title: Synthesis and biological evaluation of new 2-azetidinones with sulfonamide structures.
abstract: New series of N-(arylidene)hydrazinoacetyl sulfonamides 4a1-6, 4b1-6 and N-(4-aryl-3-chloro-2-oxoazetidin-1-yl)aminoacetyl sulfonamides 5a1-6, 5b1-6 were synthesized. The structures of the new derivatives was confirmed using spectral methods (FT-IR, 1H-NMR, 13C-NMR). The antibacterial activities of these compounds against Gram positive (Staphylococcus aureus ATCC 6583, Staphylococcus epidermidis ATCC 12228, Enterococcus faecalis ATCC 25912) and Gram negative (Klebsiella pneumoniae CIP 53153, Proteus vulgaris CIP 104989, Citrobacter freundii CIP 5732, Enterobacter cloacae CIP 103475, Escherichia coli ATCC 25922, Pseudomonas aeruginosa CIP 82118) bacterial strains were evaluated using the broth micro-dilution method. Compound 4a2 displayed the highest antibacterial activity, especially against Staphylococcus epidermidis, Enterococcus faecalis and Pseudomonas aeruginosa. The antioxidant potential of the synthesized compounds was also investigated according to ferric reducing power, total antioxidant activity and DPPH radical scavenging assays. All tested compounds showed excellent antioxidant activity in comparison with sulfadiazine and sulfisoxazole which were used as parent sulfonamides. Moreover, some of them showed an antioxidant activity comparable with that of ascorbic acid. In general, the compounds designed based on a sulfadiazine skeleton (compounds 4a1-6, 5a1-6) are more active than those obtained from sulfisoxazole (compounds 4b1-6, 5b1-6), and the N-(arylidene)hydrazinoacetyl sulfonamide derivatives 4a1-6, 4b1-6 are more active than their azetidionone analogues 5a1-6, 5b1-6.
authors.affiliation: Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy, 16 University Street, Iasi 700115, Romania. farmacist_oanamaria@yahoo.com
authors.forename: Oana Maria
authors.initials: OM
authors.lastname: Dragostin
authors.forename: Florentina
authors.initials: F
authors.lastname: Lupascu
authors.forename: Cornelia
authors.initials: C
authors.lastname: Vasile
authors.forename: Mihai
authors.initials: M
authors.lastname: Mares
authors.forename: Valentin
authors.initials: V
authors.lastname: Nastasa
authors.forename: Ramona Florina
authors.initials: RF
authors.lastname: Moraru
authors.forename: Dragos
authors.initials: D
authors.lastname: Pieptu
authors.forename: Lenuta
authors.initials: L
authors.lastname: Profire
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D000975:Antioxidants / Q000138:chemical synthesis* / Q000494:pharmacology; D001384:Azetidines / Q000138:chemical synthesis* / Q000494:pharmacology; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D017550:Spectroscopy, Fourier Transform Infrared; D013329:Structure-Activity Relationship; D013449:Sulfonamides / Q000737:chemistry*
chemical_list: C116379:2-azetidinone; D000900:Anti-Bacterial Agents; D000975:Antioxidants; D001384:Azetidines; D013449:Sulfonamides