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• W1982020111 abstract "A new class of nonpeptidic inhibitors of the ZnII-dependent metalloprotease neprilysin with IC50 values in the nanomolar activity range (0.034–0.30 μM) were developed based on structure-based de novo design (Figs. 1 and 2). The inhibitors feature benzimidazole and imidazo[4,5-c]pyridine moieties as central scaffolds to undergo H-bonding to Asn542 and Arg717 and to engage in favorable π-π stacking interactions with the imidazole ring of His711. The platform is decorated with a thiol vector to coordinate to the ZnII ion and an aryl residue to occupy the hydrophobic S1′ pocket, but lack a substituent for binding in the S2′ pocket, which remains closed by the side chains of Phe106 and Arg110 when not occupied. The enantioselective syntheses of the active compounds (+)-1, (+)-2, (+)-25, and (+)-26 were accomplished using Evans auxiliaries (Schemes 2, 4, and 5). The inhibitors (+)-2 and (+)-26 with an imidazo[4,5-c]pyridine core are ca. 8 times more active than those with a benzimidazole core ((+)-1 and (+)-25) (Table 1). The predicted binding mode was established by X-ray analysis of the complex of neprilysin with (+)-2 at 2.25-Å resolution (Fig. 4 and Table 2). The ligand coordinates with its sulfanyl residue to the ZnII ion, and the benzyl residue occupies the S1′ pocket. The 1H-imidazole moiety of the central scaffold forms the required H-bonds to the side chains of Asn542 and Arg717. The heterobicyclic platform additionally undergoes π-π stacking with the side chain of His711 as well as edge-to-face-type interactions with the side chain of Trp693. According to the X-ray analysis, the substantial advantage in biological activity of the imidazo-pyridine inhibitors over the benzimidazole ligands arises from favorable interactions of the pyridine N-atom in the former with the side chain of Arg102. Unexpectedly, replacement of the phenyl group pointing into the deep S1′ pocket by a biphenyl group does not enhance the binding affinity for this class of inhibitors." @default.
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• W1982020111 date "2005-04-01" @default.
• W1982020111 modified "2023-10-04" @default.
• W1982020111 title "Second-Generation Inhibitors for the Metalloprotease Neprilysin Based on Bicyclic Heteroaromatic Scaffolds: Synthesis, Biological Activity, and X-Ray Crystal-Structure Analysis" @default.
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• W1982020111 doi "https://doi.org/10.1002/hlca.200590051" @default.
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