Discovery, Synthesis, and Biological Evaluation of a Novel Group of Selective Inhibitors of Filoviral Entry
作者:Maria V. Yermolina、Jizhen Wang、Michael Caffrey、Lijun L. Rong、Duncan J. Wardrop
DOI:10.1021/jm1008715
日期:2011.2.10
Herein, we report the development of an antifiloviral screening system, based on a pseudotyping strategy, and its application in the discovery of a novel group of small molecules that selectivelyinhibit the Ebola and Marburg glycoprotein (GP)-mediated infection of human cells. Using Ebola Zaire GP-pseudotyped HIV particles bearing a luciferase reporter gene and 293T cells, a library of 237 small molecules
在此,我们报告了基于假型策略的抗丝病毒筛选系统的开发,及其在发现一组新的小分子中的应用,这些小分子选择性地抑制了埃博拉病毒和马尔堡糖蛋白 (GP) 介导的人类细胞感染。使用带有荧光素酶报告基因和 293T 细胞的 Ebola Zaire GP 假型 HIV 颗粒,筛选了 237 个小分子库以抑制 GP 介导的病毒进入。从该测定中,先导化合物8a被鉴定为丝状病毒进入的选择性抑制剂,IC 5030 μM。为了分析功效的官能团要求,然后使用“点击”化学制备的 56 种异恶唑和三唑衍生物对这种 3,5-二取代异恶唑进行结构-活性关系分析。该研究表明,虽然异恶唑环可以被三唑系统取代,但在8a 中发现的 5-(二乙氨基)乙酰胺取代基是抑制病毒细胞进入所必需的。3-芳基取代基的变化提供了许多更有效的抗病毒剂,IC 50值范围为2.5 μM。还发现先导化合物8a及其三种衍生物可阻断马尔堡糖蛋白 (GP) 介导的人类细胞感染。
Studies on [2 + 3] cycloaddition reaction of nitrile oxides to linear dipolarophiles bearing multiple double bonds
作者:Mirosław Gucma、W. Marek Gołębiewski、Alicja Katarzyna Michalczyk
DOI:10.1007/s00706-016-1797-4
日期:2016.10
selectivity, regioselectivity, and stereoselectivity of [2 + 3] cycloaddition of benzonitrile oxides to polyunsaturated esters were examined. Site selectivity was correlated with electron charges of unsaturated carbon atoms. Structure of the products has been established by an extensive application of 1H and 13C NMR spectroscopy and electrospray ionization mass spectrometry. Graphical abstract
摘要研究了苄腈氧化物与多不饱和酯的[2 + 3]环加成反应的位点选择性,区域选择性和立体选择性。位点选择性与不饱和碳原子的电子电荷相关。产品的结构已通过1 H和13 C NMR光谱学和电喷雾电离质谱的广泛应用而建立。 图形概要
Cu(I)-Catalysis of One-Pot Synthesis of Some Novel Regioselective Isoxazole-Benzimidazole Hybrids and Their In Vitro Anti-Cancer Evaluation
作者:B. Ashok Kumar、V. Shanmukha Kumar Jagarlapudib
DOI:10.1134/s1070363219120296
日期:2019.12
Regioselective synthesis of some novel isoxazole-benzimidazole hybrids in high yields via Cu(I)-catalyzed tandem one-pot reaction of aromatic aldehydes with 1-prop-2-ynylbenzimidazole is developed. Structures of the synthesized compounds are confirmed by NMR and mass spectra. All the synthesized compounds have been tested for their in vitro anticancer activity against three human cancer cell lines
A Novel Synthesis of N-Unsubstituted β-Enamino Thioesters from 3-Arylisoxazoles and 3-Aryl-5-phenylthio-2-isoxazolines
作者:Leonardo Di Nunno、Paola Vitale、Antonio Scilimati
DOI:10.1055/s-0030-1258186
日期:2010.9
A novel procedure for the synthesis of N-unsubstituted β-enamino thioesters, (Z)-S-phenyl 3-amino-3-arylprop-2-enethioates, from 3-arylisoxazoles or 3-aryl-5-phenylthio-2-isoxazolines is described and a plausible mechanism for the reaction is proposed. Some examples of conversion of one β-enamino thioester [(Z)-S-phenyl 3-amino-3-phenylprop-2-enethioate] into N-unsubstituted β-enaminoacyl derivatives (β-enamino esters, β-enamino amides, and β-keto amides) are also reported.
Stereoselective dimerization of 3-arylisoxazoles to cage-shaped bis-β-lactams syn 2,6-diaryl-3,7-diazatricyclo[4.2.0.02,5]octan-4,8-diones induced by hindered lithium amides
作者:Leonardo Di Nunno、Paola Vitale、Antonio Scilimati、Laura Simone、Francesco Capitelli
DOI:10.1016/j.tet.2007.09.040
日期:2007.12
Stereochemistry of the so-obtained cage-shaped bis-β-lactams was assigned by X-ray diffraction analysis. Concerning the mechanism of formation of such hitherto unknown molecules, dimerization of an azetinone anion intermediate stereoselectively induced by Li+ chelation is suggested.