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Antibacterial Activities of New schiff Bases and Intermediate silyl Compounds synthesized from 5-substituted-1,10-phenanthroline- 2,9-dialdehyde

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Advances in Microbiology 2014年第15期4卷 1140-1153页

作者： Zinia Jaman Mohammad R. Karim Korsi Dumenyo Aminul H. Mirza Department of Chemistry Tennessee State University Nashville USA Department of Agriculture Tennessee State University Nashville USA Faculty of science Universiti Brunei Darussalam Bandar Seri Begawan Brunei

schiff bases are known to possess anticancer, antibacterial, antifungal, antitubercular, anti-inflammatory, antimicrobial and antimalarial properties. In this paper antibacterial studies against variety of plants and human pathogenic bacteria with eight newly synthesized schiff bases and several intermediate silyl compounds have been reported. The antibacterial activities of the synthesized compounds were primarily determined by paper disc diffusion method. The minimum inhibitory concentration (MIC) of each compound was also determined by tube dilution process. seven different human pathogenic bacteria and eighteen different plant pathogenic bacteria were used for the antibacterial activity studies. While all synthesized compounds have shown significant antibacterial activity, one intermediate silyl compound has shown remarkably high antibacterial property. 5-substituted derivatives have shown relatively higher activity than non-substituted compounds. Polar substituent which increases hydrophilicity may have a positive impact on the antibacterial property.

关键词： 5-Nitro-1 10-phenanthroline Dialdehyde 5-Bromo-1 schiff Bases s-alkyl/aryldithiocarbazates Thiosemicarbazide

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synthesis of 5-substituted 2, 9-Dimethyl-1,10-Phenanthroline Dialdehydes and Their schiff Bases with sulfur-Containing Amines

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International Journal of Organic Chemistry 2013年第3期3卷 214-219页

作者： Zinia Jaman Mohammad R. Karim Tasneem A. siddiquee Aminul H. Mirza Mohamad A. Ali Chemistry Faculty of Science University Brunei Darussalam Brunei Darussalam Sudan Department of Chemistry Tennessee State University Nashville USA

Eight new schiff bases of 5-nitro and 5-bromo-substituted 1,10-phenanthroline-2,9-dicarboxaldehydes with sulfur-containing amines, thiosemicarbazide, s-alkyl/aryl dithiocarbazates and 2-mercaptoaniline have been synthesized and characterized by a variety of spectroscopic methods. The condensation reactions of the dialdehydes with the amines were carried out both in the presence and absence of conc. sulfuric acid. A significant increase in yield of the schiff bases was observed when the reactions were carried out in the presence of sulfuric acid.

关键词： 5-Nitro-1 10-Phenanthroline Dialdehyde 5-Bromo-1 schiff Bases s-alkyl/aryldithiocarbazates Thiosemicarbazide

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