DE734220C - Process for the preparation of 1,4-dioxy-2-methylnaphthalenedi-n-butyrate - Google Patents

Process for the preparation of 1,4-dioxy-2-methylnaphthalenedi-n-butyrate

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Publication number
DE734220C
DE734220C DEM147667D DEM0147667D DE734220C DE 734220 C DE734220 C DE 734220C DE M147667 D DEM147667 D DE M147667D DE M0147667 D DEM0147667 D DE M0147667D DE 734220 C DE734220 C DE 734220C
Authority
DE
Germany
Prior art keywords
dioxy
butyrate
methylnaphthalenedi
preparation
methylnaphthalene
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
Application number
DEM147667D
Other languages
German (de)
Inventor
Dr Fritz Von Werder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merck KGaA
Original Assignee
E Merck AG
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 E Merck AG filed Critical E Merck AG
Priority to DEM147667D priority Critical patent/DE734220C/en
Application granted granted Critical
Publication of DE734220C publication Critical patent/DE734220C/en
Expired legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/33Heterocyclic compounds
    • A61K31/335Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/35Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
    • A61K31/352Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline 
    • A61K31/3533,4-Dihydrobenzopyrans, e.g. chroman, catechin
    • A61K31/355Tocopherols, e.g. vitamin E

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (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)

Description

Verfahren zur Herstellung von 1, 4-Dioxy-2-methylnaphthalindi-n-butyrat Das Di-n-butyrat des 1, 4-Dioxy-2-methylnaphthalins hat nach den Arbeiten von Ansbacher, Fernholz und Dolliver (Journal of the American Chemical Society, Bd. 62 [I940], S. I56) Bedeutung als eine Substanz mit der physiologischen Wirkung des Vitamins K. Die genannten Autoren geben zwei Herstellungsverfahren für diese Verbindung an, die vom 1, -Dioxy-2-methylnaphthalin bzw. dem. entsprechenden Chinon ausgehen und 23 bzw. 55% der Theorie Ausbeute liefern.Process for the preparation of 1,4-dioxy-2-methylnaphthalenedi-n-butyrate The di-n-butyrate of 1,4-dioxy-2-methylnaphthalene has according to the work of Ansbacher, Fernholz and Dolliver (Journal of the American Chemical Society, Vol. 62 [I940], S. I56) Significance as a substance with the physiological effect of the vitamin K. The authors mentioned indicate two manufacturing processes for this compound, that of 1, -Dioxy-2-methylnaphthalene or the. go out corresponding quinone and Deliver 23 or 55% of the theoretical yield.

Die vorliegende Erfindung betrifft ein Verfahren zur Herstdlung von I, 4-Ditoxy-2-methylnaphthalindi-n-butyrat aus denselben Ausgangsmaterialien. Sie liefert aber mit Leichtigkeit Ausbeuten von 80% der Theorie und mehr. The present invention relates to a method for producing 1,4-Ditoxy-2-methylnaphthalenedi-n-butyrate from the same starting materials. she but gives yields of 80% of theory and more with ease.

Die Erfindung besteht darin, I, 4-Dioxy-2-methylnaphthalin mit einem geringen Überschuß an n-Buttersäureanhydrid zu erhitzen. The invention consists in I, 4-Dioxy-2-methylnaphthalene with a to heat a small excess of n-butyric anhydride.

Das als Ausgangsmaterial benutzte Hydrochinon läßt sich in annähernd quantitativer Ausbeute durch Reduktion des zugehörigen Chinons in ätherischer Lösung mit Wasserstoff bei Anwesenheit von Palladiumkohle herstellen. Die nach dem Abfiltrieren des Katalysators erhaltene Lösung wird eingedampft; der gewonnene Rückstand läßt sich direkt nach der angegebenen Vorschrift verestern.The hydroquinone used as the starting material can be approximately quantitative yield by reducing the corresponding quinone in ethereal solution with hydrogen in the presence of palladium carbon. The one after filtering off the solution obtained from the catalyst is evaporated; the residue obtained leaves esterify themselves directly according to the specified rule.

In der eingangs genannten Arbeit von A n Sb a ehe r und Mitarbeitern wird die Darstellung einer ganzen Reihe von Abkömmlingen des I, 4-Dioxy-2-methylnaphthalins beschrieben. Die Tatsache, daß nur für das Di-n-butyrat zwei Darstellungsverfahren an gegeben werden, beweist, daß sich die Verfasser nicht damit begnügt haben, diesen Ester irg,endlvie darzustlellen und auf seine biologische Wirksamkeit zu untersuchen. Die im Rahmen eines wissenschaftlichen Aufsatzes an und für sich ungewöhnliche Tatsache, daß für eine nicht kompliziert aufgebaute Verbindung zwei Darstellungsverfahren gegeben werden, zeigt vielmehr, daß sich die amerikanischen Autoren gerade um die Darstellung des Butyrates besonders ernstlich bemüht haben und daß der einfachere und weit bessere Ausbeuten liefernde Weg der vorliegenden Erfindung für den Fachmann nicht nahegelegen haben kann. In the aforementioned work by A n Sb a ehe r and employees is the representation of a whole series of derivatives of 1,4-dioxy-2-methylnaphthalene described. The fact that only for the di-n-butyrate two methods of preparation at given proves that the authors are not satisfied with it have to represent this ester irg, endlvie and its biological effectiveness to investigate. The in and of itself in the context of a scientific essay unusual fact that for a connection that is not complex, two Representation method given shows rather that the American Authors have made particularly serious efforts to describe the butyrate and that the simpler and far better yielding route of the present Invention may not have been obvious to the person skilled in the art.

Beispiel So g I, 4-Dioxy-2-methylnaphthalin und 200 g n-Buttersäureanhydrid werden I Stunde am Rückfluß gekocht; anschließend wird die Lösung bei einer Badtemperatur bis zu 150 im Vakuum ab destilliert. Der Rückstand wird mit 500 ccm Äther und 500 ccm Wasser 2 Stunden gerührt. Die Schichten werden getrennt; die Ätherlösung wird mit 1/ n-Natriumbicarbonatlösung und mit Wasser gewaschen, getrocknet, filtriert, eingeengt und im Vakuum abgezogen. Der noch warme Rückstand wird mit 150 com Normalbenzin versetzt. Nach 20 Stunden wird das in farblosen ,derben Kristallen ausgeschiedene Butyrat abgesaugt. mit Normalbenzin gewaschen und nochmals aus Ioo ccm Normalbenzin umkristallisiert. Die erhaltenen Kristalle werden im Vakuum bei Raumtemperatur über Paraffin getrocknet. Der Schmelzpunkt des reinen I, 4-Dioxy-2-methylnaphthalindi-n-butyrats liegt bei 52 bis 53°. Die Ausbeute heträgt 1 16 bis 120 g entsprechend 80 bis 83% der Theorie. Das Absorptionsspektrum im Ultraviolett weist ein ausgeprägtes Maximum bei 278 mm auf. Die Werte für den Extinktionskoeffizienten betragen für # = 278 mµ E1cm1% = 246. füs # = 247 mµ E1cm1% = 43. Example So g I, 4-dioxy-2-methylnaphthalene and 200 g n-butyric anhydride are refluxed for 1 hour; then the solution is at a bath temperature up to 150 distilled in vacuo. The residue is with 500 ccm of ether and 500 ccm of water stirred for 2 hours. The layers are separated; the ethereal solution becomes washed with 1 / n sodium bicarbonate solution and with water, dried, filtered, concentrated and stripped off in vacuo. The still warm residue is with 150 com normal gasoline offset. After 20 hours this precipitated in colorless, coarse crystals Butyrate sucked off. Washed with regular gasoline and again from 100 cc regular gasoline recrystallized. The crystals obtained are over in vacuo at room temperature Paraffin dried. The melting point of the pure 1,4-dioxy-2-methylnaphthalenedi-n-butyrate lies between 52 and 53 °. The yield is 16 to 120 g, corresponding to 80 to 83% the theory. The absorption spectrum in the ultraviolet shows a pronounced maximum at 278 mm. The values for the extinction coefficient are for # = 278 mµ E1cm1% = 246. füs # = 247 mµ E1cm1% = 43.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von 1, 4-Dioxy - 2 - methylnaphthalindi- n- butyrat, dadurch gekennzeichnet, daß man I, 4-Dioxy-2-methylnaphthalin mit einem geringen Überschuß von n- Buttersäureanhydrid crhitzt. PATENT CLAIM: Process for the production of 1, 4-Dioxy - 2 - methylnaphthalenedi- n-butyrate, characterized in that I, 4-dioxy-2-methylnaphthalene with a a small excess of n-butyric anhydride.
DEM147667D 1940-04-24 1940-04-24 Process for the preparation of 1,4-dioxy-2-methylnaphthalenedi-n-butyrate Expired DE734220C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM147667D DE734220C (en) 1940-04-24 1940-04-24 Process for the preparation of 1,4-dioxy-2-methylnaphthalenedi-n-butyrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM147667D DE734220C (en) 1940-04-24 1940-04-24 Process for the preparation of 1,4-dioxy-2-methylnaphthalenedi-n-butyrate

Publications (1)

Publication Number Publication Date
DE734220C true DE734220C (en) 1943-04-13

Family

ID=7336309

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM147667D Expired DE734220C (en) 1940-04-24 1940-04-24 Process for the preparation of 1,4-dioxy-2-methylnaphthalenedi-n-butyrate

Country Status (1)

Country Link
DE (1) DE734220C (en)

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