erhaltene     Furoat    des     Desoxycorticosterons     schmilzt bei 178,5 bis 179,5 .



  <B> Process for the production </B> of a <B> new ester. </B> The present invention relates to a process for the production of the 21-furan-2'-carboxylic acid ester of deoxyeorticosterone (d 4- 3,20-diketo- 21-oxy-pregnen).



  The new ester is obtained if one ad 4-3,20-diketo-pregnen of the formula
EMI0001.0008
    with a compound of the formula
EMI0001.0009
    converts, where X and Y are radicals which split off in the reaction with the exception of one of them contained oxygen atom. The product of the process, the deoxycorticosterone furoate (2) [d 4-3; 20-diketo-21-furoyl- (2 ') - oxy-pregnen], melts at 178.5 to 179.5.

   It is said to be used as a remedy.



  In the starting material of the formula given above, X can, for. B. be an oxy group, which in the reaction with furan-2-carboxylic acid or a reactive derivative thereof, such as a halide, an ester or the anhydride, in the presence or absence of a condensing agent, the furoyl- (2) -oxy- group results.

   Furthermore, said substituent in the 21-position can be an esterified oxy group, e.g. B. represent a halogen atom, which on treatment with furan-2-carboxylic acid or a salt thereof provides the furoyl (2) -oxy group.



       Example <I> 1 </I> 2 parts by weight of deoxycorticosterone are dissolved in 5 parts by volume of absolute pyridine and 2 parts by volume of furan-2-carboxylic acid chloride are added while cooling with ice and salt.

   After standing at -15 for 40 hours, the reaction product is precipitated with ice and water while cooling. The filtered off and washed with water deoxycorticosterone furoate (2) of the formula
EMI0001.0063
    melts after redissolution from a mixture of acetone and methanol at 178.5 to 179.5; al <B> l '</B> = -i- 208 4 (c = 1.00 in chloroform).

             Example <I> 2: </I> 1 part by weight of d 4 - 3, 20 - diketo - 21 - ehlorpregnen is mixed with 50 parts by volume of dry acetone. After adding 1 part by weight of finely powdered sodium salt of fur an-2-carboxylic acid, the mixture is refluxed for 10 hours. The cooled reaction mixture is then treated with chloroform, ether and water.

   After washing, drying and evaporation of the organic solution, the residue is recrystallized from a mixture of acetone and methanol. The furoate of deoxycorticosterone obtained melts at 178.5 to 179.5.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Esters, dadurch gekennzeichnet, dass man ein A 4-3,20-Diketo-pregnen der Formel EMI0002.0018 mit einer Verbindung der Formel EMI0002.0019 umsetzt, wobei X und Y bei der Reaktion sich mit Ausnahme eines in einem von ihnen enthaltenen Sauerstoffatoms abspaltende Reste bedeuten. PATENT CLAIM: Process for the preparation of a new ester, characterized in that an A 4-3,20-diketo-pregnen of the formula EMI0002.0018 with a compound of the formula EMI0002.0019 converts, where X and Y are radicals which split off during the reaction with the exception of an oxygen atom contained in one of them. Das Verfahrensprodukt, das Desoxy- corticosteron- furoat - (2) [ d 4 - 3,20 -Diketo - 21- furoyl-(2')-oxy-pregnen], schmilzt bei 178,5 bis 179,5 . The product of the process, the deoxycorticosterone furoate - (2) [d 4 - 3.20 -diketo - 21-furoyl- (2 ') - oxy-pregnen], melts at 178.5 to 179.5.
CH305882D 1951-10-18 1951-10-18 Process for the preparation of a new ester. CH305882A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH305882T 1951-10-18

Publications (1)

Publication Number Publication Date
CH305882A true CH305882A (en) 1955-03-15

Family

ID=4492600

Family Applications (1)

Application Number Title Priority Date Filing Date
CH305882D CH305882A (en) 1951-10-18 1951-10-18 Process for the preparation of a new ester.

Country Status (1)

Country Link
CH (1) CH305882A (en)

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