Pyrido(2,3-b)pyrazine derivatives

C - Chemistry – Metallurgy – 07 – D

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C07D 471/04 (2006.01) A61K 31/495 (2006.01) A61K 31/535 (2006.01) A61K 31/54 (2006.01) A61K 31/695 (2006.01) C07D 519/00 (2006.01) C07F 7/10 (2006.01)

Patent

CA 2241690

Compounds of formula (I), wherein R1 is pyridyl(lower)alkyl, N- oxidopyridyl(lower)alkyl or imidazolyl(lower)alkyl; R2 is aminophenyl, [protected amino]phenyl, [[[halophenyl](lower)alkenoyl]amino]phenyl, [[pyridyl(lower)alkenoyl]amino]phenyl, [[[N-oxidopyridyl](lower)alkenoyl]- amino]phenyl, [[[protected aminopyridyl](lower)alkenoyl]amino]-phenyl, [thiazolylcarbonylamino]phenyl which may have pyridyl, naphthyl having lower alkoxy and halogen, [dihalophenyl](lower)alkenyl, [N- oxidopyridyl](lower)alkenyl, [aminopyridyl](lower)alkenyl, [protected aminopyridyl](lower)alkenyl, [carboxypyridyl](lower)alkenyl, [protected carboxypyridyl](lower)alkenyl, [[pyridyl(lower)alkenyl]pyridyl](lower)alkenyl, [[carboxy(lower)alkenyl]pyridyl](lower)alkenyl, [[protected carboxy(lower)alkenyl]pyridyl](lower)-alkenyl, [pyridyl(lower)alkenyl]pyridyl, lower alkylbenzothiazolyl or [halopyridylcarbonyl]amino, with proviso that when R2 is [[4-pyridyl(lower)alkenoyl]-amino]phenyl, aminophenyl, [lower alkanoylamino]phenyl or [dihalophenyl](lower)alkenyl, then R1 is N- oxidopyridyl(lower)alkyl or imidazolyl(lower)alkyl, possess a strong phosphodiesterase IV (PDE IV)-inhibitory activity and a strong inhibitory activity on the production of tumor necrosis factor (TNF).

Cette invention concerne des composés correspondant à la formule (I) où R?1¿ représente pyridylalkyle (inférieur), N-oxydopyridylalkyle (inférieur) ou imidazolylalkyle (inférieur); R?2¿ représente aminophényle, [amino protégé]phényle, [[[halophényl]alcénoyl (inférieur)]amino]phényle, [[pyridylalcénoyl (inférieur)]amino]phényle, [[[N-oxydopyridyl]alcénoyl (inférieur)]amino]phényle, [[[aminopyridyl protégé]alcénoyl (inférieur)]amino]phényle, [thiazolylcarbonylamino]phényle pouvant comporter pyridyle, naphtyle possédant un alcoxy inférieur et un halogène, [dihalophényl]alcényle (inférieur), [N-oxydopyridyl]alcényle (inférieur), [aminopyridyl]alcényle (inférieur), [aminopyridyl protégé]alcényle (inférieur), [carboxypyridyl]alcényle (inférieur), [carboxypyridyl protégé]alcényle (inférieur), [[pyridylalcényl (inférieur)]pyridyl]alcényle (inférieur), [[carboxyalcényl (inférieur)]pyridyl]alcényle (inférieur), [[carboxy protégé alcényl (inférieur)]pyridyl]alcényle (inférieur), [pyridylalcényl (inférieur)]pyridyle, alkylbenzothiazolyle inférieur ou [halopyridylcarbonyl]amino, étant entendu que lorsque R?2¿ représente [[4-pyridylalcénoyl (inférieur)]amino]phényle, aminophényle, [alcanoylamino inférieur]phényle ou [dihalophényl]alcényle (inférieur), R?1¿ représente N-oxydopyridylalkyle (inférieur) ou imidazolylalkyle (inférieur). Ces composés possèdent une grande activité inhibitrice de phosphodiestérase IV (PDE IV) ainsi qu'une grande activité inhibitrice de la production de facteur de nécrose tumorale (TNF).

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