4-BENZYL-1-2(H)-PHTHALAZINONE DERIVATIVES

4-BENZYL-1-2(H)-PHTHALAZINONE DERIVATIVES

There are provided 4-benzyl-1-(2H)-phthalazinone derivatives having antiallergic activity of the formula I wherein R1 represents fluorine, chlorine, bromine, trifluoromethyl, C1-C6-alkyl, hydroxy, C1-C6-alkoxy, C2-C6-alkanoyloxy, amino, C1-C6-alkylamino, di-C1-C6-alkylamino, C2-C6-alkanoylamino, C2-...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ENGEL, JUERGEN, SCHEFFLER, GERHARD
Format: Patent
Sprache:eng ; ger
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
ORGANIC CHEMISTRY
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS
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Beschreibung
Zusammenfassung:There are provided 4-benzyl-1-(2H)-phthalazinone derivatives having antiallergic activity of the formula I wherein R1 represents fluorine, chlorine, bromine, trifluoromethyl, C1-C6-alkyl, hydroxy, C1-C6-alkoxy, C2-C6-alkanoyloxy, amino, C1-C6-alkylamino, di-C1-C6-alkylamino, C2-C6-alkanoylamino, C2-C6-alkanoyl-C1-C6-alkylamino or a nitro group, R2 represents hydrogen or has one of the meanings given for R1, whereby R1 and R2 may be the same or different, the radicals R3 and R4 are the same or different and represent hydrogen, halogen, C1-C6-alkyl, hydroxy, C1-C6-alkoxy, benzyloxy or C2-C6-alkanoyloxy and A represents an azacycloalkanyl radical, the aza nitrogen of which contains a C1-C6-alkyl group which is substituted by various radicals, and processes for their manufacture.