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, 17 (18), 5041-8

Enantiopure Five-Membered Cyclicdiamine Derivatives as Potent and Selective Inhibitors of Factor Xa. Improving in Vitro Metabolic Stability via Core Modifications

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Enantiopure Five-Membered Cyclicdiamine Derivatives as Potent and Selective Inhibitors of Factor Xa. Improving in Vitro Metabolic Stability via Core Modifications

Jennifer X Qiao et al. Bioorg Med Chem Lett.

Abstract

We previously reported a series of enantiopure cis-(1R,2S)-cyclopentyldiamine derivatives as potent and selective inhibitors of Factor Xa (FXa). Herein, we describe our approach to improve the metabolic stability of this series via core modifications. Multiple resulting series of compounds demonstrated similarly high FXa potency and improved metabolic stability in human liver microsomes compared with the cyclopentyldiamide 1. (3R,4S)-Pyrrolidinyldiamide 31 was the best overall compound with human FXa K(i) of 0.50 nM, PT EC(2x) of 2.1 microM in human plasma, bioavailability of 25% and t(1/2)of 2.7h in dogs. Further biochemical characterization of compound 31 is also presented.

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