RESUMO
Although the S3 pocket of the thrombin active site is lined with lipophilic amino acid residues, the accommodation of polarity within the lipophilic P3 moiety of small molecule inhibitors is possible provided that the polar functionality is capable of pointing away from the binding pocket outwards toward solvent while simultaneously allowing the lipophilic portion of the P3 ligand to interact with the S3 amino acid residues. Manipulation of this motif provided the means to effect optimization of functional potency, in vivo antithrombotic efficacy and oral bioavailability in a series of 3-aminopyrazinone thrombin inhibitors which contained non-charged groups at the P1 position.
Assuntos
Anticoagulantes/síntese química , Transtornos da Coagulação Sanguínea/tratamento farmacológico , Desenho de Fármacos , Pirazinas/síntese química , Trombina/antagonistas & inibidores , Administração Oral , Animais , Anticoagulantes/química , Anticoagulantes/farmacologia , Sítios de Ligação , Disponibilidade Biológica , Cães , Estrutura Molecular , Pirazinas/química , Pirazinas/farmacologia , Ratos , Relação Estrutura-AtividadeRESUMO
A novel 1,3,5-trisubstituted benzamide thrombin inhibitor template was designed via hybridization of a known aminopyridinoneacetamide and a known 1,3,5-trisubstituted phenyl ether. Optimization of this lead afforded a novel potent series of biaryl 1,3,5-trisubstituted benzenes with excellent functional anticoagulant potency.