合成了七种新型二脒基 2,5-双(芳基)噻唑 ( 5a – g ),并针对布氏罗登斯锥虫( T. b. r .) 和恶性疟原虫( P. f. ) 进行了评估。通过双(三甲基甲硅烷基)氨基锂的作用,直接从相应的双腈(4a – g )获得二脒。双腈4a – f 的合成分四步进行,首先将 2-三丁基锡噻唑与适当的氰基芳基卤进行 Stille 偶联。通过钯促进混合锡-甲硅烷基试剂2-三甲基甲硅烷基-5-三甲基锡噻唑与2-溴-5-氰基吡啶的偶联获得双腈5g 。通过羟胺与双腈反应得到偕胺肟潜在前药6a – e , 6g 。偕胺肟的O-甲基化得到相应的N-甲氧基脒7a – c、7e、7g。正如 Δ T m测量所反映的那样,二脒显示出很强的 DNA 结合亲和力。四种二脒5a、5b、5d和5e在体外对P. f 具有高度活性。IC 50值在 1.1 至 2.5 nM 之间。相同的四种二脒显示针对 T. b. 的
Pd-PEPPSI-IPent: Low-Temperature Negishi Cross-Coupling for the Preparation of Highly Functionalized, Tetra-ortho-Substituted Biaryls
作者:Selçuk Çalimsiz、Mahmoud Sayah、Debasis Mallik、Michael G. Organ
DOI:10.1002/anie.200906811
日期:2010.3.8
Cool couplings: Complex, hindered biaryls have been prepared at temperatures ranging from 0°C to room temperature, or with gentle heating. The Pd‐PEPPSI‐IPent catalyst (see scheme) nicely couples starting materials containing acidic moieties and routinely prepares biaryl derivatives where one or both rings comprising the biaryl are heterocyclic. Ar1=hindered aryl or heteroaryl, Ar2=unactivated aryl
The sequential construction of diversified multifunctionalized thiazole derivatives through Pd-catalyzed regioselective C-H alkenylation has been accomplished. This versatile approach provides the diversified thiazole derivatives featuring orthogonal substitution patterns at the C-2, C-4 and C-5 positions from mono-substituted (2- or 4-substituted) thiazole derivatives or even more challenging simple
A new series of thiazole-containing triazole antifungals was synthesized and evaluated for antifungal activity against a variety of clinically isolated pathogenic fungi in vitro and against systemic candidosis in vivo. Among these compounds, (±)-1-(2, 4-difluorophenyl)-1-[4-(2, 4-difluorophenyl)thiazol-2-yl]-2-(1H-1, 2, 4-triazol-1-yl)ethanol (ER-24161) showed the most potent and well-balanced in vitro activities and excellent in vivo efficacy. We also achieved an enantioselective synthesis of the more potent enantiomer of ER-24161.
Cobalt-catalyzed activation of methylthio-substituted N-heterocycles facilitates either cross-coupling reactions with aryl- or benzylzinc compounds or synthesis of the corresponding zinc compounds.
[EN] THIAZOLE AND OXAZOLE KINASE INHIBITORS<br/>[FR] INHIBITEURS DE KINASES THIAZOLES ET OXAZOLES
申请人:AB SCIENCE
公开号:WO2011086085A1
公开(公告)日:2011-07-21
The present invention is concerned with substituted azole derivatives that selectively modulate, regulate, and/or inhibit signal transduction mediated by certain native and/or mutant proteine kinases implicated in a variety of human and animal diseases such as cell proliferative, metabolic, allergic, and degenerative disorders. In particular, several of these compounds are potent and selective Flt-3 inhibitors or/and syk inhibitors.