We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Substituted-Amidine Functionalized Monocyclic β-Lactams: Synthesis and In Vitro Antibacterial Profile.
- Authors
He, Lili; Zhai, Lijuan; Sun, Jian; Ji, Jingwen; Ji, Jinbo; Liu, Yuanbai; Mu, Yangxiu; Gao, Yuanyu; Tang, Dong; Jiang, Rui; Myo, Ko Ko; Thu, Zaw Min; Yang, Haikang; Iqbal, Zafar; Yang, Zhixiang
- Abstract
Background. Owing to the intrinsic stability against common β-lactamases and metallo-lactamases, monobactams gathered special attention in antibiotic drug development. However, so far, aztreonam is the only monobactam approved by FDA for clinical use. We designed new derivatives of aztreonam to enhance its antibacterial efficacy. Methods. We synthesized a series of monocyclic β-lactams by modifying mainly at the C3 position of azetidinone ring. NH2 group at C3 of azetidinone was attached to thiazole and thiadiazole which in turn was linked to nitrogenous heterocyclic rings via amidine moieties. We then investigated the in vitro antibacterial activities of synthesized compounds against ten bacterial strains of clinical interest in comparison to aztreonam and ceftazidime. Results. All compounds showed improved antibacterial activities against tested strains compared to reference drugs. Compounds 14d and 14e were most potent and showed the highest potency against all bacterial strains, with MIC values ranging from 0.25 µg/mL to 8 µg/mL, as compared to aztreonam (MIC 16 µg/mL to >64 µg/mL) and ceftazidime (MIC >64 µg/mL). These compounds (14d and 14e) may be valuable lead targets against multidrug-resistant Gram-negative bacteria.
- Subjects
UNITED States. Food & Drug Administration; CEFTAZIDIME; AZTREONAM; LACTAMS; CHEMICAL synthesis; GRAM-negative bacteria; DRUG development; MOIETIES (Chemistry); THIADIAZOLES
- Publication
Journal of Chemistry, 2021, p1
- ISSN
2090-9063
- Publication type
Academic Journal
- DOI
10.1155/2021/9955206