申请人:LUCKY LTD.
公开号:EP0604920A1
公开(公告)日:1994-07-06
The present invention relates to novel cephalosporin compounds, pharmaceutically acceptable non-toxic salts, physiologically hydrolyzable esters, hydrates and solvates and isomers thereof which possess potent and broad antibacterial activities. The compounds of the present invention have a (4-amino-1-substituted-alkapyrimidinium-4-yl)thiomethyl group in 3-position of the cephem nucleus and is specifically represented by the following formula(I):
wherein:
R¹ isa hydrogen atom or, a C₁₋₄ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl or -C(RA)(RB)COOH group wherein RA and RB are independently a hydrogen atom or a C₁₋₄ alkyl group, or form a C₃₋₇ cycloalkyl group together with the carbon atom to which they are attached;
R² isan unsubstituted or substituted amino, C₁₋₄ alkyl or C₃₋₇ cycloalkyl group; and
n isan integer ranging from 2 to 7.
本发明涉及新型头孢菌素化合物,其具有强大和广泛的抗菌活性的药用可接受的无毒盐、生理水解酯、水合物、溶剂合物和其异构体。本发明的化合物在头孢菌素核的3-位置具有(4-氨基-1-取代-烷基嘧啶-4-基)硫甲基基团,具体由以下式(I)表示:其中:R¹是氢原子或C₁₋₄烷基、C₂₋₄烯基、C₂₋₄炔基或-C(RA)(RB)COOH基团,其中RA和RB独立地是氢原子或C₁₋₄烷基,或者与它们所连接的碳原子一起形成C₃₋₇环烷基基团;R²是未取代或取代的氨基、C₁₋₄烷基或C₃₋₇环烷基基团;n是一个范围从2到7的整数。