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Background  There is a dire need for the discovery and development of new antimicrobial agents after several experiments for a better resistance of microorganisms towards antimicrobial agents become a serious health problem for a few years in the past. As benzimidazole possess various types of biological activities, it has been synthesized, in the present study, a new series of (5-(3-(1 H -benzo[d]imidazol-2-yl)-4-hydroxybenzyl)benzofuran-2-yl)(phenyl)methanone analogs by using the condensation and screened for its in vitro antimicrobial activity and cytotoxicity.    Results  The synthesized (5-(3-(1 H -benzo[d]imidazol-2-yl)-4-hydroxybenzyl) benzofuran-2-yl)(phenyl)methanone analogs were confirmed by IR,  1 H and  13 C-NMR, MS spectra and HRMS spectral data. The synthesized compounds were evaluated for their in vitro antimicrobial potential against Gram-positive ( Bacillus subtilis ,  Bacillus megaterium ,  Staph aureus  and  Streptococcus pyogenes ), Gram-negative ( Escherichia coli ,  Proteus vulgaris ,  Proteus mirabilis  and  Enterobacter aerogenes ) bacterial and fungal ( Aspergillus niger ,  Candida albicans ,  Fusarium oxysporum ,  Fusarium solani ) strains by disc diffusion method and the minimum inhibitory concentration (MIC) in which it has been recorded in microgram per milliliter in comparison to the reference drugs, ciprofloxacin (antibacterial) and nystatin (antifungal). Further, the cytotoxicity (IC 50  value) has also been assessed on human cervical (HeLa), Supt1 cancer cell lines by using MTT assay.    Conclusions  The following screened compounds ( 4d ), ( 4f ), ( 4g ), ( 4k ), ( 4l ), ( 4o ) and ( 4u ) were found to be the best active against all the tested bacterial and fungal strains among all the demonstrated compounds of biological study. The MIC determination was also carried out against bacteria and fungi, the compounds ( 4f ) and ( 4u ) are found to be exhibited excellent potent against bacteria and fungi respectively. The compounds ( 4f ) and ( 4u ) were shown non-toxic in nature after screened for cytotoxicity against the cancer cell lines of human cervical (HeLa) and Supt1. Additionally, structure and antibacterial activity relationship were also further supported by in silico molecular docking studies of the active compounds against DNA topoisomerase.Electronic supplementary material  The online version of this article (10.1186/s13065-017-0364-3) contains supplementary material, which is available to authorized users.

chemistry central journal

Synthesis, anti-microbial activity, cytotoxicity of some novel substituted (5-(3-(1H-benzo[d]imidazol-2-yl)-4-hydroxybenzyl)benzofuran-2-yl)(phenyl)methanone analogs