Novel 2h-pyridazine-3-one derivatives, pharmaceutical...

C - Chemistry – Metallurgy – 07 – D

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C07D 413/14 (2006.01) A61K 31/50 (2006.01)

Patent

CA 2453917

The invention refers to novel 2H-pyridazine-3-one derivatives of the formula I, pharmaceutical compositions containing the same and a process for the preparation of the active ingredient. The novel compounds possess neuroleptic effect and can be used, primarily, for the treatment of schizophrenia. In formula I, R stands for a hydrogen atom or a C1-4 alkyl group, X and Y represent, independently, a hydrogen atom, a halogen atom or a group of the formula II, with the proviso that one of X and Y means always a group of the formula II, and then the other one stands for a hydrogen atom or a halogen atom, wherein in formula II n has a value of 1 or 2.

L'invention se rapporte à de nouveaux dérivés de 2H-pyridazine-3-one représentés par la formule I, à des compositions pharmaceutiques contenant ces dérivés et à des procédés de préparation de l'ingrédient actif. Ces nouveaux composés possèdent des effets neuroleptiques et peuvent être utilisés, en premier lieu, dans le traitement de la schizophrénie. Dans la formule I, R est un atome d'hydrogène ou un groupe C¿1-4?alkyl, X et Y représentent indépendamment un atome d'hydrogène, un atome d'halogène, ou un groupe de la formule II, à condition que X ou Y représentent toujours un groupe de la formule II et que l'autre élément représente un atome d'hydrogène ou un atome d'halogène, la formule II ayant une valeur égale à 1 ou à 2.

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