A series of compounds combining the beta-lactain and polyphenol scaffold have been prepared and evaluated for inhibition of human leukocyte elastase and matrix metallo-proteases MMP-2 and MMP-9. The design of these compounds has been based on the 'overlapping-type' strategy where two pharmacophores are linked in a single molecule. The most powerful compound against elastase was an N-galloyl-4-alkyliden beta-lactam, [3-[1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-1-(3,4,5-tris-benzyloxy-benzoyl)-azetidin-2-ylidene]-acetic acid ethylester, with an IC50 of 0.5 mu M; while the most powerful against MMP-2 was a 4-alkyliden beta-lactam arylated on the C-3 hydroxy side chain (3,5-bis-benzyloxy-4-hydroxy-benzoic acid 1-(2-benzyloxycarbonylmethylene4-oxo-azetidin-3-yl)-ethyl ester) with an IC50 of 4 mu M. Of the total 35 compounds tested, high levels of inhibition of elastase and of MMPs were separately exerted by distinct molecules. (c) 2005 Elsevier Ltd. All rights reserved.
Design, Synthesis, and Biological Evaluation of 4-Alkyliden-beta Lactams: New Products with Promising Antibiotic Activity Against Resistant Bacteria
作者:Francesco Broccolo、Gianfranco Cainelli、Gianluigi Caltabiano、Clementina E. A. Cocuzza、Cosimo G. Fortuna、Paola Galletti、Daria Giacomini、Giuseppe Musumarra、Rosario Musumeci、Arianna Quintavalla
DOI:10.1021/jm0580510
日期:2006.5.1
The design, synthesis, and antibacterial activity of 4-alkyliden-azetidin-2-ones as new antimicrobial agents against multidrug-resistant pathogens is reported. 4-Alkyliden-azetidin-2-ones were easily obtained using an original protocol starting from 4-acetoxy-azetidinones and diazoesters. Parent compounds were further elaborated to obtain a small library of 4-alkylidene derivatives. A molecular modeling