Development and evaluation of ST-1829 based on 5-benzylidene-2-phenylthiazolones as promising agent for anti-leukotriene therapy
摘要:
Different inflammatory diseases and allergic reactions are mediated by leukotrienes, which arise from the oxygenation of arachidonic acid catalyzed by 5-lipoxygenase (5-LO). One promising approach for an effective anti-leukotriene therapy is the inhibition of this key enzyme. This study presents the synthesis and development of a potent and direct 5-LO inhibitor based on the well characterized 5-benzylidene-2-phenylthiazolone C06, whose further pharmacological investigation was precluded due to its low solubility. Through optimization of C06, evaluation of structure activity relationships including profound assessment of the thiazolone core and consideration of the solubility, the 5-benzyl-2-phenyl-4-hydroxythiazoles represented by 46 (ST-1829, 5-(4-chlorobenzyl)-2-p-tolylthiazol-4-ol) were developed. Compound 46 showed an improved 5-LO inhibitory activity in cell-based (IC50 values 0.14 mu M) and cell-free assays (IC50 values 0.03 mu M) as well as a prominent enhanced solubility. Furthermore, it kept its promising inhibitory potency in the presence of blood serum, excluding excessive binding to serum proteins. These facts combined with the non-cytotoxic profile mark a major step towards an effective anti-inflammatory therapy. (C) 2014 Elsevier Masson SAS. All rights reserved.
Development and evaluation of ST-1829 based on 5-benzylidene-2-phenylthiazolones as promising agent for anti-leukotriene therapy
摘要:
Different inflammatory diseases and allergic reactions are mediated by leukotrienes, which arise from the oxygenation of arachidonic acid catalyzed by 5-lipoxygenase (5-LO). One promising approach for an effective anti-leukotriene therapy is the inhibition of this key enzyme. This study presents the synthesis and development of a potent and direct 5-LO inhibitor based on the well characterized 5-benzylidene-2-phenylthiazolone C06, whose further pharmacological investigation was precluded due to its low solubility. Through optimization of C06, evaluation of structure activity relationships including profound assessment of the thiazolone core and consideration of the solubility, the 5-benzyl-2-phenyl-4-hydroxythiazoles represented by 46 (ST-1829, 5-(4-chlorobenzyl)-2-p-tolylthiazol-4-ol) were developed. Compound 46 showed an improved 5-LO inhibitory activity in cell-based (IC50 values 0.14 mu M) and cell-free assays (IC50 values 0.03 mu M) as well as a prominent enhanced solubility. Furthermore, it kept its promising inhibitory potency in the presence of blood serum, excluding excessive binding to serum proteins. These facts combined with the non-cytotoxic profile mark a major step towards an effective anti-inflammatory therapy. (C) 2014 Elsevier Masson SAS. All rights reserved.
Urea-Induced Acid Amplification: A New Approach for Metal-Free Insertion Chemistry
作者:Erica D. Couch、Tyler J. Auvil、Anita E. Mattson
DOI:10.1002/chem.201403283
日期:2014.7.1
α‐aryldiazoacetates in high yield. This methodology was found to be generally applicable to a broad substrate scope and presents a conceptually newapproach for organocatalytic diazo insertion reactions. Mechanistic investigations suggest that the reaction pathway involves a urea‐induced protonation of the α‐aryldiazoester.
PROCESS FOR PRODUCING THIOPHENE COMPOUND AND INTERMEDIATE THEREOF
申请人:Yanagihara Kazufumi
公开号:US20110124884A1
公开(公告)日:2011-05-26
To provide a novel process for producing a 2-aryl-3-hydroxy-4-substituted carbonyl thiophene compound or an intermediate thereof useful as an intermediate for production of medicines and agricultural chemicals.
A 2-aryl acetate compound represented by the formula (1):
wherein R
1
is an aryl group or the like, R
4
is a C
1-3
alkyl group or the like, and X is a leaving group, is reacted with a thioacetic acid compound to form a thioacetyl compound (3), the thioacetyl compound (3) is reacted with a vinyl ketone compound to form a γ-ketosulfide compound (5), which is cyclized under basic conditions to form a dihydrothiophene compound (6), and the dihydrothiophene compound (6) is oxidized by using an oxidizing agent to produce a 2-aryl-3-hydroxy-4-substituted carbonyl thiophene compound (7).