Theoretical Calculations and Experimental Verification of the Antibacterial Potential of Some Monocyclic β-Lactams Containing Two Synergetic Buried Antibacterial Pharmacophore Sites
作者:Ali Parvez、Meshram Jyotsna、Moulay Hfid Youssoufi、Taibi Ben Hadda
DOI:10.1080/10426500903095556
日期:2010.6.30
A new series of N-thiazole, 3-phenyl, 4-substituted phenyl azetidine-2-ones 4(a–h) have been synthesized in good yields starting from 2-aminothiazole 1. In the first step, then Schiff's bases 3(a–h) are prepared by the condensation of 2-aminothiazole 1 with different aryl aldehydes 2(a–h). Finally, monocyclic β-lactams, i.e. substituted azetidinones 4(a–h), were the products formed using three different
Hydrolysis of imines: kinetics and mechanism of spontaneous acid-, base-, and metal ion-induced hydrolysis of N-salicylidene-2-aminothiazole
作者:Anadi C. Dash、Bhaskar Dash、Somnath Praharaj
DOI:10.1039/dt9810002063
日期:——
only copper(II) retards the rate of hydrolysis of the imine significantly. This is due to the formation of less reactive [CuL]+ species. Such a species, however, undergoes both spontaneous and acid-catalysed hydrolysis of the imine linkage in the pH range 4.22–5.2. The mixed-ligand complex [Zn(im)2L]+(im = imidazole) is also found to be an effective catalyst. The imine linkage in [Zn(im)2L]+ is hydrolysed
Synthesis and characterization of new technetium(I) and rhenium(I) Schiff base complexes. Crystal structure of [M(PPh3)2(CO)2 {(C3H2NS)NCHC6H4O}] (MTc, Re; C3H2NSThiazol-2-yl)
imine in boiling THF to yield [M(PPh3)2(CO)2 (C3H2NS)NCHC6H4O} ]. The structure of the two isomorphous complexes has been determined by X-ray crystallography based on single- crystal diffractometer data and refined to the final R factor of 0.039 for the Re complex and 0.059 for the Tc complex. The compounds are monoclinic, space group P21/n, with Z=4. Crystal data are: [Re- (PPh3)2(CO)2(L)] (L=Schiff
An efficient 2-aminothiazolesalicylaldehyde fluorescent chemosensor for Fe2+ ion detection and a potential inhibitor of NUDT5 signaling hormone for breast cancer cell and molecular keypad lock application
作者:Summaya Banu Basha、Immanuel David Charles、Nandhakumar Raju、Sakthivel Manokaran、Hemalatha Kuzhandaivel
DOI:10.1007/s11696-022-02373-z
日期:2022.11
The receptor1 complexing with various metal ions were studied through fluorescence spectroscopy showed its selectivity toward Fe2+ ion following a reverse photoinduced electron transfer (PET) process compared to all other potentially competing ions. The receptor1 was applied as a sensor to sense Fe2+ ion in water samples. The detection limit for Fe2+ ion in drinking water was substantially lower (0
首次通过席夫碱缩合反应一步法设计并合成了一种新型噻唑苯酚偶联物2-氨基噻唑水杨醛(受体1)。通过 FTIR、13 C NMR 和1 H NMR 证实了受体 1 的形成。IR光谱证实了醛亚胺形成的存在。质子 NMR 进一步支持了它,显示醛峰消失和新亚胺峰的形成。13 C NMR进一步证实了这一点。通过荧光光谱研究了受体1与各种金属离子的络合,显示其对Fe 2+的选择性与所有其他潜在竞争离子相比,反向光致电子转移 (PET) 过程后的离子。受体1用作传感器以检测水样中的Fe 2+离子。饮用水中 Fe 2+离子的检测限(0.003 µM) 远低于 EPA(环境保护机构)推荐的 (5.37 M)。受体1回收Fe 2+的能力井水、自来水和饮用水中的离子含量高达99.5%。受体 1 还用作分子对接中的螯合配体(受体 1),并被评估为 NUDT5 的潜在抑制剂,NUDT5 是一种用于乳腺癌的沉默激素信号
Half-Sandwich Ruthenium Complexes with Schiff-Base Ligands: Syntheses, Characterization, and Catalytic Activities for the Reduction of Nitroarenes
A series of ruthenium(II) p-cymene complexes containing Schiff-base ligands [Ru(p-cymene)LCl] [HL = pyridyl-salicylimine (2a-2d); HL = thiazol-salicylimine (2e-2h); HL = benzothiazol-salicylimine (2i-2I] have been synthesized and characterized. All Schiff-base ligands and half-sandwich ruthenium complexes were fully characterized by H-1 and C-13 NMR spectra, mass spectrometry, and infrared spectrometry. The molecular structures of ruthenium complexes 2b and 2k were further confirmed by single-crystal X-ray diffraction methods. Furthermore, these half-sandwich ruthenium complexes are active catalysts for the mild hydrogenation of nitroarenes to aromatic anilines in the presence of sodium tetrahydroborate reducing agent in water. The most efficient catalyst, 2b, was found be compatible with nitroarenes of various functional groups.