Journal
BIOORGANIC & MEDICINAL CHEMISTRY
Volume 12, Issue 9, Pages 2295-2306Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2004.02.004
Keywords
CCR5 antagonist; chemokine; HIV-1; N,N '-diphenylurea
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We have previously reported the novel lead compound 1a as a CCR5 antagonist for treatment of HIV-1 infection. SAR studies on incorporating various acyl groups as a replacement for the 5-oxopyrrolidine-3-carbonyl group of the lead structure resulted in the discovery of N-[3-(4-benzylpiperidin-1-yl)propyl]-N,N-1-diphenylurea (4a) with significantly improved CCR5 binding affinity. Substitutions (4-Cl, 4e,f; 4-Me, 4i) on the N'-phenyl ring further increased the binding affinity. Introduction of polar substituents on the phenyl ring of the 4-benzylpiperidine moiety enhanced the inhibitory activity of the HIV-1 envelope-mediated membrane fusion (4v,w), suggesting that polar substituents at this position can interfere effectively with HIV-1 cell entry. (C) 2004 Elsevier Ltd. All rights reserved.
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