Quaternary heterocyclylamino .beta.-lactams: a generic alternative to the classical acylamino side chain
作者:John Hannah、Charles R. Johnson、Arthur F. Wagner、Edward Walton
DOI:10.1021/jm00346a024
日期:1982.4
beta-[(1-substituted-4-pyridinio)amino]ceph-3-em-4-carboxylates have been found to be interesting new classes of antibacterial beta-lactams, readily available by SN2 Ar coupling of fluoro-substituted quaternized pyridines and appropriate amino lactam carboxylic acids. Compared to penicillin G, the penam 12c exhibited a spectrum extended to Gram-negative species, such as Escherichia, Shigella, Klebsiella
已经发现6个β-[((1-取代的4-吡啶基)氨基] penam-3-羧酸酯和7个β-[((1-取代的4-吡啶基)氨基] ceph-3-em-4-羧酸酯有趣的新型抗菌β-内酰胺类,可以通过SN2 Ar偶合氟取代的季铵化吡啶和合适的氨基内酰胺羧酸来获得。与青霉素G相比,penam 12c的光谱扩展到革兰氏阴性菌,如埃希氏菌,志贺氏菌,克雷伯菌和肠杆菌,被针对革兰氏阳性菌的效力丧失所抵消。除假单胞菌外,许多头孢实例均显示出对上述革兰氏阴性生物的优异活性,在某些情况下,例如15i,该光谱包括对葡萄球菌和链球菌的良好表现。由于有沙雷氏菌和许多变形杆菌,