1,4-Bis(3-oxo-2,3-dihydropyridazin-6-yl)benzene analogs: potent phosphodiesterase inhibitors and inodilators
摘要:
1,4-Bis(3-oxo-2,3-dihydropyridazin-6-yl)benzene and a series of related bis(azinone) compounds were synthesized. These novel compounds were evaluated for inhibition of the low Km, cAMP-selective, cGMP-inhibited phosphodiesterase (PDE III) derived from cat heart and hemodynamic activity in the ganglion- and beta-blocked anesthetized cat. The most potent PDE III inhibitor of the series was 6-[4-(5-methyl-3-oxo-2,3,4,5-tetrahydropyridazin-6-yl)-phenyl]p yridazin- 3(2H)-one (IC50 = 0.07 microM), which also retained the greatest inotrope and vasodilator (inodilator) potency (ED50 for first derivative of left ventricular pressure (dLVP/dt(max)) = 0.02 mumol/kg, ED15 for 15% fall in perfusion pressure = 0.01 mumol/kg). The structure-activity relationships observed within the bis(azinone) series were consistent with those reported for formally analogous 6-(4-substituted-phenyl)pyridazin-3(2H)-one-based PDE III-inhibiting inodilators with less-extended phenyl substituents (see e.g. Sircar et al. J. Med. Chem. 1987, 30, 1955, Moos et al. J. Med. Chem. 1987, 30, 1963). PDE III inhibitory potency is associated with overall planar topology of the phenylpyridazinone moiety and the presence of two critically separated electronegative centers. A methyl group at the 5-position of a dihydropyridazinone ring leads to enhanced potency. However, the generally higher levels of PDE III inhibitory potency shown by compounds in the bis(azinone) series relative to earlier 6-(4-substituted-phenyl)pyridazin-3(2H)-one derivatives appears to derive from a closer to optimal separation of two interacting points in the inhibitor molecule achieved through the more extended bis(azinone) structure. Correlation between the pharmacological and PDE III inhibitory activities of compounds in the bis(azinone) series provides additional evidence for PDE III being an important mediator of inodilator action.
[EN] PHTHALAZINONE-DERIVATIVES AS PDE4 INHIBITORS<br/>[FR] DERIVES DE PHTALAZINONE UTILISES EN TANT QU'INHIBITEURS DE PDE4
申请人:ALTANA PHARMA AG
公开号:WO2005075457A1
公开(公告)日:2005-08-18
The compounds of a certain formula (1), in which R1, R2, R3, R9 and n have the meanings as given in the description, are novel effective PDE4 inhibitors.
[EN] 2-(PIPERIDIN-4-YL) -4, 5-DIHYDRO-2H-PYRIDAZIN-3-ONE DERIVATIVES AS PDE4 INHIBITORS<br/>[FR] DERIVES DE 2-(PIPERIDIN-4-YL)-4,5-DIHYDRO-2H-PYRIDAZIN-3-ONE INHIBITEURS DE PDE4
申请人:ALTANA PHARMA AG
公开号:WO2005075456A1
公开(公告)日:2005-08-18
The compounds of a certain formula (1), in which R1, R2, R3 and R9 have the meanings as given in the description, are novel effective PDE4 inhibitors.
Piperidine-pyridazones and phthalazones as pde4 inhibitors
申请人:Sterk Geert Jan
公开号:US20060094710A1
公开(公告)日:2006-05-04
The compounds of a certain formula 1, in which the given substituents have the meanings as indicated in the description, are novel effective PDE4 inhibitors.
The compounds of a certain formula (1),
in which the given substituents have the meanings as given in the description, are novel effective PDE4 or PDE3/4 inhibitors.