A series of novel 2,3-dihydro-4H-1-benzoselenin-4-one (thio)semicarbazone derivatives were designed and synthesized by using molecular hybridization approach. All the target compounds were characterized by HRMS and NMR and evaluated in vitro antifungal activity angainst five pathogenic strains. In comparison with precursor selenochroman-4-ones, the hybrid molecules in this study showed significant
通过分子杂交的方法,设计合成了一系列新颖的2,3-二氢-4 H -1-苯并硒啉-4-酮(硫代)半碳zone酮衍生物。所有目标化合物均通过HRMS和NMR进行了表征,并针对五种病原菌株评估了其体外抗真菌活性。与前体硒代苯并二氢吡喃-4-酮相比,本研究中的杂化分子显示出显着的抗真菌活性。值得注意的是,化合物B8对除烟曲霉以外的其他菌株均表现出显着的抗真菌活性(白色念珠菌为0.25μg/ mL,新隐球菌为2μg/ mL,玉米芽孢杆菌为8μg / mL)。氟康唑敏感菌株白色念珠菌(Candida albicans)的浓度为2μg/ mL )。此外,化合物B8,B9和C2还显示出对四种氟康唑耐药菌株的最有效活性。特别地,杂合分子B8对耐氟康唑的菌株的MIC值在0.5-2μg/ mL的范围内。因此,本研究中的分子杂交方法为抗真菌药物的开发提供了新思路。
Synthesis and Antimalarial Activity of Novel Dihydro-Artemisinin Derivatives
The Plasmodium falciparum cysteine protease falcipain-2, one of the most promising targets for antimalarial drug design, plays a key role in parasite survival as a major peptide hydrolase within the hemoglobin degradation pathway. In this work, a series of novel dihydroartemisinin derivatives based on (thio)semicarbazone scaffold were designed and synthesized as potential falcipain-2 inhibitors. The
Oxothia compounds, especially 2-oxo-2,3-dihydro-benzo[b]thiophene compounds of the formula ##STR1## in which Ph represents an optionally substituted 1,2-phenylene radical, X represents oxygen or sulphur, R.sub.1 represents an organic radical bonded via a carbon atom and R.sub.2 denotes hydrogen or an optionally substituted hydrocarbon radical of aliphatic character, and their salts are useful as peripheral analgetics and/or as antiphlogistic uricosuric and/or thrombolytic agents.
The incidence of life-threatening fungal infections is increasing dramatically. In an attempt to develop novel antifungal agents, our previously synthesized phenoxyalkylpiperazine triazole derivatives were used as lead structures for further optimization. By means of structure-based bioisosterism, triazolone was used as a new bioisostere of oxygen atom. This type of bioisosteric replacement can improve the water solubility without loss of hydrogen-bonding interaction with the target enzyme. A series of triazolone-containing triazoles were rationally designed and synthesized. As compared with fluconazole, several compounds showed higher antifungal activity with broader spectrum, suggesting their potential for further evaluations. (C) 2011 Elsevier Masson SAS. All rights reserved.