DE1670825A1 - Process for the preparation of 1,4-dihydropyridine derivatives - Google Patents
Process for the preparation of 1,4-dihydropyridine derivativesInfo
- Publication number
- DE1670825A1 DE1670825A1 DE19671670825 DE1670825A DE1670825A1 DE 1670825 A1 DE1670825 A1 DE 1670825A1 DE 19671670825 DE19671670825 DE 19671670825 DE 1670825 A DE1670825 A DE 1670825A DE 1670825 A1 DE1670825 A1 DE 1670825A1
- Authority
- DE
- Germany
- Prior art keywords
- pyridyl
- substituted
- halogen atoms
- radical
- dihydropyridine derivatives
- 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.)
- Pending
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Hydrogenated Pyridines (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Verfahren zur Herstellung von 1, 4-Dihydropyridinderivaten Die starke Zunahme coronarer Durchblutungsstörungen mit ihren zum Teil schwerwiegeiaden Folgeerkrankungen hat zu zahlreichen Versuchen geführt, wirksame Verbindungen zur Behandlung dieser Erkrankungen aufzufinden. Die bisher angewandten handelsüblichen Präparate haben jedoch bei der Coronarinsuffizienz, vor allem bei der schmerzhaften Angina pectoris, nicht immer sichere Erfolge gezeigt. In den meisten Fällen war man hier immer noch auf die Anwendung von Nitriten mit vibrer die Herzentlastung fördernden Wirkung angewiesen.Process for the preparation of 1,4-dihydropyridine derivatives The strong one Increase in coronary circulatory disorders with their sometimes serious secondary diseases has led to numerous attempts to find effective compounds to treat this Find diseases. The commercially available preparations used so far have however, in coronary insufficiency, especially in painful angina pectoris, not always shown certain successes. In most cases you were still here on the use of nitrites with vibrer the heart relief promoting effect reliant.
Es wurde nun gefunden, daß 1, 4-Dihydropyridinderivate der allgemeinen Formel in der R einen o B-oder @-Pyridylrest, R'eine Alkylgruppe von 1 bis 4 Kohlenstoffatomen, X einen Pyridyl-oder Pyrimidylrest, die durch eine oder mehrere niedere Alkyl-, niedere Alkoxy-, niedere Alkylaminogruppen oder Halogenatome substituiert sein können, oder einen Phenylrest, der durch 1 bis 2 Halogenatome, 1 bis 2 niedere Alkyl-, niedere Alkoxy-, niedere Alkylamino-oder Nitro-oder Aminogruppen subatituiert sein kann, bedeuten, sowohl bei intravenöser Gabe als auch peroral eine deutliche und langanhaltende Coronarerweiterung mit einer allen bekannten Handelsprodukten überlegenen Wirkungsdauer hervorrufen. Die Coronarwirkung wird im Tierexperiment durch einen gleichzeitig vorhandenen nitritähnlichen Effekt günstig unterstützt.It has now been found that 1,4-dihydropyridine derivatives of the general formula in which R is an o B or @ pyridyl radical, R 'is an alkyl group of 1 to 4 carbon atoms, X is a pyridyl or pyrimidyl radical, which can be substituted by one or more lower alkyl, lower alkoxy, lower alkylamino or halogen atoms, or a phenyl radical, which can be substituted by 1 to 2 halogen atoms, 1 to 2 lower alkyl, lower alkoxy, lower alkylamino or nitro or amino groups, mean, both intravenously and orally, a clear and long-lasting coronary expansion with a produce a duration of action that is superior to all known commercial products. The coronary effect is favorably supported in animal experiments by a simultaneous nitrite-like effect.
Die neuen Verbindungen werden erfindungsgemäß erhalten, indem man Pyridin-, Pyrimidin-, bzw. Benzaldehyde, welche, wie oben angegeben, substituiert sein können, mit Ammoniak und Acylfettsäureestern der Formel R-CO-CH2-COOR', in der R einen d-,-oder r-Pyridylrest und R'eine Alkylgruppe mit 1 bis 4 Kohlenstoffatomen bedeuten, in organischen Lösungsmitteln, wie Methanol oder Alkohol, zur Umsetzung bringt. Die erhaltenen Verbindungen sind in Form ihrer mit nichttoxischen anorganischen oder organischen Säuren gebildeten Salze gut wasserlöslich. The new compounds are obtained according to the invention by Pyridine, pyrimidine or benzaldehydes, which, as indicated above, are substituted can be, with ammonia and acyl fatty acid esters of the formula R-CO-CH2-COOR ', in R is a d-, - or r-pyridyl radical and R 'is an alkyl group having 1 to 4 carbon atoms mean in organic solvents, such as methanol or alcohol, to implement brings. The compounds obtained are in the form of their non-toxic inorganic ones salts formed or organic acids are readily soluble in water.
Beispiel 1 4- (4'-Methoxyphenyl)-2, 6-di-'Y-pyridyl-3, 5-dicarbonsäureäthylester-1,4-dihydropyridin Nach 3-stündigem Kochen von 6 g 4-Methoxybenzaldehyd, 20 g t-Pyridoylessigsäureäthylester und 6 ccm Ammoniak in 15 cem Methanol werden nach dem Abfiltrieren und KUhlen 15 g gelber Kristalle vom Fp. 112°C erhalten (Äther). (HCl-Salz Fp. 199 bis 201°C).Example 1 4- (4'-Methoxyphenyl) -2, 6-di-'Y-pyridyl-3, 5-dicarboxylic acid ethyl ester 1,4-dihydropyridine After boiling 6 g of 4-methoxybenzaldehyde and 20 g of ethyl tert-pyridoylacetate for 3 hours and 6 cc ammonia in 15 cem methanol are after filtering off and cooling 15 g of yellow crystals with a melting point of 112 ° C. were obtained (ether). (HCl salt m.p. 199 to 201 ° C).
Mit 3, 4-Dioxymethylenbenzaldehyd wird auf gleiche Weise eine Verbindung vom Fp. 218°C (HCl-Salz) erhalten.' Beispiel 2 4-(2'-Nitrophenyl)-2, 6-di-'t-pyridyl-3, 5-dicarbonsäureäthylester-1, 4-dihydropyridin Man erhitzt 15 g 2-Nitrobenzalde, 40 g #-Pyridoylessigsäureäthylester und 11 ccm Ammoniak in 60 cem Alkohol 3 bis 4 Stunden zum Sieden, saugt den Niederschlag ab, wäscht mit Alkohol nach und erhält 34 g gelber Kristalle vom Fp. 223 bis 225°C.With 3, 4-dioxymethylene benzaldehyde is a compound in the same way obtained from m.p. 218 ° C (HCl salt). Example 2 4- (2'-nitrophenyl) -2, 6-di-'t-pyridyl-3, 5-dicarboxylic acid ethyl ester-1, 4-dihydropyridine is heated 15 g of 2-nitrobenzaldehyde, 40 g of # -pyridoyl acetic acid ethyl ester and 11 cc of ammonia in 60 cem alcohol to boiling for 3 to 4 hours, sucks off the precipitate, washes with alcohol after and receives 34 g of yellow crystals with a melting point of 223 to 225.degree.
Die mit 4-Nitrobenzaldehyd bzw. 3-Nitrobenzaldehyd erhaltenen entsprechenden Verbindungen schmelzen bei 193 bzw. 138°C.The corresponding obtained with 4-nitrobenzaldehyde or 3-nitrobenzaldehyde Compounds melt at 193 and 138 ° C, respectively.
Beispiel 3 4-(4'-Chlorphenyl)-2, 6-di-ß-pyridyl-3, 5-dicarbonsäureäthylester-1, 4-dihydropyridin Eine Lösung von 40 g ß-Pyridoylessi. gsäureäthylester, 14 g 4-Chlorbenzaldehyd und 11 com Ammoniak in 40 ccm Methanol wird 6 bis 8 Stunden zum Sieden erhitzt und anschließend eingedampft. Man nimmt den Rückstand in Aceton/Äther auf und fällt das HCl-Salz mit ätherischer Salzsäure. Es werden 43 g gelber Kristalle vom Fp. 240°C erhalten.Example 3 4- (4'-chlorophenyl) -2, 6-di-ß-pyridyl-3, 5-dicarboxylic acid ethyl ester-1, 4-dihydropyridine A solution of 40 g of ß-pyridoylessi. ethyl acetate, 14 g of 4-chlorobenzaldehyde and 11 com ammonia in 40 cc of methanol is heated to the boil for 6 to 8 hours and then evaporated. The residue is taken up in acetone / ether and precipitated the HCl salt with essential hydrochloric acid. There are 43 g of yellow crystals of melting point. 240 ° C obtained.
Beispiel 4 4- (3'-Pyridyl)-2, 6-di-ß-pyridyl-3, 5-dicarbonsäureäthylester-1, 4-dihydropyridin Man erhitzt 30 g ß-Pyridoylessigsäureäthylester, 8 ccm Pyridin-3-aldehyd und 9 ccm Ammoniak in 15 ccm Methanol 5 Stunden zum Sieden und erhält gelbe Kristalle vom Fp. 178°C (Benzol/ Ligroin) ; (HCl-Salz Fp. 195°C).Example 4 4- (3'-pyridyl) -2, 6-di-ß-pyridyl-3, 5-dicarboxylic acid ethyl ester-1, 4-dihydropyridine 30 g of ß-pyridoyl acetic acid ethyl ester and 8 cc of pyridine-3-aldehyde are heated and 9 cc of ammonia in 15 cc of methanol to boiling for 5 hours and yellow crystals are obtained mp 178 ° C (benzene / ligroin); (HCl salt m.p. 195 ° C).
Mit Pyridin-4-aldehyd wird eine entsprechende Verbindung vom Fp. 205°C (HOl-Salz) erhalten.A corresponding compound with a melting point of 205.degree. C. is made with pyridine-4-aldehyde (HOl salt) obtained.
Beispiel 5 4-(3'-Pyridyl)-2, 6-di-d-pyridyl-3, 5-dicarbonsäureäthylester-1, 4-dihydropyridin Nach 4-bis 5-stündigem Erhitzen einer Lösung von 30 g W-Pyridoylessigsäureäthylester, 8 ccm Pyridin-3-aldehyd und 9 ccm Ammoniak in 20 ccm Methanol und anschließendem Kühlen werden 28 g hellgrauer Kristalle vom Fp. 163 bis 165°C erhalten.Example 5 4- (3'-pyridyl) -2, 6-di-d-pyridyl-3, 5-dicarboxylic acid ethyl ester-1, 4-dihydropyridine After 4 to 5 hours of heating a solution of 30 g of W-pyridoyl acetic acid ethyl ester, 8 cc of pyridine-3-aldehyde and 9 cc of ammonia in 20 cc of methanol and then On cooling, 28 g of light gray crystals with a melting point of 163 ° to 165 ° C. are obtained.
Die mit Pyridin-4-aldehyd erhaltene entsprechende Verbindung schmilzt bei 134°C.The corresponding compound obtained with pyridine-4-aldehyde melts at 134 ° C.
Beispiel 6 4-(4',6'-Dimethoxy-5'-pyrimidyl)-2,6-di-#-pyridyl-3,5-dicarbonsaureäthylester-1, 4-dihydropyridin Nach 6-bis 8-stündigem Erhitzen von 8, 4 g 4, 6-Dimethoxypyrimidin-5-aldehyd, 20 g t-Pyridoylessigsäureäthylester und 6 ccm Ammoniak in 30 ccm Alkohol werden nach dem Abfiltrieren und Kühlen 9 g gelber Kristalle vom Fp. 233 bis 235°C erhalten.Example 6 4- (4 ', 6'-Dimethoxy-5'-pyrimidyl) -2,6-di - # - pyridyl-3,5-dicarboxylic acid ethyl ester-1, 4-dihydropyridine After 6 to 8 hours of heating of 8.4 g of 4,6-dimethoxypyrimidine-5-aldehyde, 20 g of ethyl t-pyridoylacetate and 6 cc of ammonia in 30 cc of alcohol are used After filtering off and cooling, 9 g of yellow crystals of melting point 233 ° to 235 ° C. were obtained.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF0051879 | 1967-03-20 |
Publications (1)
Publication Number | Publication Date |
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DE1670825A1 true DE1670825A1 (en) | 1971-03-11 |
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ID=7104982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE19671670825 Pending DE1670825A1 (en) | 1967-03-20 | 1967-03-20 | Process for the preparation of 1,4-dihydropyridine derivatives |
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DE (1) | DE1670825A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4900750A (en) * | 1984-08-17 | 1990-02-13 | John Wyeth & Brother, Limited | 1.4-Dihydropyridines |
-
1967
- 1967-03-20 DE DE19671670825 patent/DE1670825A1/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4900750A (en) * | 1984-08-17 | 1990-02-13 | John Wyeth & Brother, Limited | 1.4-Dihydropyridines |
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