Abstract:
:The bradykinin B1 receptor is rapidly induced upon tissue injury and inflammation, stimulating the production of inflammatory mediators resulting in plasma extravasation, leukocyte trafficking, edema, and pain. We have previously reported on sulfonamide and sulfone-based B1 antagonists containing a privileged bicyclic amine moiety leading to potent series of 2-oxopiperazines. The suboptimal pharmacokinetics and physicochemical properties of the oxopiperazine sulfonamides led us to seek B1 antagonists with improved druglike properties. Using a pharmacophore model containing a bicyclic amine as anchor, we designed a series of amide antagonists with targeted physicochemical properties. This approach led to a novel series of potent phthalazinone B1 antagonists, where we successfully replaced a sulfonamide acceptor with a cyclic carbonyl unit. SAR studies revealed compounds with subnanomolar B1 binding affinity. These compounds demonstrate excellent cross-species PK properties with high oral bioavailability and potent activity in a rabbit biochemical challenge pharmacodynamic study.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Biswas K,Peterkin TA,Bryan MC,Arik L,Lehto SG,Sun H,Hsieh FY,Xu C,Fremeau RT,Allen JRdoi
10.1021/jm200808vsubject
Has Abstractpub_date
2011-10-27 00:00:00pages
7232-46issue
20eissn
0022-2623issn
1520-4804journal_volume
54pub_type
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