Importance

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Abstract

This invention concerns a compound of generic formula: ##STR1## or a pharmaceutically acceptable salt thereof, where the dotted lines represent optional bonds, R.sup.3 is an optionally substituted C.sub.6 -C.sub.10 aryl or heteroaryl group; optionally substituted by one or more substituents the same or different, R' represents one or more optional substituents the same or different, selected from the following: halogen, C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.7 alkoxycarbonyl, C.sub.1 -C.sub.6 hydroxyalkyl, CN, aminocarbonyl, C.sub.2 -C.sub.7 alkanoyloxy(C.sub.1 -C.sub.6 )alkyl, carboxy, C.sub.2 -C.sub.7 alkanoxylamino, optionally substituted C.sub.6 -C.sub.10 or heteroaryl or an optionally substituted (C.sub.6 -C.sub.10 aryl)alkyl or a heteroaryl alkyl radical; and R' represents one or more optional mono- or di- valent substituents in the 5, 7 or 8 positions the same or different: monovalent substituents being selected from the following: C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.7 alkanoyloxy, hydroxy, amino, C.sub.2 -C.sub.7 alkanoylamino, C.sub.1 -C.sub.6 alkylamino, C.sub.1 -C.sub.6 hydroxalkyl, C.sub.7 -C.sub.17 aralkyloxyamino, R' can also represent hydroxy in the 6 position (when the optional bond is absent); the di-valent substituents being selected from oxo (i.e .dbd.O) and methylene (i.e .dbd.CH.sub.2); and the N-oxides thereof, which compounds have pharmaceutical uses conferred by their ability to block voltage gated potassium channels.

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First Claim