Synthesis, structural characterization and biological studies of copper complexes with 2-aminobenzothiazole derivatives
摘要:
Novel copper complexes of 2-aminobenzothiazole derivatives were synthesized by the condensation of Knoevenagel condensate acetoacetanilide (obtained from substituted benzaldehydes and acetoacetanilide) and 2-aminobenzothiazole. They were thoroughly characterized by elemental analysis, IR, H-1 NMR, UV-Vis., MS Spectra, molar conductance, magnetic moment and electrochemical studies. These spectral studies suggested that distorted square planar geometry for all the complexes. Molar conductance data and magnetic susceptibility measurements provide evidence for monomeric and neutral nature of the complexes. The electrochemical behaviour of the ligand and complexes in DMSO at 298 K was studied. The present ligand systems stabilize the unusual oxidation states of copper ion during electrolysis. Antibacterial screening of the ligands and their complexes reveal that all the complexes show higher activities than the free ligands. (C) 2014 Elsevier B.V. All rights reserved.
Synthesis, structural characterization and biological studies of copper complexes with 2-aminobenzothiazole derivatives
摘要:
Novel copper complexes of 2-aminobenzothiazole derivatives were synthesized by the condensation of Knoevenagel condensate acetoacetanilide (obtained from substituted benzaldehydes and acetoacetanilide) and 2-aminobenzothiazole. They were thoroughly characterized by elemental analysis, IR, H-1 NMR, UV-Vis., MS Spectra, molar conductance, magnetic moment and electrochemical studies. These spectral studies suggested that distorted square planar geometry for all the complexes. Molar conductance data and magnetic susceptibility measurements provide evidence for monomeric and neutral nature of the complexes. The electrochemical behaviour of the ligand and complexes in DMSO at 298 K was studied. The present ligand systems stabilize the unusual oxidation states of copper ion during electrolysis. Antibacterial screening of the ligands and their complexes reveal that all the complexes show higher activities than the free ligands. (C) 2014 Elsevier B.V. All rights reserved.
Synthesis of benzo[c][2,7]naphthyridine-6-ones via cascade aromatization/C(sp2)–H amidation of 1,4-dihydropyridines
作者:Laichun Luo、Qiang Wang、Xiaozhi Peng、Chunling Hu、Hong Wang
DOI:10.1016/j.tetlet.2017.06.009
日期:2017.7
A K2S2O8-mediated cascade dehydrogenative aromatization/intramolecularC(sp2)–Hamidation of 1,4-dihydropyridines is described. This method provides an efficient access to multisubstituted benzo[c][2,7]naphthyridine-6-ones in 38–74% yields.
描述了AK 2 S 2 O 8介导的1,4-二氢吡啶的级联脱氢芳构化/分子内C(sp 2)-H酰胺化。该方法可有效获得多取代的苯并[ c ] [2,7]萘啶-6-酮,产率为38-74%。