Novel Cephalosporin Conjugates Display Potent and Selective Inhibition of Imipenemase-Type Metallo-β-Lactamases
作者:Kamaleddin H. M. E. Tehrani、Nicola Wade、Vida Mashayekhi、Nora C. Brüchle、Willem Jespers、Koen Voskuil、Diego Pesce、Matthijs J. van Haren、Gerard J. P. van Westen、Nathaniel I. Martin
DOI:10.1021/acs.jmedchem.1c00362
日期:2021.7.8
enzymatic hydrolysis of the β-lactam ring was observed, it was not accompanied by inhibitor release. Nonetheless, the cephalosporin prodrugs, especially thiomandelic acid conjugate (8), demonstrated potentinhibition of IMP-type MBLs. In addition, conjugate 8 was also found to greatly reduce the minimum inhibitory concentration of meropenem against IMP-producing bacteria. The results of kinetic experiments
A practical method to prepare 7-amino-3-(substituted thiomethyl)-3-cephem-4-carboxylic acids (1) was developed. The acetoxy group of 3-acetoxymethyl-7-amino-3-cephem-4-carboxylic acid (7-ACA, 2) was displaced by various thiols in the presence of strong acids (including Lewis acids) under nonaqueous conditions to afford 1 in high yields. Similar substitution of the Δ2-isomers of 2 was achieved by the same method.