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Bioorg Med Chem Lett. 2006 May 1;16(9):2380-6. Epub 2006 Feb 14.

Design and synthesis of potent beta-secretase (BACE1) inhibitors with P1' carboxylic acid bioisosteres.

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  • 1Department of Medicinal Chemistry, Center for Frontier Research in Medicinal Science and 21st Century COE Program, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8412, Japan.

Abstract

Recently, we reported potent and small-sized beta-secretase (BACE1) inhibitors KMI-420 and KMI-429 in which we replaced the Glu residue at the P4 position of KMI-260 and KMI-360, respectively, with a 1H-tetrazole-5-carbonyl DAP (L-alpha,beta-diaminopropionic acid) residue. At the P1' position, these compounds contain one or two carboxylic acid groups, which are unfavorable for crossing the blood-brain barrier. Herein, we report BACE1 inhibitors with P1' carboxylic acid bioisosteres in order to develop practical anti-Alzheimer's disease drugs. Among them, tetrazole ring-containing compounds, KMI-570 (IC50=4.8 nM) and KMI-684 (IC50=1.2 nM), exhibited significantly potent BACE1 inhibitory activities.

PMID:
16481167
DOI:
10.1016/j.bmcl.2006.01.108
[PubMed - indexed for MEDLINE]

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