title: Design and synthesis of 2-methylthio-3-substituted-5,6-dimethylthieno [2,3-d] pyrimidin-4(3H)-ones as analgesic, anti-inflammatory and antibacterial agents.
abstract: Pain and inflammation are simultaneous responses in bacterial infections. In current clinical practice, two groups of agents like antibacterial and non-steroidal anti-inflammatory drugs (NSAID's) are prescribed simultaneously. Regrettably, none of the drug possesses these activities in a single component. Exploiting the bioisosterism concept, we have documented that 2-phenyl-3-substituted quinazolines, 2,3-disubstituted quinazolines, 2-methyl-3-substituted quinazolin-4-(3H)-ones and 2-methylthio-3-substituted quinazolin-4-(3H)-ones exhibited good analgesic and anti-inflammatory activities. The present work is an extension of our ongoing efforts towards the development and identification of lead molecules by bioisostere concept, for which we designed some of 2-methylthio-3-substituted-5,6-dimethylthieno[2,3-d] pyrimidin-4(3H)-ones. The title compounds were investigated for analgesic, anti-inflammatory and antibacterial activities. While the test compounds exhibited significant activity, the compounds (6-9) showed more potent analgesic activity, and the compounds (8, 9) showed anti-inflammatory activity comparable to the reference standard diclofenac.
authors.affiliation: Medicinal Chemistry Research Laboratory, Arulmigu Kalasalingam College of Pharmacy, Krishnan kovil-626 190, India. drvalagarsamy@gmail.com
authors.forename: V
authors.initials: V
authors.lastname: Alagarsamy
authors.forename: V Raja
authors.initials: VR
authors.lastname: Solomon
authors.forename: R
authors.initials: R
authors.lastname: Meena
authors.forename: K V
authors.initials: KV
authors.lastname: Ramaseshu
authors.forename: K
authors.initials: K
authors.lastname: Thirumurugan
authors.forename: S
authors.initials: S
authors.lastname: Murugesan
mesh_terms: D018712:Analgesics, Non-Narcotic / Q000138:chemical synthesis* / Q000494:pharmacology*; D000818:Animals; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology*; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000138:chemical synthesis* / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D002351:Carrageenan; D015195:Drug Design; D004487:Edema / Q000139:chemically induced / Q000517:prevention & control; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D010147:Pain Measurement / Q000187:drug effects; D011744:Pyrimidinones / Q000138:chemical synthesis* / Q000494:pharmacology*; D051381:Rats; D011930:Reaction Time / Q000187:drug effects; D013329:Structure-Activity Relationship; D013876:Thiophenes / Q000138:chemical synthesis* / Q000494:pharmacology*; D013890:Thiourea / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology
chemical_list: D018712:Analgesics, Non-Narcotic; D000900:Anti-Bacterial Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal; D007202:Indicators and Reagents; D011744:Pyrimidinones; D013876:Thiophenes; D002351:Carrageenan; D013890:Thiourea