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

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-alkanoy-loxy, amino, C1-C6-alkylamino, di-C1-C6-alkylamino, C2-C6-alka-noylamino, C2-C6-alkanoyl-C1-C6...

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Bibliographische Detailangaben
Hauptverfasser: ENGEL, JUERGEN, SCHEFFLER, GERHARD
Format: Patent
Sprache:eng ; fre
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Zusammenfassung: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-alkanoy-loxy, amino, C1-C6-alkylamino, di-C1-C6-alkylamino, C2-C6-alka-noylamino, C2-C6-alkanoyl-C1-C6-alkylamino or a nitro group, R2 represents hydrogen or has one of the meanings 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, benzoyloxy or C2-C6-alkanoyloxy and A represent 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.