Direct Access to Benzo[<i>b</i>]furans through Palladium-Catalyzed Oxidative Annulation of Phenols and Unactivated Internal Alkynes
作者:Malleswara Rao Kuram、M. Bhanuchandra、Akhila K. Sahoo
DOI:10.1002/anie.201210217
日期:2013.4.22
2,3‐Disubstituted benzo[b]furans are prepared in one step from commercially available phenols and readily accessible unactivatedinternalalkynes (see scheme). This Pd‐catalyzed oxidativeannulation has a broad substrate scope and allows access to a wide range of benzo[b]furans.
2,3-二取代的苯并[ b ]呋喃一步一步由市售的苯酚和易于获得的未活化内部炔烃制得(参见方案)。这种Pd催化的氧化环化具有广泛的底物范围,并允许使用各种苯并[ b ]呋喃。
Design and synthesis of a BOAHY-derived tracker for fluorescent labeling of mitochondria
Herein, based on our experience in construction of fluorescent difluoroboronate anchored acylhydrazones (BOAHY) chromophores, we rationally designed a novel monoboron complex with a connected triphenylphosphonium moiety, and evaluated its spectroscopic properties, cytotoxicity and intracellular localization. Owing to the positive charge on our fluorescent dye, the molecule had an excellent mitochondria-targeting
evaluation of new furan derivatives targeting Mycobacteriumtuberculosissalicylatesynthase (MbtI). A receptor-based virtual screening procedure was applied to screen the Enamine database, identifying two compounds, I and III, endowed with a good enzyme inhibitory activity. Considering the most active compound I as starting point for the development of novel MbtI inhibitors, we obtained new derivatives
我们报告针对结核分枝杆菌水杨酸合酶(MbtI)的新呋喃衍生物的虚拟筛选,合成和生物学评估。应用基于受体的虚拟筛选程序筛选Enamine数据库,鉴定出具有良好酶抑制活性的两种化合物I和III。考虑到最具活性的化合物I作为开发新型MbtI抑制剂的起点,我们获得了基于呋喃支架的新衍生物。在此类SAR中,化合物1a成为迄今为止报道的最有效的MbtI抑制剂(K i = 5.3μM )。此外,化合物1a表现出有希望的抗 分枝杆菌活性(MIC 99 = 156μM),这可能与分枝杆菌素的生物合成抑制有关。