Synthesis of anti -inflammatory α-and β-linked acetamidopyranosides as inhibitors of toll-like receptor 4 (TLR4)
作者:Peter Wipf、Benjamin R. Eyer、Yukihiro Yamaguchi、Feng Zhang、Matthew D. Neal、Chhinder P. Sodhi、Misty Good、Maria Branca、Thomas Prindle、Peng Lu、Jeffrey L. Brodsky、David J. Hackam
DOI:10.1016/j.tetlet.2014.11.048
日期:2015.6
The low-molecular weight isopropyl 2-acetamido-alpha-glucoside 16 (C34) inhibits toll-like receptor 4 (TLR4) in enterocytes and macrophages in vitro, and reduces systemic inflammation in mouse models of endotoxemia and necrotizing enterocolitis. We used a copper(II)-mediated solvolysis of anomeric oxazolines and an acid-mediated conversion of beta-glucosamine and beta-galactosamine pentaacetates to generate analogs of 16 at the anomeric carbon and at C-4 of the pyranose ring. These compounds were evaluated for their influence on TLR4-mediated inflammatory signaling in cultured enterocytes and monocytes. Their efficacy was confirmed using a NF-kB-luciferase reporter mouse, thus establishing the first structure-activity relationship (SAR) study in this series and identifying the more efficacious isopropyl 2-acetamido-alpha-galactoside 17. (C) 2014 Elsevier Ltd. All rights reserved.