313278-99-8Relevant academic research and scientific papers
Inhibitory properties of 2-substituent-1H-benzimidazole-4-carboxamide derivatives against enteroviruses
Xue, Fei,Luo, Xianjin,Ye, Chenghao,Ye, Weidong,Wang, Yue
, p. 2641 - 2649 (2011)
A series of novel benzimidazole derivatives were designed, synthesized, and evaluated for their activities against four kinds of enteroviruses, that is, Coxsackie virus A16, B3, B6 and Enterovirus 71 in VERO cells. Strong activities against enterovirus replication and low cytotoxicities were observed in these benzimidazoles generally. The most promising compound was (l)-2-(pyridin-2-yl)- N-(2-(4-nitrophenyl)pentan-3-yl)-1H-benzimidazole-4-carboxamide (16), with a high antiviral potency (IC50 = 1.76 μg/mL) and a remarkable selectivity index (328). These compounds were selected for further evaluation as novel enterovirus inhibitors.
Resistance-modifying agents. 9. Synthesis and biological properties of benzimidazole inhibitors of the DNA repair enzyme poly(ADP-ribose) polymerase
White,Almassy,Calvert,Curtin,Griffin,Hostomsky,Maegley,Newell,Srinivasan,Golding
, p. 4084 - 4097 (2007/10/03)
The nuclear enzyme poly(ADP-ribose) polymerase (PARP) facilitates the repair of DNA strand breaks and is implicated in the resistance of cancer cells to certain DNA-damaging agents. Inhibitors of PARP have clinical potential as resistance-modifying agents capable of potentiating radiotherapy and the cytotoxicity of some forms of cancer chemotherapy. The preclinical development of 2-aryl-1H-benzimidazole-4-carboxamides as resistance-modifying agents in cancer chemotherapy is described. 1H-Benzimidazole-4-carboxamides, particularly 2-aryl derivatives, are identified as a class of potent PARP inhibitors. Derivatives of 2-phenyl-1H-benzimidazole-4-carboxamide (23, K(i) = 15 nM), in which the phenyl ring contains substituents, have been synthesized. Many of these derivatives exhibit K(i) values for PARP inhibition 10 nM, with 2-(4-hydroxymethylphenyl)-1H-benzimidazole-4-carboxamide (78, K(i) = 1.6 nM) being one of the most potent. Insight into structure-activity relationships (SAR) for 2-aryl-1H-benzimidazole-4-carboxamides has been enhanced by studying the complex formed between 2-(3-methoxyphenyl)-1H-benzimidazole-4-carboxamide (44, K(i) = 6 nM) and the catalytic domain of chicken PARP. Important hydrogen-bonding and hydrophobic interactions with the protein have been identified for this inhibitor. 2-(4-Hydroxyphenyl)-1H-benzimidazole-4-carboxamide (45, K(i) = 6 nM) potentiates the cytotoxicity of both temozolomide and topotecan against A2780 cells in vitro (by 2.8- and 2.9-fold, respectively).
