DE2462947C2 - Process for the preparation of 2,6-dihydroxycineol - Google Patents
Process for the preparation of 2,6-dihydroxycineolInfo
- Publication number
- DE2462947C2 DE2462947C2 DE2462947A DE2462947A DE2462947C2 DE 2462947 C2 DE2462947 C2 DE 2462947C2 DE 2462947 A DE2462947 A DE 2462947A DE 2462947 A DE2462947 A DE 2462947A DE 2462947 C2 DE2462947 C2 DE 2462947C2
- Authority
- DE
- Germany
- Prior art keywords
- dihydroxycineol
- epoxide
- solution
- pinol
- preparation
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D493/00—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
- C07D493/02—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
- C07D493/08—Bridged systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/96—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings spiro-condensed with carbocyclic rings or ring systems
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Gastroenterology & Hepatology (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pharmacology & Pharmacy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Furan Compounds (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Steroid Compounds (AREA)
Description
(a) bei 70° bis 85° C bei Normaldruck 1 bis 5 Stunden lang hydrolysiert, anschließend aussalzt und das erhaltene 2,6-Dihydroxycineol aus 5O°/oigem Ethanol auskristallisieren läßt, oder(a) at 70 ° to 85 ° C at normal pressure for 1 to 5 hours long hydrolyzed, then salted out and the 2,6-dihydroxycineol obtained 5O% ethanol can crystallize out, or
(b) 45 Minuten bei 125° C in einem Autoklaven hydrolysiert und das erhaltene 2,6-Dihydroxycineol nach dem Aussalzen mit Chloroform extrahiert (b) Hydrolyzed in an autoclave at 125 ° C for 45 minutes and the obtained 2,6-dihydroxycineol after salting out is extracted with chloroform
Die Erfindung betrifft die Herstellung von isomerenfreien 2,6-Dihydroxycineol im technischen Maßstab.The invention relates to the production of isomer-free 2,6-dihydroxycineol on an industrial scale.
2,6-Dihydroxycineol ist eine Verbindung, die kürzlich Gegenstand von Veröffentlichungen war (J. Wolinski et al, Tetrahedron, Bd. 27 (1971) 753/765 und 1579/1587; Cocker et al, J.Chem.Soc. Perkins Trans. 1972, 15/1, S. 1971/1980. Bei diesen Untersuchungen wurde festgestellt, daß diese Verbindung früher als cis-Pinolglykol bezeichnet wurde und mit der Verbindung identisch ist, die Gegenstand der DE-PS 24 28 039 ist.2,6-Dihydroxycineol is a compound that has recently been the subject of publications (J. Wolinski et al, Tetrahedron, Vol. 27 (1971) 753/765 and 1579/1587; Cocker et al, J. Chem. Soc. Perkins Trans. 1972, 15/1, S. 1971/1980. In these investigations it was found that this compound was earlier than cis-pinol glycol and is identical to the compound that is the subject of DE-PS 24 28 039.
Gemäß der Erfindung wird 2,6-Dihydroxycineol durch Hydrolyse von Pinolepoxid hergestellt, wie in den Ansprüchen dargelegt.According to the invention, 2,6-dihydroxycineol is produced by hydrolysis of pinol epoxide, as in US Pat Claims set out.
Der Syntheseweg kann wie folgt dargestellt werden:The synthesis route can be represented as follows:
HOHO
H3OH 3 O
H+ H +
OHOH
PinolepoxidPinole epoxide
2,6-Dihydroxycineol 2,6-dihydroxycineol
folgenden Absorptionsmaxima:the following absorption maxima:
3360αη-'(=2,97μ)
1453 cm-1 (= 6,88 μ)
1370 cm-! (=7,30 μ)
1107 cm-'(=9,03 μ)
1075 cm-'(=9,30 μ)
1010cm-'(= 9,90 μ)3360αη - '(= 2.97μ)
1453 cm- 1 (= 6.88 μ)
1370 cm-! (= 7.30 μ)
1107 cm - '(= 9.03 μ)
1075 cm - '(= 9.30 μ)
1010cm - '(= 9.90 μ)
ίο Diese Werte wurden nach der Kaliumbromid-Methode (Preßling) durch die folgenden Daten bestätigt:ίο These values were obtained using the potassium bromide method (Compact) confirmed by the following data:
3340αη-'(=2,99μ)
1456 cm-1 (= 6,87 μ)
1368αη-ΐ(=7,31μ)3340αη - '(= 2.99μ)
1456 cm- 1 (= 6.87 μ)
1368αη-ΐ (= 7.31μ)
1116 cm-1 (=8,96 μ)
1080 cm-^= 9,26 μ)
1017αη-·(=9,83μ)1116 cm- 1 (= 8.96 μ)
1080 cm - ^ = 9.26 μ)
1017αη- (= 9.83μ)
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die Hydrolyse bei einem pH-Wert im Bereich von 0,5 bis 1,5 durchführt2. The method according to claim 1, characterized in that the hydrolysis is carried out at a pH in the range of 0.5 to 1.5
Das erfindungsgemäß hergestellte 2,6-Dihydroxycineol wird für Arzneimittel verwendet, die in der DE-PS 24 28 039 beschrieben werden.The 2,6-dihydroxycineol prepared according to the invention is used for drugs that are described in DE-PS 24 28 039.
Die Erfindung wird durch die folgenden Beispiele weiter erläutertThe invention is further illustrated by the following examples
Herstellung von 2,6-Dihydroxycineol aus
PinolexpoxidManufacture of 2,6-dihydroxycineol from
Pinole Expoxide
16,8 g Pinolepoxid mit einer Reinheit von 98% wurden in 300 ml Wasser dispergiert Der Dispersion wurde eine Lösung von 3 g Phosphorsäure in 300 ml Wasser zugesetzt. Die Temperatur der wäßrigen Dispersion wurde auf 70°C erhöht. Diese Temperatur wurde eine Stunde aufrechterhalten. Die Dispersion wurde dann 12 Stunden bei Raumtemperatur gerührt und abschließend mit 25%iger Natriumhydroxydlösung auf pH 6,5 neutralisiert. Die in dieser Weise erhaltene Lösung wurde unter vermindertem Druck auf 1/3 ihres Volumens eingedampft und der Kristallisation unterworfen. Die erhaltene kristalline Verbindung wurde abfiltriert und aus 50%igem Äthanol umkristallisiert. Hierbei wurden 15 g 2,6-Dihydroxycineol vom Schmelzpunkt 124 bis 1250C erhalten.16.8 g of pinol epoxide with a purity of 98% were dispersed in 300 ml of water. A solution of 3 g of phosphoric acid in 300 ml of water was added to the dispersion. The temperature of the aqueous dispersion was increased to 70 ° C. This temperature was maintained for one hour. The dispersion was then stirred for 12 hours at room temperature and finally neutralized to pH 6.5 with 25% sodium hydroxide solution. The solution thus obtained was evaporated to 1/3 of its volume under reduced pressure and subjected to crystallization. The crystalline compound obtained was filtered off and recrystallized from 50% ethanol. 15 g of 2,6-dihydroxycineol with a melting point of 124 to 125 ° C. were obtained here.
Das 2,6-Dihydroxycineol, das nach dem Verfahren gemäß der Erfindung erhalten wird, hat eine bisher nie erreichte, durch Gaschromatographie bestimmte Reinheit von mehr als 98% und einen Schmelzpunkt von 124 bis 125°C. Die Verbindung ist in Wasser und organischen Lösungsmitteln löslich.The 2,6-dihydroxycineol obtained by the process according to the invention has never had one achieved a purity of more than 98% as determined by gas chromatography and a melting point of 124 up to 125 ° C. The compound is soluble in water and organic solvents.
Die Identität des gemäß der Erfindung hergestellten Dihydroxycineols wurde durch IR- und H-NMR-spektroskopische Daten bestätigt. Die NMR-Spektraldaten wurden an den Proben ermittelt, die gemäß der Erfindung hergestellt und vom chemischen Institut der Technischen Hochschule Mailand analysiert wurden. Das NMR-Spektrum (DCDl3) ist in A b b. 1 dargestellt.The identity of the dihydroxycineol prepared according to the invention was confirmed by IR and H-NMR spectroscopic data. The NMR spectral data were determined on the samples prepared according to the invention and analyzed by the Chemical Institute of the Technical University of Milan. The NMR spectrum (DCDl 3 ) is in A b b. 1 shown.
Das Infrarotspektrum des hergestellten 2,6-Dihydroxycineols in 10%iger Lösung in CHCI3 zeigt dieThe infrared spectrum of the 2,6-dihydroxycineol produced in 10% solution in CHCl3 shows the
Herstellung von 2,6-Dihydroxycineol aus
Pinolepoxid im technischen MaßstabManufacture of 2,6-dihydroxycineol from
Pinol epoxide on an industrial scale
3,4 kg Pinolepoxid, das eine Reinheit von mehr als 98% hatte, wurden in 1601 destilliertem Wasser dispergiert. Der Dispersion wurde eine Lösung von 0,2 kg Schwefelsäure in 201 Wasser zugesetzt. Durch äußeres Kühlen des Bades wurde das Reaktionsgemisch auf 85° C gebracht und 5 Stunden bei dieser Temperatur gehalten. Die Masse wurde dann 12 Stunden bei Raumtemperatur gerührt und abschließend mit 25%iger Natriumcarbonatlösung auf pH 6,5 neutralisiert. Die Lösung wurde unter vermindertem Druck auf 1/3 ihres Volumens eingedampft und der Kristallisation überlassen. Das erhaltene Rohprodukt wurde durch Umkristallisation aus 50%igem Äthanol gereinigt. Die Ausbeute an 2,6-Dihydroxycineol unter Berücksichtigung aller Teilausbeuten beträgt mehr als 90% der Theorie, der Schmelzpunkt 124 bis 125°C und die Reinheit mehr als 99%.3.4 kg of pinole epoxide, which was more than 98% pure, was dispersed in 160 liters of distilled water. A solution of 0.2 kg of sulfuric acid in water was added to the dispersion. By outside Cooling the bath, the reaction mixture was brought to 85 ° C and 5 hours at this temperature held. The mass was then stirred for 12 hours at room temperature and finally with 25% sodium carbonate solution neutralized to pH 6.5. The solution became 1/3 of its own under reduced pressure Evaporated in volume and left to crystallize. The obtained crude product was made by recrystallization Purified from 50% ethanol. The yield of 2,6-dihydroxycineol taking into account all Partial yields are more than 90% of theory, the melting point 124 to 125 ° C and the purity more than 99%.
Herstellung von 2,6-Dihydroxycineol aus
Pinolepoxid unter Druck im technischen MaßstabManufacture of 2,6-dihydroxycineol from
Pinol epoxide under pressure on an industrial scale
17,0 kg Pinolepoxid, das eine Reinheit von mehr als 98% hatte, wurden mit 501 destilliertem Wasser, dem vorher 5 g reine Schwefelsäure zugesetzt worden waren, in einen emaillierten Reaktor gegeben. Der Autoklav wurde geschlossen und 45 Minuten auf 125°C erhitzt. Die eiunommene Flüssigkeit wurde mit Calciumcarbonat auf pH 6,5 neutralisierL Die unter Zugabe von 0,1 kg Diatomit kalt filtrierte Lösung wurde auf das halbe Volumen eingeengt, mit NaCl ausgesalzt und fünfmal mit je 101 Chloroform extrahiert Aus den Chloroformfraktionen wurde kristallines 2,6-Dihydroxycineol von gaschromatographischer Reinheit erhalten. Unter Berücksichtigung der Teilausbeuten betrug die Ausbeute 90% der Theorie.17.0 kg pinol epoxide, which had a purity of more than 98%, were mixed with 50 l of distilled water, the 5 g of pure sulfuric acid had previously been added, placed in a glass-lined reactor. The autoclave was closed and heated to 125 ° C for 45 minutes. The ingested liquid was made with calcium carbonate neutralize to pH 6.5. The solution, filtered cold with the addition of 0.1 kg of diatomite, was reduced to half The volume was reduced, salted out with NaCl and extracted five times with 101 chloroform each time. From the chloroform fractions crystalline 2,6-dihydroxycineol of gas chromatographic purity was obtained. Considering of the partial yields, the yield was 90% of theory.
__ __
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
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3030th
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Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2512773 | 1973-06-12 | ||
IT2120574 | 1974-04-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2462947C2 true DE2462947C2 (en) | 1986-08-28 |
Family
ID=26327823
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2428039A Expired DE2428039C3 (en) | 1973-06-12 | 1974-06-11 | Medicines with choleretic effects, containing 2,6-dihydroxycineol |
DE2462947A Expired DE2462947C2 (en) | 1973-06-12 | 1974-06-11 | Process for the preparation of 2,6-dihydroxycineol |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2428039A Expired DE2428039C3 (en) | 1973-06-12 | 1974-06-11 | Medicines with choleretic effects, containing 2,6-dihydroxycineol |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS5944316B2 (en) |
AR (2) | AR202410A1 (en) |
CH (1) | CH605965A5 (en) |
DE (2) | DE2428039C3 (en) |
ES (1) | ES427240A1 (en) |
GB (2) | GB1469921A (en) |
NL (3) | NL176745C (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4542244A (en) * | 1982-09-13 | 1985-09-17 | Shell Oil Company | Oxabicycloalkane herbicides |
US4554366A (en) * | 1982-09-13 | 1985-11-19 | Shell Oil Company | Certain substituted, 7-oxabicyclo[2.2.1]heptan-2-ols and -2-ones as intermediates |
JPS61181403A (en) * | 1985-02-06 | 1986-08-14 | 島村 ▲てい▼次郎 | Stick |
-
1974
- 1974-05-28 AR AR253955A patent/AR202410A1/en active
- 1974-05-30 GB GB4347676A patent/GB1469921A/en not_active Expired
- 1974-05-30 GB GB2409074A patent/GB1468758A/en not_active Expired
- 1974-05-30 CH CH746374A patent/CH605965A5/xx not_active IP Right Cessation
- 1974-06-11 DE DE2428039A patent/DE2428039C3/en not_active Expired
- 1974-06-11 DE DE2462947A patent/DE2462947C2/en not_active Expired
- 1974-06-12 JP JP49066122A patent/JPS5944316B2/en not_active Expired
- 1974-06-12 NL NLAANVRAGE7407862,A patent/NL176745C/en not_active IP Right Cessation
-
1975
- 1975-04-18 AR AR258428A patent/AR202506A1/en active
-
1976
- 1976-05-14 ES ES427240A patent/ES427240A1/en not_active Expired
-
1984
- 1984-11-14 NL NL8403481A patent/NL8403481A/en not_active Application Discontinuation
- 1984-11-14 NL NL8403477A patent/NL8403477A/en not_active Application Discontinuation
Non-Patent Citations (3)
Title |
---|
J.Chem.Soc., Perkins Trans., 1972, S. 1971-1980 * |
Liebig's Ann.Chem., 259, 1890, S. 309-312 * |
Tetrahedr., 27, 1971, S. 753-765 * |
Also Published As
Publication number | Publication date |
---|---|
NL176745C (en) | 1985-06-03 |
GB1468758A (en) | 1977-03-30 |
NL8403477A (en) | 1985-03-01 |
NL7407862A (en) | 1974-12-16 |
JPS5944316B2 (en) | 1984-10-29 |
CH605965A5 (en) | 1978-10-13 |
DE2428039B2 (en) | 1980-10-30 |
NL8403481A (en) | 1985-03-01 |
DE2428039A1 (en) | 1975-01-09 |
AR202410A1 (en) | 1975-06-06 |
ES427240A1 (en) | 1976-09-01 |
JPS5035155A (en) | 1975-04-03 |
DE2428039C3 (en) | 1981-12-24 |
AR202506A1 (en) | 1975-06-13 |
NL176745B (en) | 1985-01-02 |
GB1469921A (en) | 1977-04-06 |
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Legal Events
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