CH304307A - Process for the preparation of a substituted cumalic acid ester. - Google Patents

Process for the preparation of a substituted cumalic acid ester.

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Publication number
CH304307A
CH304307A CH304307DA CH304307A CH 304307 A CH304307 A CH 304307A CH 304307D A CH304307D A CH 304307DA CH 304307 A CH304307 A CH 304307A
Authority
CH
Switzerland
Prior art keywords
substituted
preparation
acid ester
acid
water
Prior art date
Application number
Other languages
German (de)
Inventor
F Hoffmann- Aktiengesellschaft
Original Assignee
Hoffmann La Roche
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 Hoffmann La Roche filed Critical Hoffmann La Roche
Publication of CH304307A publication Critical patent/CH304307A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D309/00Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings
    • C07D309/34Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
    • C07D309/36Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with oxygen atoms directly attached to ring carbon atoms
    • C07D309/38Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with oxygen atoms directly attached to ring carbon atoms one oxygen atom in position 2 or 4, e.g. pyrones

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

  

  Verfahren zur Herstellung eines substituierten     Cumalinsäureesters.       Es wurde gefunden, dass     Cumalinsäuren     und deren Ester, die in 4- und     6-Stellung     durch einen     Alkylrest    substituiert sind, ins  besondere solche, bei denen die     Alkylreste     mehr als ein     C-Atom    aufweisen,     bemerkens-           erte    antibakterielle     Wirkung    zeigen.

   So ver  mag die     4,6-Dibutyl-cumalinsäure    das Wachs  tum von     3Iy        eobacterium        Phlei    in     sy        ntlieti-          sebem    Milieu noch in einer Verdünnung von       i    15 y pro     em3    zu 90 oh, und dasjenige von       taphylocoeeus        aureus        zu        65%        zu        hemmen.     Die neuen Verbindungen sollen als Arznei  mittel verwendet werden.  



  Die neuen     Verbindungen    können in an  sieh bekannter Weise durch Kondensation der  Homologen des     Acetessigesters    unter dem  Einfluss von     hoehkonzentrierten,        vorzugsweise     wasserfreien     Mineralsäuren,    insbesondere Salz  säure oder Schwefelsäure, erhalten werden.  



       i    Die Kondensation mit Schwefelsäure führt zu  einem Gemisch von freier Säure und Ester,  das durch fraktionierte Destillation im Hoch  vakuum getrennt werden kann.  



  Gegenstand des Patentes ist nun ein Ver  fahren zur Herstellung von     4,6-Dipropyl-          cnmalinsäuremethylester,    das dadurch ge  kennzeichnet. ist, dass man auf     Btityry        1-essig-          säuremethylest.er    bei gewöhnlicher Tempera  tur eine     hoehkonzentrierte    Mineralsäure ein  9 wirken lässt, das Reaktionsprodukt mit Was  ser verdünnt., die wässerige Lösung mit einem  mit     Wasser    nicht mischbaren Lösungsmittel       extrahiert    und aus dem Extrakt den gesuch  ten Ester isoliert.

           Beispiel:     10 Gewichtsteile     Butyryl-essigsäuremethyl-          ester    werden mit 25 Gewichtsteilen konzen  trierter Schwefelsäure versetzt und 10 Tage  bei Zimmertemperatur stehengelassen. Man  giesst auf Eiswasser und extrahiert mit Äther.  Die ätherische Lösung wird mit Wasser ge  waschen und mit Natriumsulfat getrocknet,  der     Xther    bei gewöhnlichem Druck     abdestil-          liert    und der Rückstand im Vakuum fraktio  niert. Der     4,6-Dipropyl-ciunalinsäiiremethyl-          ester    . siedet unter 0,1 mm bei 130  C und  stellt ein gelbes öl dar.  



  Als weitere Fraktion geht bei 0,2 mm zwi  schen 180 - 190      @C    ein gelbes öl über, das  beim Erkalten halb fest wird     und    im wesent  lichen aus der     4,6-Dipropyl-ctunalinsäure    be  steht.



  Process for the preparation of a substituted cumalic acid ester. It has been found that cumalic acids and their esters which are substituted in the 4- and 6-positions by an alkyl radical, in particular those in which the alkyl radicals have more than one carbon atom, show a remarkable antibacterial effect.

   Thus 4,6-dibutyl-cumalic acid is able to inhibit the growth of 3Iy eobacterium Phlei in a sy ntlietisebem milieu at a dilution of 15% per em3 to 90% and that of Taphylocoeeus aureus to 65%. The new compounds are to be used as drugs.



  The new compounds can be obtained in a manner known per se by condensation of the homologues of the acetoacetic ester under the influence of highly concentrated, preferably anhydrous mineral acids, in particular hydrochloric acid or sulfuric acid.



       i The condensation with sulfuric acid leads to a mixture of free acid and ester, which can be separated by fractional distillation under high vacuum.



  The subject of the patent is now a process for the production of 4,6-Dipropyl- cnmalinsäuremethylester, which is characterized by ge. is that a highly concentrated mineral acid is allowed to act on Btityry 1-acetic acid methyl ester at normal temperature, the reaction product is diluted with water, the aqueous solution is extracted with a water-immiscible solvent and the extract is used th ester isolated.

           Example: 10 parts by weight of methyl butyryl acetate are mixed with 25 parts by weight of concentrated sulfuric acid and left to stand for 10 days at room temperature. It is poured into ice water and extracted with ether. The ethereal solution is washed with water and dried with sodium sulphate, the Xther is distilled off at normal pressure and the residue is fractionated in vacuo. The 4,6-dipropyl-ciunalinic acid methyl ester. boils below 0.1 mm at 130 C and is a yellow oil.



  A yellow oil passes over as a further fraction at 0.2 mm between 180-190 ° C, which becomes semi-solid on cooling and essentially consists of 4,6-dipropyl-ctunalic acid.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von 4,6-Dipro- pyl-cumalinsäuremethylester, dadurch gekenn zeichnet, dass man auf Buty-rylessigsäure- methylester bei gewöhnlicher Temperatur eine hochkonzentrierte Mineralsäure einwir ken lässt, das Reaktionsprodukt mit Wasser verdünnt, die wässerige Lösung mit einem mit Wasser nicht mischbaren Lösungsmittel ex trahiert und aus dem Extrakt den gesuchten Ester isoliert. Die neue Verbindung ist ein gelbes öl, das bei 130 C/0,1 mm siedet. PATENT CLAIM: Process for the production of 4,6-dipropyl-cumalinic acid methyl ester, characterized in that a highly concentrated mineral acid is allowed to act on methyl butyryl acetate at normal temperature, the reaction product is diluted with water and the aqueous solution is diluted with a Water-immiscible solvent is extracted and the desired ester is isolated from the extract. The new compound is a yellow oil that boils at 130 C / 0.1 mm.
CH304307D 1951-10-18 1951-10-18 Process for the preparation of a substituted cumalic acid ester. CH304307A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH300714T 1951-10-18
CH304307T 1951-10-18

Publications (1)

Publication Number Publication Date
CH304307A true CH304307A (en) 1954-12-31

Family

ID=25734279

Family Applications (1)

Application Number Title Priority Date Filing Date
CH304307D CH304307A (en) 1951-10-18 1951-10-18 Process for the preparation of a substituted cumalic acid ester.

Country Status (1)

Country Link
CH (1) CH304307A (en)

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