Discovery of sulfonylalkylamides: A new class of orally active factor Xa inhibitors.
Factor Xa (FXa) is a trypsin-like serine protease involved in the coagulation cascade and has received great interest as a potential target for the development of new antithrombotic agents. Most of amidine-type FXa inhibitors reported have been found to show extremely poor oral bioavailability. Compound 1 is one of the first reported non-amidine type FXa inhibitors. To discover novel and orally active FXa inhibitors, we investigated flexible linear linkers between the 6-chloronaphthalene ring and the 1-(pyridin-4-yl)piperidine moiety of 1 and found the orally active sulfonylalkylamide 2f with an FXa IC(50) of 0.05 microM, comparable with that of 1. Further modification to reduce the CYP3A4 inhibitory activity of 2f resulted in the potent, selective, and orally active 2-methylpyridine analogue 2s (FXa IC(50) of 0.061 microM), for which the liability of CYP3A4 inhibition was significantly weakened compared to 2f. Compound 2s also showed long lasting anticoagulant activity in cynomolgus monkeys.
Imaeda
Yasuhiro
Y
Pharmaceutical Research Division, Takeda Pharmaceutical Co., Ltd, 2-17-85, Jusohonmachi, Yodogawa-ku, Osaka 532-8686, Japan.
Miyawaki
Toshio
T
Sakamoto
Hiroki
H
Itoh
Fumio
F
Konishi
Noriko
N
Hiroe
Katsuhiko
K
Kawamura
Masaki
M
Tanaka
Toshimasa
T
Kubo
Keiji
K
D000284:Administration, Oral; D000478:Alkylation; D000577:Amides / Q000008:administration & dosage* / Q000138:chemical synthesis* / Q000737:chemistry / Q000145:classification; D000818:Animals; D000990:Antithrombin III / Q000008:administration & dosage* / Q000138:chemical synthesis* / Q000737:chemistry / Q000145:classification; D003432:Cross-Linking Reagents / Q000737:chemistry; D065607:Cytochrome P-450 Enzyme Inhibitors; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism; D015951:Factor Xa / Q000737:chemistry / Q000378:metabolism; D065427:Factor Xa Inhibitors; D000882:Haplorhini; D006801:Humans; D051379:Mice; D008958:Models, Molecular; D015394:Molecular Structure; D011485:Protein Binding; D013329:Structure-Activity Relationship; D013457:Sulfur Compounds / Q000008:administration & dosage* / Q000138:chemical synthesis* / Q000737:chemistry / Q000145:classification
D000577:Amides; D003432:Cross-Linking Reagents; D065607:Cytochrome P-450 Enzyme Inhibitors; D065427:Factor Xa Inhibitors; D013457:Sulfur Compounds; D000990:Antithrombin III; D003577:Cytochrome P-450 Enzyme System; D015951:Factor Xa