Synthesis, spectral characterization, crystal structure and antibacterial studies of diorganotin(IV) complexes with isonicotinoyl hydrazone derivatives
摘要:
The new diorganotin(IV) complexes R2SnL (L = L-a: R = Me 1, Ph 2; L = L-b: R = Me 3, Ph 4, L = L-c: R = Me 5, Ph 6, Bu 7) have been synthesized by the reaction of the hydrazone ligands N'-(5-bromo-2-hydroxybenzylidene) isonicotinohydrazide (H2La), N'((2-hydroxynaphthalen-1-yl)methylene) isonicotinohydrazide (H2Lb) and N'-(2,4-dihydroxybenzylidene) isonicotinohydrazide (H2L(c)) with diorganotin(IV) dichloride. The synthesised compounds have been investigated by elemental analysis, together with IR, H-1 and Sn-119 NMR spectroscopy. The structures of H2La, H2Lb and 3 have also been confirmed by X-ray crystallography. On the basis of these data, H2La and H2Lb are present in the keto-amine tautomeric form and intermolecular N-H center dot center dot center dot N hydrogen bonds form 1D chain structures. The hydrazone ligands act as tridentate dibasic in the enol form and are coordinated via the imine nitrogen, phenolate and enolate oxygen atoms. The in vitro antibacterial activity of the ligands and their complexes has been evaluated against Gram-positive (Bacillus subtilis and Staphylococcus aureus) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacteria and compared with standard antibacterial drugs. The R2SnLc complexes exhibited greater activities than the other compounds. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis and characterization of a series of isoniazid hydrazones. Spectroscopic and theoretical study
作者:Verónica Ferraresi-Curotto、Gustavo A. Echeverría、Oscar E. Piro、Reinaldo Pis-Diez、Ana C. González-Baró
DOI:10.1016/j.molstruc.2016.12.018
日期:2017.4
Abstract A family of hydrazones of isoniazid and a group of hydroxybenzalaldehydes (vanillin, 5-bromovanillin, 5-chlorosalicylaldehyde and 5-bromosalicylaldehyde) were obtained and fully characterized. The results, including theoretical data, are comparatively analyzed along with the already reported hydrazone of o -vanillin. The crystal structures of three compounds were determined. The hydrazones
Novel oxo–peroxo W(VI) Schiff base complex: synthesis, SC-XRD, spectral characterization, supporting on chloromethylated polystyrene, and catalytic oxidation of sulfides
oxo–peroxo tungsten(VI) Schiff base complex, [WO(O2)L(CH3OH)], as a homogeneous catalyst for sulfoxidation was synthesized by treating WO3 in H2O2 with an ONO–tridentate Schiff base ligand. The complex was characterized by FT-IR, UV–Vis, 1H NMR and 13C1H} NMR spectroscopy. Moreover, the structure of the crystalline tungsten(VI) complex was further investigated by SC-XRD. The crystal structure analysis revealed
通过在 H 2 O 2中用 ONO-三齿 Schiff处理 WO 3合成一种新型的氧代-过氧钨 (VI) 席夫碱配合物 [WO(O 2 )L(CH 3 OH)] 作为磺化氧化的均相催化剂碱基配体。该配合物通过 FT-IR、UV-Vis、1 H NMR 和13 C 1进行了表征H}核磁共振光谱。此外,通过SC-XRD进一步研究了结晶钨(VI)配合物的结构。晶体结构分析表明,W配合物的配位环境为七配位,被扭曲的五边形-双锥体中的配位体的ONO组占据。此外,固定在氯甲基化聚苯乙烯上的 W(VI) 席夫碱在非均相条件下显示出高效的硫化物氧化。通过 FT-IR、漫反射 UV-Vis、XRD、FE-SEM、EDX 和 ICP-AES 技术系统地表征了多相催化剂。相比之下,固定化非均相催化剂表现出优于其均相对应物的活性,并且可以重复使用多次。
Sah; Peoples, Journal of the American Pharmaceutical Association (1912), 1954, vol. 43, p. 513,514
作者:Sah、Peoples
DOI:——
日期:——
Design, synthesis and in vitro antimalarial activity of an acylhydrazone library
A library of acylhydrazone iron chelators was synthesized and tested for its ability to inhibit the growth of a chloroquine-resistant strain of Plasmodium falciparum. Some of these new compounds are significantly more active than desferrioxamine DFO, the iron chelator in widespread clinical use and also than the most effective chelators. (c) 2005 Elsevier Ltd. All rights reserved.
Tsukamoto; Yuhi, Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1958, vol. 78, p. 706