Potent and orally active ETA selective antagonists with 5,7-diarylcyclopenteno[1,2-b]pyridine-6-carboxylic acid structures
作者:Takashi Yoshizumi、Hirobumi Takahashi、Norikazu Ohtake、Hideki Jona、Yoshiyuki Sato、Hiroyuki Kishino、Toshihiro Sakamoto、Satoshi Ozaki、Hiroyuki Takahashi、Yoshihiro Shibata、Yasuyuki Ishii、Michiyasu Saito、Megumu Okada、Takashi Hayama、Masaru Nishikibe
DOI:10.1016/j.bmc.2004.02.033
日期:2004.5
The synthesis and structure-activity relationships of a series of 5,7-diarylcyclopenteno[1,2-b]pyridine-6-carboxylic acids are described. Our efforts have been focused on modification of the aryl ring at the 5-position and the alkyl substituent at the 2-position of the bottom 4-methoxyphenyl ring in an effort to develop orally available ETA selective antagonists with safer profiles in terms of the P-450 enzyme inhibitory activity. Incorporation of a hydroxymethyl group as an alkyl substituent in methylenedioxyphenyl and 6-dihydrobenzofuran derivatives led to the identification of orally bioavailable ETA selective antagonists 1f and 7f. These compounds also showed not only excellent binding affinity (IC50 < 0.10 nM, more than 800-fold selectivity for the ETA receptor over the ETB receptor) but also sufficient oral bioavailability, 481% and 56%, respectively, in rats. Furthermore, these compounds did not exhibit either competitive or mechanism-based inhibition of human cytochrome P450 enzymes. (c) 2004 Elsevier Ltd. All rights reserved.