1-Arylnaphthalene Lignan: A Novel Scaffold for Type 5 Phosphodiesterase Inhibitor
作者:Tatsuzo Ukita、Yoshinori Nakamura、Akira Kubo、Yasuo Yamamoto、Masami Takahashi、Jun Kotera、Tomohiro Ikeo
DOI:10.1021/jm9807048
日期:1999.4.1
1-Arylnaphthalene lignan, which had been reported as a PDE4 inhibitor by Iwasaki, was disclosed as a new structural class of PDE5 inhibitors. The structural requirements for potent and specific PDE5 inhibition were revealed in a 1-arylnaphthalene lignan series, in which 1-(3-bromo-4, 5-dimethoxyphenyl)-5-chloro-3-[4-(2-hydroxyethyl)-1-piperazinylcarbonyl]-2-(methoxycarbonyl)naphthalene hydrochloride (27q) showed the most potent and specific inhibition (PDE5 inhibition IC50 = 6.2 nM, selectivity for PDE5 against PDE1, -2, -3, and -4 > 16 000). It is noteworthy that 27q has the best selectivities against PDE isoforms among PDE5 inhibitors so far reported. Compound 27q exhibited almost the same relaxant effects on rat aortic rings as sodium 1-[6-chloro-4-[(3,4-methylenedioxybenzyl)amino]quinazolin-2-yl]piperidine-4-carboxylate (35) (27q, EC50 = 0.10 mu M; 35, EC50 = 0.20 mu M) and was selected for further biological evaluation.