Discovery of CS-2100, a potent, orally active and S1P3-sparing S1P1 agonist
摘要:
S1P(3)-sparing S1P(1) agonists have attracted attention as a suppressant of autoimmunity with reduced side effects. Our synthetic efforts and extensive SAR studies led to the discovery of 10b named CS-2100 with the EC50 value of 4.0 nM for human S1P(1) and over 5000-fold selectivity against S1P(3). The in vivo immunosuppressive efficacy was evaluated in rats on host versus graft reaction and the ID50 value was determined at 0.407 mg/kg. The docking studies of CS-2100 with the homology model of S1P(1) and S1P(3) showed that the ethyl group on the thiophene ring of CS-2100 was sterically hindered by Phe263 in S1P(3), not in the case of Leu276 in S1P(1). This observation gives an explanation for the excellent S1P(3)-sparing characteristic of CS-2100. (C) 2011 Elsevier Ltd. All rights reserved.
Novel cyclic peptide derivatives based on ogipeptins A, B, C, and D were synthesized. Starting with a mixture of ogipeptins A–D, a practical four-step synthetic procedure was followed to prepare novel derivatives with various kinds of acyl side chains. Among the 45 new synthetic derivatives identified, the antibacterial activities of compounds 8-3 and 8-38 were comparable with those of ogipeptin A
1-SUBSTITUTED 4-ARYLPIPERAZINE AS KAPPA OPIOID RECEPTOR ANTAGONISTS
申请人:RESEARCH TRIANGLE INSTITUTE
公开号:US20150005315A1
公开(公告)日:2015-01-01
Provided are compounds represented by the formula: where R, Y
3
, R
1
, R
2
, R
3
, R
4
, R
6
, G, R
7
, E
1
, E
2
, A, B, W, X, Y and Z are as defined herein.
Addressing cytotoxicity of 1,4-biphenyl amide derivatives: Discovery of new potent and selective 17β-hydroxysteroid dehydrogenase type 2 inhibitors
作者:Emanuele Marco Gargano、Enrico Perspicace、Angelo Carotti、Sandrine Marchais-Oberwinkler、Rolf W. Hartmann
DOI:10.1016/j.bmcl.2015.11.047
日期:2016.1
Four different classes of new 17 beta-hydroxysteroid dehydrogenase type 2 (17 beta-HSD2) inhibitors were synthesized, in order to lower the cytotoxicity exhibited by the lead compound A, via disrupting the linearity and the aromaticity of the biphenyl moiety. Compounds 3, 4, 7a and 8 displayed comparable or better inhibitory activity and selectivity, as well as a lower cytotoxic effect, compared to the reference compound A. The best compound 4 (IC50 = 160 nM, selectivity factor = 168, LD50 approximate to 25 mu M) turned out as new lead compound for inhibition of 17 beta-HSD2. (C) 2015 Elsevier Ltd. All rights reserved.
Discovery of <i>N</i>-{4-[(3-Hydroxyphenyl)-3-methylpiperazin-1-yl]methyl-2-methylpropyl}-4-phenoxybenzamide Analogues as Selective Kappa Opioid Receptor Antagonists
作者:Chad M. Kormos、Chunyang Jin、Juan Pablo Cueva、Scott P. Runyon、James B. Thomas、Lawrence E. Brieaddy、S. Wayne Mascarella、Hernán A. Navarro、Brian P. Gilmour、F. Ivy Carroll
DOI:10.1021/jm400275h
日期:2013.6.13
There is continuing interest in the discovery and development of new kappa opioid receptor antagonists. We recently reported that N-substituted 3-methyl-4-(3-hydroxyphenyl)piperazines were a new class of opioid receptor antagonists. In this study, we report the syntheses of two piperazine JDTic-like analogues. Evaluation of the two compounds in an in vitro [S-35]GTP gamma S binding assay showed that neither compound showed the high potency and kappa opioid receptor selectivity of JDTic. A library of compounds using the core scaffold 21 was synthesized and tested for their ability to inhibit [S-35]GTP gamma S binding stimulated by the selective kappa opioid agonist U69,593. These studies led to N-[(1S)-1-[(3S)-4-(3-hydroxyphenyl)-3-methylpiperazin-1-yl]methyll-2-methylpropyl]-4-phenoxybenzamide (11a), a compound that showed good kappa opioid receptor antagonist properties. An SAR study based on 11a provided 28 novel analogues. Evaluation of these 28 compounds in the [S-35]GTP gamma S binding assay showed that several of the analogues were potent and selective kappa opioid receptor antagonists.
Discovery and Optimization of Tetramethylpiperidinyl Benzamides as Inhibitors of EZH2
作者:Christopher G. Nasveschuk、Alexandre Gagnon、Shivani Garapaty-Rao、Srividya Balasubramanian、Robert Campbell、Christina Lee、Feng Zhao、Louise Bergeron、Richard Cummings、Patrick Trojer、James E. Audia、Brian K. Albrecht、Jean-Christophe P. Harmange
DOI:10.1021/ml400494b
日期:2014.4.10
The identification and development of a novel series of small molecule Enhancer of Zeste Homologue 2 (EZH2) inhibitors is described. A concise and modular synthesis enabled the rapid development of structure activity relationships, which led to the identification of 44 as a potent, SAM-competitive inhibitor of EZH2 that dose-dependently decreased global H3K27me3 in KARPAS-422 lymphoma cells.