title: Synthesis of some 3-substituted amino-4,5-tetramethylene thieno[2,3-d][ 1,2,3]-triazin-4(3H)-ones as potential antimicrobial agents.
abstract: A series of 3-substituted amino-4,5-tetramethylene thieno[2,3-d] [1,2,3]-triazine-4(3H)-ones have been synthesized and characterized by UV,IR, 1H NMR, elemental and mass spectral analysis. The title compounds were evaluated for their antimicrobial activity by agar diffusion method against four bacteria and three fungi using Ampicillin and Miconazole nitrate as standards. The compounds VIIIa, IXa, Xa and XIa showed an antimicrobial efficacy considerably greater than the compounds Ia to VIIa with -H, phenyl and electron donating (activating) groups like methyl, ethyl and tolyl substitutions at R, suggesting that lipophillic groups like chloro, fluoro substitution on the phenyl ring plays an important role in enhancing the antimicrobial properties of this class of compounds. From the screening results it can be concluded that the compounds having the lipophillic groups like chlorophenyl and fluorophenyl groups at R exhibited appreciable antimicrobial activities. Whereas, the compounds are having -H, phenyl and electron donating (activating) groups like methyl, ethyl and tolyl substituents at R were less active against all the organisms used.
authors.affiliation: Department of Pharmaceutical Chemistry, P.E.S College of Pharmacy, 50 Ft Road. Hanumanthanagar, Bangalore-560 050, Karnataka, India. drjayes@gmail.com
authors.forename: Janardhanan
authors.initials: J
authors.lastname: Saravanan
authors.forename: Shamanna
authors.initials: S
authors.lastname: Mohan
authors.forename: Jay Jyoti
authors.initials: JJ
authors.lastname: Roy
mesh_terms: D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D005658:Fungi / Q000187:drug effects; D013057:Spectrum Analysis; D013876:Thiophenes / Q000737:chemistry; D014227:Triazines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000890:Anti-Infective Agents; D013876:Thiophenes; D014227:Triazines