Antileishmanial activity screening of 5-nitro-2-heterocyclic benzylidene hydrazides
作者:Daniela G. Rando、Mitchell A. Avery、Babu L. Tekwani、Shabana I. Khan、Elizabeth I. Ferreira
DOI:10.1016/j.bmc.2008.05.076
日期:2008.7
A series of 53 nitro derivatives rationally designed were obtained by parallel synthesis and screened against Leishmania donovani. Six compounds exhibited IC50 values lower than standard drugs. Brief SAR analysis revealed that substitution is important to the activity. Nitrothiophene analogues were more potent than the nitrofuran ones. This was attributed to the ability of sulfur atoms in accommodating electrons from nitro group, which facilitate its reduction and therefore the formation of free radicals lethal to parasites. (c) 2008 Elsevier Ltd. All rights reserved.
Substituent effect on colorimetric detection of biologically and environmentally relevant anions: Insight in real-life applications
作者:Archana Singh、R. Girish Gowda、Darshak R. Trivedi
DOI:10.1016/j.saa.2019.04.087
日期:2019.8
aqueous medium due to the presence of two electron-withdrawing nitro substituents, which showed hydrogen bond donor tendency and acidity of the OH proton. This result indicates that R1 is highly capable of competing with an aqueous medium to detect anions without counter Na+ ion interference. Interestingly, R1 displays solvatochromic property in the presence of AcO− ions in different aprotic solvents
已经合成了具有不同取代基的一组新的生色阴离子受体R1-R4,分别包括吸电子(R1中的硝基部分),共轭基团(R2中的萘基)和供电子(R3中的甲基)。受体R1-R4表现出向在F非常良好的灵敏度-和ACO -在DMSO阴离子。此外,R1表明选择性朝ħ 2 PO 4 -相对于其它测试的阴离子的离子。R1尤其是充当一个有效的传感器与F的钠盐-,ACO -,ASO 2 - ,和ASO 4 2-由于两个吸电子硝基取代基的存在,水介质中的氢离子呈现出氢键供体的趋势和OH质子的酸度。该结果表明,R1具有与水介质竞争的能力,能够检测阴离子而又不会引起Na +离子的干扰。有趣的是,R1显示ACO的存在下溶剂化变色性质-在不同的非质子溶剂的离子。此外,该受体R1显示高结合亲和力朝向ACO -在缓冲介质离子(DMSO:HEPES,9:1 v / v)中,其显示显着的颜色变化从浅黄色到蓝色用大Δλ红移170 nm。该CV研究与ACO相互作用时透露-