title: Substituted 3-((Z)-2-(4-nitrophenyl)-2-(1H-tetrazol-5-yl) vinyl)-4H-chromen-4-ones as novel anti-MRSA agents: synthesis, SAR, and in-vitro assessment.
abstract: In search for a new antibacterial agent with improved antimicrobial spectrum and potency, we designed and synthesized a series of novel 3-((Z)-2-(4-nitrophenyl)-2-(1H-tetrazol-5-yl) vinyl)-4H-chromen-4-ones 7a-h by convergent synthesis approach. All the synthesized compounds were assayed for their in-vitro antibacterial activities against gram-negative and gram-positive bacteria. The preliminary structure-activity relationship, to elucidate the essential structure requirements for the antimicrobial activity that results into anti-MRSA (methicillin-resistant S. aureus) potential, has been described. Amongst the synthesized compounds 7d, 7e, 7f and 7h were found to possess activity against methicillin-resistant S. aureus in addition to the activity against other bacterial strains such as E. faecalis, S. pneumoniae, and E. coli.
authors.affiliation: Drug Discovery Research, Chemistry, Wockhardt Research Centre, D-4, MIDC, Chikalthana, Aurangabad 431 210, India.
authors.forename: Santosh D
authors.initials: SD
authors.lastname: Diwakar
authors.forename: Sachin S
authors.initials: SS
authors.lastname: Bhagwat
authors.forename: Murlidhar S
authors.initials: MS
authors.lastname: Shingare
authors.forename: Charansing H
authors.initials: CH
authors.lastname: Gill
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002264:Carboxylic Acids / Q000737:chemistry; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D002867:Chromones / Q000138:chemical synthesis* / Q000494:pharmacology; D015195:Drug Design; D004926:Escherichia coli / Q000378:metabolism; D006801:Humans; D016106:Methicillin Resistance / Q000187:drug effects*; D008826:Microbial Sensitivity Tests; D008956:Models, Chemical; D015394:Molecular Structure; D013211:Staphylococcus aureus / Q000187:drug effects; D013329:Structure-Activity Relationship; D013777:Tetrazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D002264:Carboxylic Acids; D002867:Chromones; D013777:Tetrazoles