作者:Harold Mastalerz、Marcel Menard、Vivianne Vinet、James Desiderio、Joan Fung-Tomc、Robert Kessler、Yuan Tsai
DOI:10.1021/jm00401a020
日期:1988.6
The synthesis and structure-activity relationships of a series of orally absorbed O-2-isocephems are described. These compounds possessed a D-[(p-hydroxyphenyl)glycyl]amino substituent at the 7-position while the substituent at the 3-position was varied. Relative to the analogous cephems, the O-2-isocephems exhibited comparable to better activity against Gram-positive organisms. Against Gram-negative organisms, their activity was variable but did indicate a lower beta-lactamase stability. Following oral administration, the O-2-isocephems generally exhibited longer half-lives but lower Cmax's and urinary recoveries.