Journal
BIOORGANIC & MEDICINAL CHEMISTRY
Volume 16, Issue 18, Pages 8607-8618Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2008.08.006
Keywords
allergic diseases; CCR3 antagonists; CYP2D6 inhibition
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In our previous study on discovering novel types of CCR3 antagonists, we found a fluoronaphthalene derivative (1) that exhibited potent CCR3 inhibitory activity with an IC(50) value of 20 nM. However, compound 1 also inhibited human cytochrome P450 2D6 (CYP2D6) with an IC(50) value of 400 nM. In order to reduce its CYP2D6 inhibitory activity, we performed further systematic structural modi. cations on 1. In particular, we focused on reducing the number of lipophilic moieties in the biphenyl part of 1, using Clog D(7.4) values as the reference index of lipophilicity. This research led to the identification of N-{(3-exo)-8-[(6-fluoro-2-naphthyl)methyl]-8-azabicyclo[3.2.1]oct-3-yl}-3-(piperidin-1-ylcarbonyl)isonicotinamide 1-oxide (30) which showed comparable CCR3 inhibitory activity (IC(50) = 23 nM) with much reduced CYP2D6 inhibitory activity (IC50 = 29,000 nM) compared with 1. (C) 2008 Elsevier Ltd. All rights reserved.
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