Novel CdCl2 and HgCl2 complexes with 3-monosubstituted and 3,3-disubstituted 1-furoylthioureas: IR and Raman spectra
作者:O. Estévez-Hernández、E. Otazo-Sánchez、J.L. Hidalgo-Hidalgo de Cisneros、I. Naranjo-Rodríguez、E. Reguera
DOI:10.1016/j.saa.2005.09.005
日期:2006.7
of the thiocarbonyl group. This fact is supported by the observed frequencyshift, to lower values, in the nu(CS) vibration on the coordination and the appearance of a low frequency Raman line which was assigned to the metal-sulfur stretching, nu(M-S), in the formed complex. The frequency of the nu(CO) vibration always increases on complex formation, which discards the participation of the carbonyl group
In this work, an efficient and versatile synthesis of novel thiazol‐2‐ylidene‐amides from various carbonylthiourea derivatives is described. A sequential alkylation–cyclization reaction between thioureas and propargyl bromide in the presence of DABCO in refluxing ethanol afforded 4‐methylthiazol‐2(3H)‐ylidene‐amide derivatives in good yields.
<i>N</i>,<i>N</i>′,<i>N</i>′′-Trisubstituted guanidine derivatives as DNA-intercalators: synthesis, crystal structures and biophysical investigations
作者:R. Durga Priyadharshini、P. N. Sathishkumar、M. Bensingh、N. Bhuvanesh、K. N. Vennila、R. Karvembu、Kuppanagounder P. Elango
DOI:10.1039/d3nj01327h
日期:——
Three new N,N′,N′′-trisubstituted guanidine derivatives (L1, L2 and L3) were synthesized and characterized using NMR and mass spectral studies. The structures of these ligands have been confirmed using single-crystal XRD studies. The interactions between these ligands and calf-thymus DNA (CT-DNA) were investigated in vitro using different spectroscopic methods and molecular docking and simulation methods
合成了三种新的N、N '、N ''-三取代胍衍生物(L1、L2和L3),并使用 NMR 和质谱研究进行了表征。这些配体的结构已通过单晶 XRD 研究得到证实。使用不同的光谱方法以及生理缓冲液(pH 7.4)中的分子对接和模拟方法,在体外研究了这些配体与小牛胸腺DNA(CT-DNA)之间的相互作用。紫外-可见光谱滴定表明形成了L2 /CT-DNA 复合物。添加越来越多的 CT-DNA 增强了L2的荧光结合常数约为 10 4 M -1,表明它们之间的结合相当强。热力学参数ΔG 0 < 0 且 | ΔH 0 | < T | ΔS 0 | 表明络合是自发的和熵驱动的,其中疏水相互作用在稳定络合物中起主导作用。分子对接和元动力学模拟研究表明 DNA 碱基对之间的一个苯环部分插入,圆二色性、粘度测量和 KI 猝灭研究有力地支持了这一点。
Pharmaceutical Compositions For and Methods of Inhibiting Hcv
申请人:Huang Mingjun
公开号:US20080207760A1
公开(公告)日:2008-08-28
The present invention relates generally to replicase complex defect inducers and pharmaceutical compositions containing such inducers. Methods of developing mutants that are resistant to replicase complex defect inducers are also provided. Further included are mutants that can be used in screening for replicase complex defect inducers. Methods of screening test compounds for the ability to induce the formation of replicase complex defects are also described. Also included are methods of inhibition of HCV replication by replicase complex defect inducers.
Aroylthioureas: new organic ionophores for heavy-metal ion selective electrodes
Thiourea derivatives (46 aroylthioureas) having different substituents close to the sulfur atom were synthesized and their ionophore potential in ion selective electrodes (ISEs) was examined. Structural considerations were taken into account based on the corresponding heavy-metal ISE parameters. As ionophores, some 1-furoyl-3-substituted thioureas (series 2) gave the best results in Pb(II), Hg(II) and Cd(II) ISEs. The strong intramolecular hydrogen bond in series 2 allows ligand interaction only through the CS group. Substituents on the furan and phenyl rings give rise to low solubility in the membrane plasticizer. 3-Alkyl substituted furoylthioureas improve solubility but enhance oxidative processes with chain length. New X-ray diffraction (XRD) structures and theoretical DFT calculations were considered in the analysis of the substituent influence on the selectivity of ISEs. These new ionophores have advantages because of their stability, simple synthesis and easy modification of the sulfur binding ability resulting from substitution.