Arzneimittelforschung 2004; 54(1): 64-68
DOI: 10.1055/s-0031-1296938
Antibiotics · Antiviral Drugs · Chemotherapeutics · Cytostatics
Editio Cantor Verlag Aulendorf (Germany)

Synthesis and Antibacterial Activities of New Bis-benzimidazoles

Hasan Küçükbay
a   Department of Chemistry, Faculty of Arts and Sciences, İnönü University, Malatya, Turkey
,
Riza Durmaz
b   Department of Microbiology, Faculty of Medicine, İnönü University, Malatya, Turkey
,
Naif Okuyucu
a   Department of Chemistry, Faculty of Arts and Sciences, İnönü University, Malatya, Turkey
,
Selami Günal
b   Department of Microbiology, Faculty of Medicine, İnönü University, Malatya, Turkey
,
Cavit Kazaz
c   Department of Chemistry, Faculty of Arts and Sciences, Atatürk University, Erzurum, Turkey
› Author Affiliations
Further Information

Publication History

Publication Date:
25 December 2011 (online)

Summary

Twenty bis-benzimidazole derivatives were synthesised by the reaction of benzi-midazole with appropriate alkyl halides. The compounds synthesised were identified by 1H, 13C-NMR, FT-IR and micro analysis. All compounds studied in this work were screened for their in vitro antibacterial activity against standard strains; Enterococcus faecalis (ATCC 29212), Staphylococcus aureus (ATCC 29213), Escherichia coli (ATCC 25922) and Pseudomonas aeruginosa (ATCC 27853). Ten of the compounds were found effective to inhibit the growth of gram-positive bacteria (E. faecalis and S. aureus) at MIC (minimal inhibitory concentration) values between 50–400 g/ml. Two of the compounds showed MIC values of 200 μg/ml against gram-negative bacteria (E. coli and P. aeruginosa).

Zusammenfassung

Synthese und antibakterielle Wirkung von neuen Bisbenzimidazolen

Zwanzig Bisbenzimidazol-Derivate wurden durch Reaktion von Benzimidazol mit entsprechenden Alkylhaliden hergestellt. Die Verbindungen wurden mittels 1H, 13C-NMR, FT-IR und anderer spektroskopischer Methoden sowie durch Mikroanalyse identifiziert. Bei zehn der untersuchten Verbindungen wurde eine Hemmung des Wachstums gram-positiver Bakterien (E. faecalis und S. aureus) bei minimalen Hemmkonzentrationen (MHK) zwischen 50 und 400 μg/ml beobachtet, gegen gram-negative Bakterien (E. coli and P. aeruginosa) betrugen die MHK etwa 200 μg/ml.