CH263148A - Process for the preparation of a new derivative of naphthyridine. - Google Patents

Process for the preparation of a new derivative of naphthyridine.

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Publication number
CH263148A
CH263148A CH263148DA CH263148A CH 263148 A CH263148 A CH 263148A CH 263148D A CH263148D A CH 263148DA CH 263148 A CH263148 A CH 263148A
Authority
CH
Switzerland
Prior art keywords
naphthyridine
amino
dimethyl
preparation
new derivative
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Cilag
Original Assignee
Cilag 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 Cilag Ag filed Critical Cilag Ag
Publication of CH263148A publication Critical patent/CH263148A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D471/00Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/04Ortho-condensed systems

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

Description

  

  Verfahren zur Darstellung eines neuen Derivates des     Naphthyridins.       Es wurde gefunden, dass     Verbindungen     der allgemeinen Formel  
EMI0001.0003     
    worin     R,    die     llethyl-    oder die     Hydroxyl-          gruppe,        R"    die     Amino-    oder eine     Alkoxy-          gruppe,    z.

   B.     Butoxygruppe,        R3    ein     Halogen-          oder    ein Wasserstoffatom und     R4    ein Halo  genatom bedeuten, eine überraschend gute  Wirksamkeit gegen Kleinorganismen, wie  Bakterien, Amöben,     Protozoen    usw., besitzen       und    daher     als    Desinfektionsmittel sowohl für  Gegenstände als auch für den lebenden Kör  per, insbesondere als Wund- und Darmdesin  fizienzien, wertvoll sind.

   Sie können in Form    von Pulvern, Lösungen, oder zu Sprays,  Emulsionen, Suspensionen, Pasten, Salben,  Pudern     usw.    verarbeitet, zum     Einreiben,    Ein  nehmen, Injizieren, Versprühen, Imprägnie  ren usw. verwendet werden.  



  Die neuen Verbindungen können in ein  facher Weise durch     Halogenierung    von Ver  bindungen der allgemeinen Formel  
EMI0001.0023     
    in welcher     R.,    und     R.2    die oben erwähnte Be  deutung haben, gewonnen werden, wobei je  nach den Reaktionsbedingungen ein oder zwei  Halogenatome in das     ?Molekül    eintreten.

      Als besonders stark wirksam haben sich erwiesen:  das     2,4-Dimethyl-6-chlor-7-amino-1,8-naphthyridin    vom     Smp.    1340,  das     2,4-Dimethi-l-6-chlor-7-(n-butoxy)-1,8-naphthyridin    vom     Smp.    770 und  das     2,4-Dimethyl-3,6-dichlor-7-(n-butoxy)-1,8-naphthyridin    vom     Smp.    137 bis 1390.  Eine gute Wirksamkeit zeigen ferner:  das     2,4-Dimethyl-3,6-dichlor-7-amino-1,8-naphthyridin,     das     2,4-Diinethyl-6-brom-7-amino-1,8-naphthyridin,     das     2,4-Dimethyl-3,6-dibrom-7-amino-1,8-naphtliyridin,    .

    das     2,4-Dimethyl-6-jod-7-amino-1,8-naphthyridin,     das     2,4-Dimethyl-3,6-dijod-7-amino-1,8-naphthyridin,     (las     2-Oxy-4-methyl-6-chlor-7-amino-1,8-naphthyridin,     das     2-Oxy-4-methyl-3,6-dichlor-7-amino-1,8-naphthyridin,     das     2-Oxy-4-methyl-6-broin-7-amino-1,8-naphthyridin,     das     2-Oxy-4-methyl-3,6-dibrom-7-amino-1,8-naphthyridin,     das     2-Oxy-4-inethyl-6-jod-7-amino-1,8-naphthyridin    und  das     2-Oxy-4-methyl-3,6-dijod-7-amino-1,8-naphthyridin.         Gegenstand des Patentes ist ein Verfahren       zurr    Darstellung eines neuen Derivates des       Naphthyridins,

      welches dadurch gekennzeich  net     ist,    dass man auf     2,4-Dimethyl-7-amino-          1,8-naphthyridin    Chlor     einwirken    lässt, so dass  sich     2,4-Dimethyl-6-chlor-7-amino-1,8-naph-          thyridin    bildet.  



  <I>Beispiel:</I>  In eine Lösung von 50 g     2,4-Dimethyl-7-          amino-1,8-naphthyriain    in 750     cm3    Eisessig       wird    getrocknetes Chlorgas so lange eingelei  tet, bis das Gewicht des Reaktionsgemisches  um 22,5 g zugenommen hat. Dabei wird durch       Kühlen    dafür gesorgt, dass die Temperatur  des Gemisches 200 C     nicht    übersteigt.

   Der ent  standene Niederschlag wird     abgenutscht,    in  Wasser     suspendiert,    die     Suspension    bis     zur          alkalischen    Reaktion     mit        Sodalösung    versetzt  und der Niederschlag abermals     abgenutscht.     Das so erhaltene     2,4-Dimethyl-6-chlor-7-amino-          1,8-naphthyridin    wird aus wässerigem Aceton       umkristallisiert.    Es bildet hellgelbe, geruch  lose, bei 134  C     schmelzende    Prismen, die gut  löslich sind in konzentrierter Salzsäure, kal  tem Aceton, Benzol und kochendem Äthanol,

    mässig gut     löslich    in kaltem Äthanol, wenig    löslich in Äther     und        umlöslich    in Wasser.  Ausbeute: 49 g.  



  Das neue     Naphthyridinderivat    lässt sich  auch in Form seiner Salze, z. B.     als        salzsaures     Salz,     isolieren.  



  Process for the preparation of a new derivative of naphthyridine. It was found that compounds of the general formula
EMI0001.0003
    wherein R, the llethyl or the hydroxyl group, R "the amino or an alkoxy group, z.

   B. butoxy group, R3 is a halogen or a hydrogen atom and R4 is a halogen atom, a surprisingly good effectiveness against small organisms such as bacteria, amoebas, protozoa, etc., and therefore as a disinfectant both for objects and for the living body per, are particularly valuable as wound and intestinal disinfectants.

   They can be processed in the form of powders, solutions or sprays, emulsions, suspensions, pastes, ointments, powders, etc., for rubbing in, taking in, injecting, spraying, impregnating, etc. used.



  The new compounds can in a number of ways by halogenation of compounds of the general formula
EMI0001.0023
    in which R., and R. 2 have the abovementioned meaning, are obtained, with one or two halogen atoms entering the molecule depending on the reaction conditions.

      The following have proven to be particularly effective: 2,4-dimethyl-6-chloro-7-amino-1,8-naphthyridine with a melting point of 1340, 2,4-dimethyl-1-6-chloro-7- (n -butoxy) -1,8-naphthyridine of m.p. 770 and the 2,4-dimethyl-3,6-dichloro-7- (n-butoxy) -1,8-naphthyridine of m.p. 137 to 1390. Good activity also show: 2,4-dimethyl-3,6-dichloro-7-amino-1,8-naphthyridine, 2,4-diinethyl-6-bromo-7-amino-1,8-naphthyridine, the 2, 4-dimethyl-3,6-dibromo-7-amino-1,8-naphthiyridine,.

    2,4-dimethyl-6-iodo-7-amino-1,8-naphthyridine, 2,4-dimethyl-3,6-diiodo-7-amino-1,8-naphthyridine, (read 2-oxy- 4-methyl-6-chloro-7-amino-1,8-naphthyridine, 2-oxy-4-methyl-3,6-dichloro-7-amino-1,8-naphthyridine, 2-oxy-4- methyl-6-broin-7-amino-1,8-naphthyridine, 2-oxy-4-methyl-3,6-dibromo-7-amino-1,8-naphthyridine, 2-oxy-4-ynethyl 6-iodo-7-amino-1,8-naphthyridine and 2-oxy-4-methyl-3,6-diiodo-7-amino-1,8-naphthyridine The subject of the patent is a process for the preparation of a new derivative of naphthyridine,

      which is characterized in that chlorine is allowed to act on 2,4-dimethyl-7-amino-1,8-naphthyridine, so that 2,4-dimethyl-6-chloro-7-amino-1,8-naph - forms thyridine.



  <I> Example: </I> In a solution of 50 g of 2,4-dimethyl-7-amino-1,8-naphthyriaine in 750 cm3 of glacial acetic acid, dried chlorine gas is introduced until the weight of the reaction mixture has decreased by 22, Has gained 5 g. It is ensured by cooling that the temperature of the mixture does not exceed 200 C.

   The resulting precipitate is filtered off with suction, suspended in water, soda solution is added to the suspension until it has an alkaline reaction, and the precipitate is filtered off again with suction. The 2,4-dimethyl-6-chloro-7-amino-1,8-naphthyridine thus obtained is recrystallized from aqueous acetone. It forms light yellow, odorless prisms that melt at 134 C and are readily soluble in concentrated hydrochloric acid, cold acetone, benzene and boiling ethanol.

    moderately soluble in cold ethanol, slightly soluble in ether and insoluble in water. Yield: 49 g.



  The new naphthyridine derivative can also be used in the form of its salts, e.g. B. as hydrochloric acid salt, isolate.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen Derivates des Naphthyridins, dadurch ge kennzeichnet, dass man auf 2,4-Dimethyl-7- amino-1,8-naphthyridin Chlor einwirken lässt, so dass 2,4-Dimethyl-6-ehlor-7-amino-1,8-naph- thyridin entsteht. . Das Verfahrensprodukt bildet hellgelbe, geruchlose, bei 1340 C schmelzende Prismen (aus wässerigem Aceton), die gut löslich sind in konzentrierter Salzsäure, kaltem Aceton, Benzol und kochendem Äthanol, mässig gut löslich in kaltem Äthanol, wenig löslich in Äther und unlöslich in Wasser. PATENT CLAIM: Process for the preparation of a new derivative of naphthyridine, characterized in that chlorine is allowed to act on 2,4-dimethyl-7-amino-1,8-naphthyridine, so that 2,4-dimethyl-6-chloro-7 -amino-1,8-naphthyridine is formed. . The product of the process forms pale yellow, odorless prisms (made from aqueous acetone) that melt at 1340 C, which are readily soluble in concentrated hydrochloric acid, cold acetone, benzene and boiling ethanol, moderately soluble in cold ethanol, slightly soluble in ether and insoluble in water. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet; dass man das Chlor auf in Eisessig gelöstes 2,4-Dimethyl-7-amino-1,8- naphthyridin einwirken lässt. SUBClaim: Method according to claim, characterized in that; that the chlorine is allowed to act on 2,4-dimethyl-7-amino-1,8-naphthyridine dissolved in glacial acetic acid.
CH263148D 1947-09-12 1947-09-12 Process for the preparation of a new derivative of naphthyridine. CH263148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH263148T 1947-09-12

Publications (1)

Publication Number Publication Date
CH263148A true CH263148A (en) 1949-08-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CH263148D CH263148A (en) 1947-09-12 1947-09-12 Process for the preparation of a new derivative of naphthyridine.

Country Status (1)

Country Link
CH (1) CH263148A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040820A2 (en) * 2006-10-06 2008-04-10 Basf Se Fungicidal n-heteroaryl-condensed pyridine derivatives and fungicidal compositions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040820A2 (en) * 2006-10-06 2008-04-10 Basf Se Fungicidal n-heteroaryl-condensed pyridine derivatives and fungicidal compositions
WO2008040820A3 (en) * 2006-10-06 2008-06-26 Basf Se Fungicidal n-heteroaryl-condensed pyridine derivatives and fungicidal compositions

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