35608-17-4Relevant academic research and scientific papers
Stereochemically altered cephalosporins as potent inhibitors of New Delhi metallo-β-lactamases
Chen, Fangfang,Hu, Liqiang,Ji, Changge,Liu, Runqiu,Mao, Wuyu,Wang, Hao,Xie, Hexin,Xue, Shuyuan,Yang, Huixin,Yu, Tao,Zhang, Shuangzhan
, (2022/02/14)
Antibiotic resistance caused by β-lactamases, particularly metallo-β-lactamases, has been a major threat to public health globally. New Delhi metallo-β-lactamase-1 (NDM-1) represents one of the most important metallo-β-lactamases; the production of NDM-1 in bacterial pathogen significantly reduces the efficacy of β-lactam antibiotics, including life-saving carbapenems. Herein, we have demonstrated stereochemically altered cephalosporins as potent inhibitors against NDM-1, as well as mutants of NDM. The structure and activity relationship (SAR) study on over twenty cephalosporin analogues discloses the stereochemistry and the substituents on 7-position and 3′-position of cephalosporin are critical to suppress the activity of NDM-1 and the optimal compound 1u exhibited an IC50 of 0.13 μM. Furthermore, a crystal complex of NDM-1 and 1u has been obtained, suggesting this cephalosporin derivative inhibits enzyme activity by the formation of a relatively stable hydrolytic product-NDM-1 intermediate. The discovery in this study may pave the way to turn cephalosporin, a natural substrate of β-lactamase, into an effective NDM-1 inhibitor to combat antibiotic resistance.
7-(or 6-) Substituted-7-(or 6-)acylimino cephalosporin (or penicillin) compounds
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, (2008/06/13)
A process is provided which yields derivatives of cephalosporins and penicillins. The process starts with 7-aminodecephalosporanic acid or 6-APA and reacts with a carbonyl containing compound to form a Schiff's base (imino) adduct. This latter compound is
