Synthesis of Novel Tetrahydro[4,5]imidazo[2,1-b]chromeno[4,3,2-de]quinazoline and Benzothiazol-2-ylaminoxanthenone Derivatives
作者:Majid M. Heravi、Mina Saeedi、Yahya S. Beheshtiha、Hossein A. Oskooie
DOI:10.3987/com-11-12201
日期:——
Some novel tetrahydroquinazoline and xanthenone derivatives were synthesized from the reaction of dimedone and Schiff base in the presence of sulfamic acid in good yields.
Synthesis, spectral, antitumor, antioxidant and antimicrobial studies on Cu(II), Ni(II) and Co(II) complexes of 4-[(1H-Benzoimidazol-2-ylimino)-methyl]-benzene-1,3-diol
作者:Nadia El-wakiel、Mai El-keiy、Mohamed Gaber
DOI:10.1016/j.saa.2015.03.020
日期:2015.8
A new Schiff base of 2-aminobenzimidazole with 2,4-dihydroybezaldehyde (H3L), and its Cu(II), Ni(II) and Co(II) complexes have been synthesized and characterized by elemental analyses, molar conductance, thermal analysis (TGA), inductive coupled plasma (ICP), magnetic moment measurements, IR, El-mass, UV Vis. and ESR spectral studies. On the basis of spectral studies and analytical data, it is evident that the Schiff base acts as dibasic tridentate ligand coordinating via deprotonated OH, NH and azomethine nitrogen atom. The results showed that Co(II) and Ni(II) complexes have tetrahedral structure while Cu(II) complexes has octahedral geometry. The kinetic and thermodynamic parameters of the thermal decomposition stages have been evaluated. The studied complexes were tested for their in vitro antimicrobial activities against some bacterial strains. The anticancer activity of the ligand and its metal complexes is evaluated against human liver Carcinoma (HEPG2) cell. These compounds exhibited a moderate and weak activity against the tested HEPG2 cell lines with IC50 of 9.08, 18.2 and 19.7 mu g/ml for ligand, Cu(II) and Ni(II) complexes, respectively. In vitro antioxidant activity of the newly synthesized compounds has also been evaluated. (C) 2015 Elsevier B.V. All rights reserved.