Design, synthesis and biological activity of amidinobicyclic compounds (derivatives of DX-9065a) as factor Xa inhibitors: SAR study of S1 and aryl binding sites.
Since factor Xa (fXa) plays a pivotal role in the blood coagulation cascade, inhibition of fXa is thought to be an effective treatment for a variety of thrombotic events. (2S)-2-[4-[[(3S)-1-Acetimidoyl-3-pyrrolidinyl]oxy]phenyl]-3-(7-amidino-2-naphthyl)propanoic acid hydrochloride pentahydrate (DX-9065a) was previously found in our laboratory as a novel orally active factor Xa inhibitor. DX-9065a exhibits a strong inhibitory activity toward fXa by occupying the substrate recognition (called S1) sites and aryl binding sites of fXa. Herein we describe conversions of the amidinonaphthalene and the acetimidoylpyrrolidine moieties of DX-9065a. Some compounds showed remarkably increased in vitro anti-factor Xa and PRCT activities compared with those of DX-9065a. The most promising compound 38 showed four times the prolongation of APTT against DX-9065a after oral administration to rats.
Komoriya
Satoshi
S
Tokyo R&D Center, Daiichi Pharmaceutical Co. Ltd, 16-13, Kita-Kasai 1-Chome, Edogawa-ku, Tokyo 134-8630, Japan. komor0ni@daiichipharm.co.jp
Kanaya
Naoaki
N
Nagahara
Takayasu
T
Yokoyama
Asako
A
Inamura
Kazue
K
Yokoyama
Yukio
Y
Katakura
Shin-ichi
S
Hara
Tsuyoshi
T
D000818:Animals; D000925:Anticoagulants / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D001665:Binding Sites; D065427:Factor Xa Inhibitors; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D009281:Naphthalenes / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D011422:Propionates / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013329:Structure-Activity Relationship
C086910:(2S)-2-(4-(((3S)-1-acetimidoyl-3-pyrrolidinyl)oxy)phenyl)-3-(7-amidino-2-naphtyl)propanoic acid; D000925:Anticoagulants; D065427:Factor Xa Inhibitors; D009281:Naphthalenes; D011422:Propionates