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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J19/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 by a lactone ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J75/00—Processes 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)
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) |
-
1942
- 1942-03-16 CH CH242990D patent/CH242990A/en unknown
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