CH310245A - Process for making a pyridazone. - Google Patents

Process for making a pyridazone.

Info

Publication number
CH310245A
CH310245A CH310245DA CH310245A CH 310245 A CH310245 A CH 310245A CH 310245D A CH310245D A CH 310245DA CH 310245 A CH310245 A CH 310245A
Authority
CH
Switzerland
Prior art keywords
phenyl
pyridazon
pyridazone
dimethylamine
making
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH310245A publication Critical patent/CH310245A/en

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Description

  

  Verfahren zur Herstellung     eines        Pyridazons.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung von     6-Di-          methylamino-2-phenyl-pyridazon-(3)    der For  mel  
EMI0001.0005     
    Die neue Verbindung wird erhalten, wenn  man     2-Phenyl-pyridazon-(3),    das in     6-Stellung     einen austauschfähigen     Substituenten9aufweist,     mit     Dimethylamin    umsetzt. Ein     austausch-          fähiger        Substituent    ist z.

   B. ein Halogen-, ins  besondere ein Chloratom, oder auch eine sub  stituierte     Oxy-,    wie     Phenoxy-,    oder     Mercapto-,     wie     Methylmercaptogruppe.     



  Die Reaktion     kann    in An oder Abwesen  heit von Verdünnungsmitteln und/oder Kon  densationsmitteln     undloder    Katalysatoren im  offenen oder     geschlossenen    Gefäss unter Druck  durchgeführt werden.  



  Das     Verfahrensprodukt,    das     6-Dimethyl-          amino-2-phenyl-pyridazon-(3)    vom F. = 130  bis 132 , ist neu. Es zeigt eine     antipyretische     und     analgetische        Wirkung    und soll als Heil  mittel     Verwendung    finden.

      <I>- Beispiel:</I>  10,3     Gewichtsteile        2-Phenyl-6-chlor-pyrid-          azon-(3)    werden mit einer 20     Gewichtsteile        Di-          methylamin        enthaltenden        31,    5     %        igen        äthyl-          alkoholischen        Dimethylaminlösung    im geschlos  senen Gefäss 6 Stunden auf 150-155  erhitzt.

    Nach dem Erkalten     nutscht    man das aus  kristallisierte     Produkt    ab und     kristallisiert    es  mehrmals aus     Benzol-Petroläther        um.    Das so  erhaltene     6-Dimethylamino-2-phenyl-pyridazon-          (3)    schmilzt bei 130-132 .



  Process for making a pyridazone. The subject of the present patent is a process for the preparation of 6-dimethylamino-2-phenyl-pyridazon- (3) of the formula
EMI0001.0005
    The new compound is obtained when 2-phenyl-pyridazon- (3), which has an exchangeable substituent 9 in the 6-position, is reacted with dimethylamine. An exchangeable substituent is e.g.

   B. a halogen, in particular a chlorine atom, or a sub-substituted oxy, such as phenoxy, or mercapto, such as methyl mercapto group.



  The reaction can be carried out in the presence or absence of diluents and / or condensation agents and / or catalysts in an open or closed vessel under pressure.



  The product of the process, 6-dimethylamino-2-phenyl-pyridazon- (3) with a melting point of 130 to 132, is new. It has an antipyretic and analgesic effect and is said to be used as a medicinal product.

      <I> - Example: </I> 10.3 parts by weight of 2-phenyl-6-chloropyridazon- (3) are closed with a 31.5% strength ethyl alcoholic dimethylamine solution containing 20 parts by weight of dimethylamine Vessel heated to 150-155 for 6 hours.

    After cooling, the product which has crystallized out is filtered off with suction and recrystallized several times from benzene petroleum ether. The 6-dimethylamino-2-phenyl-pyridazon- (3) obtained in this way melts at 130-132.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Pyrid- azons, dadurch gekennzeichnet, dass man 2- Phenyl-pyridazon- (3) , das in 6-Stellung einen austauschfähigen Substituenten aufweist, mit Dimethylamin umsetzt. Das Verfahrensprodukt, das 6-Dimethyl- amino-2-phenyl-pyridazon-(3) vom F. = 130 bis 132 , ist neu. Claim: Process for the production of a pyridazone, characterized in that 2-phenyl-pyridazon- (3), which has an exchangeable substituent in the 6-position, is reacted with dimethylamine. The product of the process, 6-dimethylamino-2-phenyl-pyridazon- (3) with a melting point of 130 to 132, is new. Es soll als Heilmittel Ver- wendiuwg finden. UNTERANSPRÜCHE: 1. Verfahren nach Patentanspruch, da durch gekennzeichnet, da.ss man 2-Phenyl-6- halogen-pyridazon-(3) mit Dimethylamin tun- setzt. 2. Verfahren nach Patentanspruch und Unteranspruch 1, dadurch gekennzeichnet, dass man 2-Phenyl-6-chlor-pyridazon-(3) mit Di- methylamin umsetzt. It is said to be used as a remedy. SUBClaims: 1. Method according to claim, characterized in that 2-phenyl-6-halo-pyridazon- (3) is done with dimethylamine. 2. The method according to claim and dependent claim 1, characterized in that 2-phenyl-6-chloro-pyridazon- (3) is reacted with dimethylamine.
CH310245D 1952-06-20 1952-06-20 Process for making a pyridazone. CH310245A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH310245T 1952-06-20

Publications (1)

Publication Number Publication Date
CH310245A true CH310245A (en) 1955-10-15

Family

ID=4494116

Family Applications (1)

Application Number Title Priority Date Filing Date
CH310245D CH310245A (en) 1952-06-20 1952-06-20 Process for making a pyridazone.

Country Status (1)

Country Link
CH (1) CH310245A (en)

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