β-Lactam antibiotics of the formula (Ia) or pharmaceutically acceptable salts or pharmaceutically acceptable in vivo hydrolysable esters thereof, and the use thereof, are disclosed:
wherein
R is hydrogen, methoxy or formamido;
R¹ is an acyl group, in particular that of an antibacterially active cephalosporin;
R² is optionally substituted alkyl, acyl, alkoxycarbonyl, halogen, aryl, heterocyclyl, carboxy, carboxamido, or cyano; CO₂R₃ is carboxy or a carboxylate anion; X is S,SO,SO₂,O or CH₂; and n is zero or an integer from 1 to 5.
Processes for the preparation of compounds together with intermediates for use therein are disclosed.
本发明公开了式 (Ia) 的 β-内酰胺类抗生素或其药学上可接受的盐或药学上可接受的体内可
水解酯及其用途:
其中
R 是氢、甲氧基或甲酰胺基;
R¹ 是酰基,特别是抗菌活性
头孢菌素的酰基;
R²是任选取代的烷基、酰基、烷氧羰基、卤素、芳基、杂环基、羧基、羧
氨基或
氰基;CO₂R₃是羧基或
羧酸根阴离子;X是S、SO、SO₂、O或CH₂;n是零或1至5的整数。
本发明公开了化合物及其中间体的制备方法。