1. Academic Validation
  2. Discovery of 2-[1-(4-chlorophenyl)cyclopropyl]-3-hydroxy-8-(trifluoromethyl)quinoline-4-carboxylic acid (PSI-421), a P-selectin inhibitor with improved pharmacokinetic properties and oral efficacy in models of vascular injury

Discovery of 2-[1-(4-chlorophenyl)cyclopropyl]-3-hydroxy-8-(trifluoromethyl)quinoline-4-carboxylic acid (PSI-421), a P-selectin inhibitor with improved pharmacokinetic properties and oral efficacy in models of vascular injury

  • J Med Chem. 2010 Aug 26;53(16):6003-17. doi: 10.1021/jm9013696.
Adrian Huang 1 Alessandro Moretto Kristin Janz Michael Lowe Patricia W Bedard Steve Tam Li Di Valerie Clerin Natalia Sushkova Boris Tchernychev Desiree H H Tsao James C Keith Gray D Shaw Robert G Schaub Qin Wang Neelu Kaila
Affiliations

Affiliation

  • 1 Pfizer Global Research and Development, 200 Cambridge Park Drive, Cambridge, Massachusetts 02140, USA.
Abstract

Previously, we reported the discovery of PSI-697 (1a), a C-2 benzyl substituted quinoline salicylic acid-based P-selectin Inhibitor. It is active in a variety of animal models of Cardiovascular Disease. Compound 1a has also been shown to be well tolerated and safe in healthy volunteers at doses of up to 1200 mg in a phase 1 single ascending dose study. However, its oral bioavailability was low. Our goal was to identify a back up compound with equal potency, increased solubility, and increased exposure. We expanded our structure-activity studies in this series by branching at the alpha position of the C-2 benzyl side chain and through modification of substituents on the carboxylic A-ring of the quinoline. This resulted in discovery of PSI-421 with marked improvement in aqueous solubility and pharmacokinetic properties. This compound has shown oral efficacy in animal models of arterial and venous injury and was selected as a preclinical development compound for potential treatment of such diseases as atherosclerosis and deep vein thrombosis.

Figures