cancer therapy. Combination chemotherapy using Tdp1 inhibitors as a component can potentially improve therapeutic response to many chemotherapeutic regimes. A new set of usnic acidderivatives with hydrazonothiazole pharmacophore moieties were synthesized and evaluated as Tdp1 inhibitors. Most of these compounds were found to be potent inhibitors with IC50 values in the low nanomolar range. The activity
Synthesis, NMR structural characterization and molecular modeling of substituted thiosemicarbazones and semicarbazones using DFT calculations to prove the syn/anti isomer formation
作者:T. K. Venkatachalam、Gregory K. Pierens、David C. Reutens
DOI:10.1002/mrc.4041
日期:2014.3
Thiosemicarbazones possessing electron‐donating and electron‐withdrawing groups were prepared, and their spectral characteristics determined. In all cases, the spectra showed that one isomer was formed, allowing further functionalization to molecules of biological interest. We provide NMR data for some of the thiosemicarbazones and semicarbazones. We also provide evidence that for 2‐pyridyl thiosemicarbazone
Platinum(II) and palladium(II) complexes [ML2] have been isolated from reaction of K2PtCl4 or K2PdCl4 and ligands (L) derivedfromthiosemicarbazones. The complexes were characterized by elemental analysis, Raman, IR, and NMR spectroscopy. In addition, quantum mechanical calculations were used to predict their structures and spectroscopic properties. For the first time, theoretical calculations using
已从 K2PtCl4 或 K2PdCl4 与衍生自缩氨基硫脲的配体 (L) 的反应中分离出铂 (II) 和钯 (II) 配合物 [ML2]。通过元素分析、拉曼光谱、红外光谱和核磁共振光谱对配合物进行了表征。此外,量子力学计算被用来预测它们的结构和光谱特性。首次使用 195Pt NMR 数据进行理论计算来支持建议的结构。结果表明亚硫基硫和偶氮甲碱氮以反式构型与金属离子键合。还研究了复合物对 B16-F10 和 CT26.WT 细胞系的抗菌活性和细胞毒性。与顺铂相比,一些复合物表现出优异的细胞毒活性。图形概要
A highly selective thiosemicarbazone based Schiff base chemosensor for colorimetric detection of Cu2+ and Ag+ ions and turn-on fluorometric detection of Ag+ ions
作者:Meman Sahu、Amit Kumar Manna、Kalyani Rout、Jahangir Mondal、Goutam K. Patra
DOI:10.1016/j.ica.2020.119633
日期:2020.8
Abstract A colorimetric and fluorometric turn-on probe L, (E)-1-((pyridin-4-yl)methylene) thiosemicarbazide has been synthesized and characterized by X-ray single crystal analysis, 1H- NMR, ESI-MS, UV–vis spectra and elemental analysis. The probe L, functioned as dual ions sensor to detect important metal ions Cu2+ and Ag+ in 1:1 methanol–water (v/v) solution in the presence of other cations (Fe3+
We reported a new method to construct porous thiourea-based metal–organicframeworks AGTU-3a with open Ag+ sites through the removal of anions in pores under mild conditions. By taking advantage of the deprotonation of thiourea-based ligands, the cationic frameworks can be transformed into neutral frameworks and anions in pores can be easily removed through treating with triethylamine under mild conditions