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
Links
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)
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) |
-
1952
- 1952-06-20 CH CH310245D patent/CH310245A/en unknown
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