CH627159A5 - Process for the preparation of novel cholesterol derivatives - Google Patents
Process for the preparation of novel cholesterol derivatives Download PDFInfo
- Publication number
- CH627159A5 CH627159A5 CH202081A CH202081A CH627159A5 CH 627159 A5 CH627159 A5 CH 627159A5 CH 202081 A CH202081 A CH 202081A CH 202081 A CH202081 A CH 202081A CH 627159 A5 CH627159 A5 CH 627159A5
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- CH
- Switzerland
- Prior art keywords
- groups
- previtamin
- alkylene
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- mixture
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C401/00—Irradiation products of cholesterol or its derivatives; Vitamin D derivatives, 9,10-seco cyclopenta[a]phenanthrene or analogues obtained by chemical preparation without irradiation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J17/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, having an oxygen-containing hetero ring not condensed with the cyclopenta(a)hydrophenanthrene skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J53/00—Steroids in which the cyclopenta(a)hydrophenanthrene skeleton has been modified by condensation with a carbocyclic rings or by formation of an additional ring by means of a direct link between two ring carbon atoms, including carboxyclic rings fused to the cyclopenta(a)hydrophenanthrene skeleton are included in this class
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J9/00—Normal 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2602/00—Systems containing two condensed rings
- C07C2602/02—Systems containing two condensed rings the rings having only two atoms in common
- C07C2602/14—All rings being cycloaliphatic
- C07C2602/24—All rings being cycloaliphatic the ring system containing nine carbon atoms, e.g. perhydroindane
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Steroid Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Description
Die vorliegende Erfindung bezieht sich auf ein Verfahren 65 zur Herstellung von in der Herstellung von 24R, 25- und 24S,25-Dihydroxy-cholecalciferol und von 3-nieder-Alkanoy-laten hiervon verwendbaren neuen Prävitaminderivaten der Formel The present invention relates to a process 65 for the preparation of novel previtamin derivatives of the formula which can be used in the preparation of 24R, 25- and 24S, 25-dihydroxy-cholecalciferol and of 3-lower alkanoylates
627159 627159
worin Rj Hydroxy oder niederes Alkanoyloxy, R2 und R3 unabhängig voneinander niederes Alkyl oder zusammen niederes Alkylen bedeuten und die absolute Konfiguration am C-24 R oder S ist. wherein Rj is hydroxy or lower alkanoyloxy, R2 and R3 independently of one another are lower alkyl or together lower alkylene and the absolute configuration at C-24 is R or S.
a) eine Verbindung der Formel a) a compound of the formula
R< R <
worin Rl5 R2 und R3 obige Bedeutung haben und die absolute Konfiguration am C-24 R oder S ist, where Rl5 R2 and R3 have the above meaning and the absolute configuration at the C-24 is R or S,
in einem inerten Lösungsmittel zu einem Gemisch von Prävitamin und nicht umgesetztem Ausgangsmaterial bestrahlt, irradiated in an inert solvent to a mixture of previtamin and unreacted starting material,
b) das reine Prävitamin aus dem Gemisch abtrennt und c) das nicht umgesetzte Ausgangsmaterial in den Prozess zurückführt. b) the pure previtamin is separated from the mixture and c) the unreacted starting material is returned to the process.
Zweckmässig wird eine Verbindung der Formel II, vorzugsweise eine solche, worin R2 und R3 niederes Alkyl, insbesondere Methyl, darstellen, unter einer inerten Atmosphäre, wie Stickstoff, Helium oder Argon, mittels einer mit einem Glaskühlfinger versehenen Quecksilberlampe bei einer Temperatur zwischen etwa —40 und +25 °C bestrahlt, wobei während der Zeitspanne, in der die Hälfte des Ausgangsmaterials umgesetzt wird, die Bestrahlungstemperatur vorzugsweise -5 °C ist. Geeignete Bestrahlungsquellen sind Hochdruck-und Niederdruck-Quecksilberlampen, Xenon-Quecksilberlam-pen und Thallium-Quecksilberlampen, wobei Hochdruck-Quecksilberlampen, z.B. eine 450-W-Hanau-Hochdruck-Quecksilberlampe, bevorzugt sind. Der Glaskühlfinger kann aus Vycor- oder Corexglas oder aus Quarz sein. Geeignete inerte Lösungsmittel sind organische Lösungsmittel, wie Gemische von gesättigten aliphatischen Kohlenwasserstoffen, z.B. so Pentan, Hexan und Isooctan, und Äther, z.B. Monoglym, Di-glym und Tetrahydrofuran, wobei n-Hexan-Tetrahydrofuran bevorzugt ist. A compound of the formula II, preferably one in which R2 and R3 are lower alkyl, in particular methyl, is expedient under an inert atmosphere, such as nitrogen, helium or argon, by means of a mercury lamp provided with a glass cooling finger at a temperature between about -40 and +25 ° C irradiated, wherein during the period in which half of the starting material is reacted, the irradiation temperature is preferably -5 ° C. Suitable sources of radiation are high pressure and low pressure mercury lamps, xenon mercury lamps and thallium mercury lamps, high pressure mercury lamps, e.g. a 450 W Hanau high pressure mercury lamp are preferred. The glass cooling finger can be made of Vycor or Corex glass or quartz. Suitable inert solvents are organic solvents, such as mixtures of saturated aliphatic hydrocarbons, e.g. so pentane, hexane and isooctane, and ether, e.g. Monoglyme, Di-glym and tetrahydrofuran, with n-hexane-tetrahydrofuran being preferred.
Nach vollendeter Bestrahlung werden die Lösungsmittel abgedampft und der Rückstand in reine 55 24R,25- oder 24S,25-Dihydroxyprecholecalciferol-24,25-ketale und 3-Alkanoylate hiervon der Formel I und in reine nicht umgesetzten After completion of the irradiation, the solvents are evaporated off and the residue is converted into pure 55 24R, 25- or 24S, 25-dihydroxyprecholecalciferol-24,25-ketal and 3-alkanoylates thereof of the formula I and into pure unreacted form
3,24R,25- oder 3,24S,25-Trihydroxy-5,7-cholestadien-24,25-60 ketale und Alkanoylate hiervon der Formel II aufgetrennt. Zweckmässig wird die Auftrennung mittels eines Hochdruck-Flüssig-chromatographen, mit einem festen Absorptionsmittel, wie Po-rasil, Corasil, Biosil, Sorbax, Zorbax-Sil oder Sil-X, und einem 65 inerten organischen Eluierungsmittel, wie Gemische von Kohlenwasserstoffen, z. B. n-Hexan, Isooctan, Benzol oder Toluol, und Estern, wie Äthylacetat oder Äthylbenzoat, durchgeführt, wobei man vorzugsweise als Chromatograph einen Waters As 3,24R, 25- or 3,24S, 25-trihydroxy-5,7-cholestadiene-24,25-60 ketals and alkanoylates separated from the formula II. The separation is expediently carried out by means of a high-pressure liquid chromatograph, with a solid absorbent, such as Po-rasil, Corasil, Biosil, Sorbax, Zorbax-Sil or Sil-X, and a 65 inert organic eluent, such as mixtures of hydrocarbons, e.g. B. n-hexane, isooctane, benzene or toluene, and esters such as ethyl acetate or ethyl benzoate, carried out, preferably using a Waters As chromatograph
627 159 627 159
4 4th
sociates Chromatograph Modell 202, als Absorptionsmittel Porasil A und als Eluierungsmittel ein Gemisch von n-Hexan und Äthylacetat verwendet. sociates Chromatograph Model 202, used as absorbent Porasil A and as eluent a mixture of n-hexane and ethyl acetate.
Gegenüber vorbekannten Verfahren (siehe z.B. D.H.R. Barton et al., J.C.S. Chem. Com. 203, 1974 und H. DeLuca et al.. Tetrahedron Letters, 4147, 1972) hat das vorliegende Verfahren den Vorteil, dass nicht umgesetzte 3,24R,25- oder 3,24S,25-Trihydroxy-5,7-cholestadien-24,25-ketale und die 3-Alkanoylate hiervon in den Prozess zurückgeführt werden können, so dass eine hohe Ausbeute an reinen 24R.25- oder 24S,25-Dihydroxyprecholecalciferol-24,25-ketalen und 3-Alkanoylaten hiervon erreicht werden kann. Compared to previously known processes (see, for example, DHR Barton et al., JCS Chem. Com. 203, 1974 and H. DeLuca et al .. Tetrahedron Letters, 4147, 1972), the present process has the advantage that unconverted 3,24R, 25 - or 3,24S, 25-trihydroxy-5,7-cholestadiene-24,25-ketals and the 3-alkanoylates thereof can be returned to the process, so that a high yield of pure 24R.25- or 24S, 25- Dihydroxyprecholecalciferol-24.25-ketals and 3-alkanoylates thereof can be achieved.
Eine Verbindung der Formel II kann z. B. wie in der deutschen Offenlegungsschrift 2 710 Q62 beschrieben hergestellt werden. A compound of formula II can e.g. B. as described in German Offenlegungsschrift 2,710 Q62.
Beispiel 1 example 1
24,25-Dihydroxy-precholecalciferol-3-acetat-24,25-acetonid Eine Lösung von 0,498 g 3S,24R,25-Trihydroxy-5,7-chole-stadien-3-acetat-24,25-acetonid in 40 ml n-Hexan und 40 ml Tetrahydrofuran wird 10 Minuten bei —5 °C mit einer 450-W-Hanau-Hochdruck-Quecksilberlampe mit Vycor-Glaskühlfin-ger unter Argon bestrahlt. Die Lösungsmittel werden unter Vakuum bei 25 °C entfernt und der Rückstand mit einem Waters Associates Flüssigchromatographen Modell 202 mit 8' x3/8" Porasil A und einem 9:1-Gemisch n-Hexan/Äthylacetat als Elutionsmittel gereinigt. Man erhält 0,265 g Produkt in Form eines dicken Öls. 24,25-Dihydroxy-precholecalciferol-3-acetate-24,25-acetonide A solution of 0.498 g of 3S, 24R, 25-trihydroxy-5,7-chole-stadiene-3-acetate-24,25-acetonide in 40 ml n-Hexane and 40 ml of tetrahydrofuran are irradiated for 10 minutes at -5 ° C. with a 450 W Hanau high-pressure mercury lamp with Vycor glass cooling finger under argon. The solvents are removed under vacuum at 25 ° C. and the residue is purified with a Waters Associates model 202 liquid chromatograph with 8 'x3 / 8 "Porasil A and a 9: 1 mixture of n-hexane / ethyl acetate as eluent. 0.265 g of product is obtained in the form of a thick oil.
Beispiel 2 24R,25-Dihydroxy-precholecalciferol-24,25-acetonid Eine Lösung von 0,509 g 3S,24R,25-Trihydroxy-5,7-chole-stadien-24,25-acetonid in 40 ml n-Hexan und 40 ml Tetrahydrofuran wird 10 Minuten bei —5 °C mit einer 450-W-Hanau-Hochdruck-Quecksilberlampe mit Vycor-Glaskühlfinger unter Argon bestrahlt. Die Lösungsmittel werden dann unter Vakuum bei 25 °C entfernt und der Rückstand mit einem Waters Associates Flüssigchromatographen Modell 202 8' x 3/8" Porasil A und einem 4:1-Gemisch von n-Hexan/Äthylacetat als Example 2 24R, 25-Dihydroxy-precholecalciferol-24.25 acetonide A solution of 0.509 g 3S, 24R, 25-trihydroxy-5,7-chole-stadiene-24,25-acetonide in 40 ml n-hexane and 40 ml Tetrahydrofuran is irradiated for 10 minutes at -5 ° C with a 450 W Hanau high pressure mercury lamp with Vycor glass cooling fingers under argon. The solvents are then removed in vacuo at 25 ° C and the residue with a Waters Associates liquid chromatograph model 202 8 'x 3/8 "Porasil A and a 4: 1 mixture of n-hexane / ethyl acetate as
Eluierungsmittel gereinigt. Man erhält 0,258 g (50'r) Produkt in Form eines dicken Öls. Eluent cleaned. 0.258 g (50'r) of product are obtained in the form of a thick oil.
Beispiel 3 24S,25-Dihydroxy-precholecalciferol-5 3-acetat-24,25-acetonid Example 3 24S, 25-Dihydroxy-precholecalciferol-5 3-acetate-24,25-acetonide
Eine Lösung von 0.518 g 3S-24S,25-Trihydroxy-5,7-chole-stadien-3-acetat-24,25-acetonid in 40 ml n-Hexan und 40 ml Tetrahydrofuran wird 10 Minuten bei —5 °C unter Argon mit einer 450-W-Hanau-Hochdruck-Quecksilberlampe mit Vycor-10 Glaskühlfinger unter Argon bestrahlt. Die Lösungsmittel werden unter Vakuum bei 25 °C entfernt und der Rückstand mit einem Waters Associates Flüssigchromatographen Modell 202 mit 8' X 3/s" Porasil A und einem 9:1-Gemisch von n-Hexan/Äthylacetat als Eluierungsmittel gereinigt. Man erhält 15 0,220 g Produkt in Form eines dicken Öls. A solution of 0.518 g of 3S-24S, 25-trihydroxy-5,7-chole-stadiene-3-acetate-24,25-acetonide in 40 ml of n-hexane and 40 ml of tetrahydrofuran is stirred for 10 minutes at -5 ° C under argon irradiated with a 450 W Hanau high-pressure mercury lamp with Vycor-10 glass cooling fingers under argon. The solvents are removed under vacuum at 25 ° C. and the residue is purified using a Waters Associates model 202 liquid chromatograph with 8 'X 3 / s "Porasil A and a 9: 1 mixture of n-hexane / ethyl acetate as eluent. 15 is obtained 0.220 g product in the form of a thick oil.
Beispiel 4 24S,25-Dihydroxy-precholecalciferoI-24,25-acetonid Example 4 24S, 25-Dihydroxy-precholecalciferoI-24,25-acetonide
20 Eine Lösung von 0,477 g 3S,24S,25-Trihydroxy-5,7-chole-stadien-24,25-acetonid in 40 ml n-Hexan und 40 ml Tetrahydrofuran wird 10 Minuten bei —5 °C unter Argon mit einer 450-W-Hanau-Hochdruck-QuecksiIberlampe mit Vycor-Glaskühlfinger unter Argon bestrahlt. Die Lösungsmittel werden 25 unter Vakuum bei 25 °C entfernt und der Rückstand mit einem Waters Associates Flüssigchromatographen Modell 202 mit 8' x 3/a" Porasil A und einem 4:1-Gemisch von n-He-xan/Äthylacetat als Eluierungsmittel gereinigt. Man erhält 0,201 g (42%) Produkt in Form eines dicken Öls. 20 A solution of 0.477 g of 3S, 24S, 25-trihydroxy-5,7-chole-stadiene-24,25-acetonide in 40 ml of n-hexane and 40 ml of tetrahydrofuran is stirred for 10 minutes at -5 ° C under argon with a 450 -W-Hanau high-pressure mercury lamp irradiated with Vycor glass cooling fingers under argon. The solvents are removed under vacuum at 25 ° C and the residue is purified with a Waters Associates liquid chromatograph model 202 with 8 'x 3 / a "Porasil A and a 4: 1 mixture of n-He-xan / ethyl acetate as eluent. 0.201 g (42%) of product are obtained in the form of a thick oil.
30 30th
Beispiel 5 24R,25-Dihydroxyprecholecalciferol-24,25-acetonid Eine Lösung von 0,500 g 3S,24R,25-Trihydroxy-5,7-chole-35 stadien-24,25-acetonid in 100 ml Tetrahydrofuran wird 10 Minuten bei -5 ° C mit einer 450-W-Hanau-Hochdruck-Queck-silberlampe mit Vycor-Glaskühlfinger unter Argon bestrahlt. Die Lösungsmittel werden unter Vakuum bei 25 °C entfernt und der Rückstand mit einem Waters Associates Flüssigchro-40 matographen Modell 202 mit 8' x 3/8", Porasil A und einem 4:1-Gemisch von n-Hexan/Äthylacetat als Eluierungsmittel gereinigt. Man erhält 0,274 g Produkt in Form eines dicken Öls und 0,125 g nicht umgesetztes Ausgangsmaterial. Example 5 24R, 25-Dihydroxyprecholecalciferol-24,25-acetonide A solution of 0.500 g of 3S, 24R, 25-trihydroxy-5,7-chole-35 stadiene-24,25-acetonide in 100 ml of tetrahydrofuran is 10 minutes at -5 ° C irradiated with a 450 W Hanau high-pressure mercury lamp with Vycor glass cooling fingers under argon. The solvents are removed under vacuum at 25 ° C and the residue is purified with a Waters Associates liquid chromatograph model 202 with 8 'x 3/8 ", Porasil A and a 4: 1 mixture of n-hexane / ethyl acetate as eluent 0.274 g of product in the form of a thick oil and 0.125 g of unreacted starting material are obtained.
s s
Claims (3)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/664,799 US4021423A (en) | 1976-03-08 | 1976-03-08 | Syntheses of 24R,25- and 24S,25-dihydroxycholecalciferol |
US05/664,833 US4028349A (en) | 1976-03-08 | 1976-03-08 | Syntheses of 24R,25- and 24S,25-dihydroxycholesterol 24,25-ketals and alkanoyl derivatives thereof |
US05/664,848 US4026882A (en) | 1976-03-08 | 1976-03-08 | Syntheses of 3,24R,25- and 3,24S,25-trihydroxy-5,7-cholestadiene 24,25-ketals and alkanoyl derivatives thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CH627159A5 true CH627159A5 (en) | 1981-12-31 |
Family
ID=27418118
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH149077A CH626336A5 (en) | 1976-03-08 | 1977-02-08 | Process for the preparation of cholecalciferol derivatives |
CH202181A CH627764A5 (en) | 1976-03-08 | 1981-03-25 | Process for the preparation of cholestadiene derivatives |
CH202081A CH627159A5 (en) | 1976-03-08 | 1981-03-25 | Process for the preparation of novel cholesterol derivatives |
CH202281A CH627192A5 (en) | 1976-03-08 | 1981-03-25 | Process for preparing novel cholesterol derivatives |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH149077A CH626336A5 (en) | 1976-03-08 | 1977-02-08 | Process for the preparation of cholecalciferol derivatives |
CH202181A CH627764A5 (en) | 1976-03-08 | 1981-03-25 | Process for the preparation of cholestadiene derivatives |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH202281A CH627192A5 (en) | 1976-03-08 | 1981-03-25 | Process for preparing novel cholesterol derivatives |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS52108960A (en) |
CH (4) | CH626336A5 (en) |
DE (1) | DE2710062A1 (en) |
FR (1) | FR2343727A1 (en) |
GB (1) | GB1572952A (en) |
IT (1) | IT1078064B (en) |
NL (1) | NL7702484A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5735599A (en) * | 1980-08-05 | 1982-02-26 | Chugai Pharmaceut Co Ltd | 24,25-dihydroxycholestane and its preparation |
EP0063678B1 (en) * | 1981-04-29 | 1985-08-21 | F. HOFFMANN-LA ROCHE & CO. Aktiengesellschaft | Process for the preparation of cholesterol derivatives, and intermediate derivatives therefor |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1178427B (en) * | 1961-01-26 | 1964-09-24 | Olin Mathieson | Process for the preparation of 16ª ‡, 17ª ‡ -dihydroxysteroids of the pregnan series |
US3715374A (en) * | 1972-05-05 | 1973-02-06 | Wisconsin Alumni Res Found | 24,25-dihydroxycholecalciferol |
US3901928A (en) * | 1973-01-10 | 1975-08-26 | Robert Henry Hesse | 1' ,3' -dihydroxy steroid-5-enes method of preparing same and their use for preparing 1' -hydroxy-25-hydrogen vitamin d compounds |
JPS51128417A (en) * | 1975-04-28 | 1976-11-09 | Teijin Ltd | A method for stabilizing active vitamin d3 derivatives |
-
1977
- 1977-02-08 CH CH149077A patent/CH626336A5/en not_active IP Right Cessation
- 1977-02-28 IT IT20765/77A patent/IT1078064B/en active
- 1977-03-04 FR FR7706407A patent/FR2343727A1/en active Granted
- 1977-03-04 JP JP2291477A patent/JPS52108960A/en active Pending
- 1977-03-07 GB GB9480/77A patent/GB1572952A/en not_active Expired
- 1977-03-08 DE DE19772710062 patent/DE2710062A1/en not_active Ceased
- 1977-03-08 NL NL7702484A patent/NL7702484A/en not_active Application Discontinuation
-
1981
- 1981-03-25 CH CH202181A patent/CH627764A5/en not_active IP Right Cessation
- 1981-03-25 CH CH202081A patent/CH627159A5/en not_active IP Right Cessation
- 1981-03-25 CH CH202281A patent/CH627192A5/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB1572952A (en) | 1980-08-06 |
IT1078064B (en) | 1985-05-08 |
NL7702484A (en) | 1977-09-12 |
CH626336A5 (en) | 1981-11-13 |
CH627764A5 (en) | 1982-01-29 |
JPS52108960A (en) | 1977-09-12 |
FR2343727A1 (en) | 1977-10-07 |
FR2343727B1 (en) | 1984-01-13 |
CH627192A5 (en) | 1981-12-31 |
DE2710062A1 (en) | 1977-09-15 |
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