Synthesis and evaluation of novel peripherally restricted κ-opioid receptor agonists
作者:Virendra Kumar、Deqi Guo、Joel A. Cassel、Jeffrey D. Daubert、Robert N. DeHaven、Diane L. DeHaven-Hudkins、Erin K. Gauntner、Susan L. Gottshall、Susan L. Greiner、Michael Koblish、Patrick J. Little、Erik Mansson、Alan L. Maycock
DOI:10.1016/j.bmcl.2004.12.018
日期:2005.2
A series of 3-substituted analogs (3) of the parent K agonist, 1, were prepared to limit access to the central nervous system. With the exception of compound 3j, all other compounds bound to the human K opioid receptor with high affinity (K-i = 0.31-9.5 nM) and were selective for K over mu and 6 opioid receptors. Compounds 3c, d, and 3g-i produced potent antinociceptive activity in the rat formalin assay (i.paw) and the mouse acetic acid-induced writhing assay (s.c.), with weak activity in the mouse platform sedation test. The peripheral restriction indices of 3e, d, 3g, and X were improved 2- to 7-fold compared to the parent compound 1, and these compounds were approximately 2- to 5-fold more potent than the peripheral K agonist ICI 204448. (C) 2004 Elsevier Ltd. All rights reserved.