174422-16-3Relevant articles and documents
Novel clarithromycin analogs with C-4′′ 2-arylbenzimidazolyl bishydrazide side chain: Synthesis and antibacterial evaluation
Qi, Yunkun,Ma, Ruixin,Li, Xin,Hu, Yue,Ma, Siti,Cong, Chao,Ma, Xiaodong,Cui, Wenping,Ma, Shutao
, p. 966 - 971 (2012/07/01)
A series of novel 4′′-O-2-arylbenzimidazolyl derivatives of clarithromycin were synthesized and evaluated. These 4′′-O-2- arylbenzimidazolyl derivatives demonstrated excellent activity against erythromycin-susceptible strains and showed remarkably improved activity against erythromycin-resistant strains compared with the references. In particular, compound 7c, which possesses the terminal 2-(2-methoxyphenyl)benzimidazolyl group on the C-4′′ bishydrazide side chain, not only presented the most potent activity against erythromycin-susceptible Streptococcus pneumoniae ATCC49619 and Staphylococcus aureus ATCC25923, exhibiting 4-fold and 4-fold higher efficacy than the parent clarithromycin, but also displayed the highest activity against erythromycin-resistant Streptococcus pneumoniae expressing the mef gene and the erm gene, which was 133-fold and 32-fold better than clarithromycin or azithromycin, respectively.
SYNTHESIS OF 1,2-DISUBSTITUTED BENZIMIDAZOLE-5(6)-CARBOXAMIDES AND EVALUATION OF THEIR ANTIMICROBIAL ACTIVITY
Goeker, Hakan,Tebrizli, Emin,Abbasoglu, Ufuk
, p. 53 - 58 (2007/10/03)
A series of 14,N'-(N,N-dialkylaminoethyl)-benzimidazole-5(6) or 5-carboxamides (1-14), having several substituents on the azole and benzene nuclei, were prepared and evalueted in vitro for antimicrobial activity.The precursor bezimidazolecarboxylic acids (15-27) were prepared via oxidative condensation of diaminobenzoic acids and several aldehydes with cupric ion.Compounds 11-14 were prepared by selective regioisomer synthesis.All carboxamides were prepared from the corresponding acids and N,N-dialkylethylenediamine.Antibacterial and antifungal activities were determined as MICs values.Of the synthesized compounds 1-10, 6 and 10 were found to be most favourable.In order to clarify the effect of the substituents at N1 on antimicrobial activity, 12 was prepared by p-chlorobenzyl substitution of compound 6, and increased activity was shown.Compounds 13 and 14, which were prepared by replacement with more bulky alkyl groups on the tert-N atom than 12, gave the best results.