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ID: ALA3400104
Journal: Bioorg Med Chem
Title: Discovery of a potent, orally available dual CysLT₁ and CysLT₂ antagonist with dicarboxylic acid.
Authors: Itadani S, Takahashi S, Ima M, Sekiguchi T, Aratani Y, Egashira H, Matsumura N, Inoue A, Yonetomi Y, Fujita M, Nakayama Y, Takeuchi J.
Abstract: A potent, orally available dual CysLT₁ and CysLT₂ receptor antagonist with a dicarboxylic acid is described. 4-(3-(Carboxymethyl)-4-{(E)-2-[4-(4-phenoxybutoxy)phenyl]vinyl}-1H-indol-1-yl)butanoic acid (15: ONO-4310321, IC₅₀: CysLT₁=13nM, CysLT₂=25 nM) showed excellent pharmacokinetic profiles (%Frat=100) compared with our previously reported compound 1 (%Frat=1.5). In addition, we describe a new rule for dicarboxylic acid derivatives to show good oral bioavailability (%Frat⩾40) in rats (HBDs: ⩽2, ClogP: >6.5 and TPSA: <100). Especially, reduction of only one hydrogen-bond donor (HBDs) showed dramatically improved oral bioavailability. This small change of HBDs in dicarboxylic acid derivatives is generally a very effective modification.
CiteXplore: 25800431