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J Med Chem. 2011 Aug 25;54(16):5868-77. doi: 10.1021/jm2006035. Epub 2011 Jul 22.

Design and discovery of a selective small molecule κ opioid antagonist (2-methyl-N-((2'-(pyrrolidin-1-ylsulfonyl)biphenyl-4-yl)methyl)propan-1-amine, PF-4455242).

Author information

  • 1Neuroscience Medicinal Chemistry, Pfizer PharmaTherapeutics Research and Development, Groton, Connecticut, USA. patrick.r.verhoest@pfizer.com

Abstract

By use of parallel chemistry coupled with physicochemical property design, a series of selective κ opioid antagonists have been discovered. The parallel chemistry strategy utilized key monomer building blocks to rapidly expand the desired SAR space. The potency and selectivity of the in vitro κ antagonism were confirmed in the tail-flick analgesia model. This model was used to build an exposure-response relationship between the κ K(i) and the free brain drug levels. This strategy identified 2-methyl-N-((2'-(pyrrolidin-1-ylsulfonyl)biphenyl-4-yl)methyl)propan-1-amine, PF-4455242, which entered phase 1 clinical testing and has demonstrated target engagement in healthy volunteers.

PMID:
21744827
DOI:
10.1021/jm2006035
[PubMed - indexed for MEDLINE]
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