823788-11-0Relevant articles and documents
Synthesis of 1,3,4-trisubstituted pyrrolidines as meropenem adjuvants targeting New Delhi metallo-β-lactamase
Jin, Wen Bin,Xu, Chen,Qi, Xiao Lin,Zeng, Ping,Gao, Wei,Lai, Ki Hon,Chiou, Jiachi,Chan, Edward W. C.,Leung, Yun-Chung,Chan, Tak Hang,Wong, Kwok-Yin,Chen, Sheng,Chan, Kin-Fai
supporting information, p. 3515 - 3534 (2021/03/03)
The effective strategies to neutralize the New Delhi metallo-β-lactamase (NDM-1) activity offer unique opportunities to combination therapy because NDM-1 inactivates all classes of carbapenem antibiotics, which are widely regarded as the last resort of drugs for treating serious bacterial infections. Here we describe the efficient construction of a series of trans-1,3,4-trisubstituted pyrrolidines via boric acid-catalyzed 1,3-dipolar cycloaddition of N-benzylazomethine ylide with methyl ferulate for the biological evaluation of their cytotoxicity and synergistic activity in combination with meropenem towards NDM-1 positive carbapenem-resistant Enterobacteriaceae (CRE). The cell-based screens generated one promising hit, namely compound 10e, which exhibited low cytotoxicity (IC50 > 128 μM), moderate NDM-1 enzyme inhibition (IC50 = 51 μM), and potent synergistic activity against a panel of clinically isolated NDM-1 positive CRE with fractional inhibitory concentration indexes ranging from 0.01 to 0.25. Structure-activity relationship studies revealed that the zinc-chelating moiety of 2-(bis(pyridin-2-ylmethyl)-amino)acetyl group of compound 10e plays a pivotal role for potent activity. Regarding the inhibition mechanism, a series of biochemical assays revealed that compound 10e may inactivate NDM-1 activity by displacing both zinc ions from the active site of the enzyme. Altogether, our studies indicate that compound 10e represents an important pyrrolidine-type scaffold targeting NDM-1, providing a promising starting point to be further developed as carbapenem antibiotic adjuvants. This journal is
