364599-60-0Relevant academic research and scientific papers
Synthesis and in vitro antiproliferative activity of novel 2-arylideneaminobenzimidazole derivatives
Nowicka, Anna,Liszkiewicz, Hanna,Nawrocka, Wanda P.,Wietrzyk, Joanna,Sadowska, Joanna
, p. 951 - 963 (2015/10/12)
A new class of Mannich bases 9-26, derivatives of 2-amino-1H-benzimidazole, were obtained in the condensation of Schiff bases 1-4 or 2-benzylaminobenzimidazoles 5-8 with selected secondary amines: morpholine, piperidine, N-methylpiperazine, N-phenylpiperazine, 1-(2-pyridyl)piperazine, 1(2-methoxyphenyl)piperazine, 1-(2-pyrimidinyl)piperazine and formaldehyde in ethanol. The pyrimido[1,2-a]benzimidazole derivatives 27-29 have been synthesized in the reactions of Schiff base 2 with selected compounds containing active methylene group: acetylacetone, benzoylacetone and malononitrile. The structures 1-29 were confirmed by the results of elementary analysis and their IR, 1H- and 13C-NMR spectra. The products 1-29 are of interest for biological studies and can be substrates for further synthesis. All compounds were screened against the cells of MV4-11 human leukemia and then the most active of them 5, 7, 9-16, 24-26, 28, 29 were tested towards human T47D breast and A549 lung cancer cells as well as normal mouse fibroblasts (BALB/3T3). The most active compound against the cancer cell lines was 4-amino-3-cyano-2-(4-hydroxyphenylene)-1,2-dihydropyrimido[1,2-a]benzimidazole (29) (IC50 0.23 ± 0.05 μg/mL against MV4-11 cells) showing in parallel very low cytotoxicity towards mouse fibroblasts. Cisplatin was the control drug.
Charge-assisted complexation of anions of different dimensionality by benzimidazole-based receptors bearing -OH functionality
Gogoi, Abhijit,Das, Gopal
experimental part, p. 4012 - 4021 (2012/10/18)
Two benzimidazole-based receptors (L1 and L2) bearing -OH functionality form crystalline salts with different organic and inorganic acids viz. [L1H+][Cl-] (1), [L 1H+][NO3-] (2), [L1H +][OAc-] (3), [L1H+][DNB -]DMF (4), [L1H+][H2PO 4-] (5), [L2H+][OAc-]AcOH (6), [L2H+][DNB-] (7), and [L 2H+][HSO4-]H2O (8) where the shape of the counteranion drives the solid structure from a one-dimensional polymeric chain to a three-dimensional structure. Structural analyses show that the anion binding in all eight complexes is attributable entirely to NH +anion, NHanion, OHanion, and multiple CHanion hydrogen bonding interactions. In the solid structure the planar nitrate anion forms a cyclic structure with receptor L1, whereas the acetate anion with the same receptor leads to a molecular barrel type structure. Again the tetrahedral dihydrogen phosphate anion forms a polymeric interanionic chain structure with L1, and the other tetrahedral hydrogen sulfate anion forms hydrogen sulfate-(water)2-hydrogen sulfate adducts with charged L2.
