Pyrazolo(1,5-a)pyrimidinium substituted cephem derivatives, their preparation and their use as antimicrobial agents
申请人:KATAYAMA SEIYAKUSYO CO. Ltd.
公开号:EP0771803A1
公开(公告)日:1997-05-07
The present invention relates to novel cephem compounds of formula (I):
wherein R1 is hydrogen or an amino protecting group; R2 is hydrogen, a lower or fluoromethyl; R3 is hydrogen, a lower alkyl, carboxyl or a protected carboxyl group; R4 is hydrogen or a lower alkyl; R5 is hydrogen, an anion or a carboxyl-protecting group; A is methylene or propenylene; X is an organic or inorganic anion, provided that X is excluded when R5 is an anion; Q is nitrogen or CH, and the wavy line represents a bond of anti-form or syn-form, or a pharmaceutically acceptable salt thereof, their preparation and their use as antimicrobial agents, particularly, against Methicillin-Resistant Stapylococcus aureus (MRSA) and antimultipledrug-resistant bacteria.
In a further aspect, the invention provides the compound of formula (V):
which is a novel compound and an intermediate for producing of the compounds of formula (I).
本发明涉及式(I)的新型头孢化合物:
其中 R1 是氢或氨基保护基;R2 是氢、低级烷基或氟甲基;R3 是氢、低级烷基、羧基或受保护的羧基;R4 是氢或低级烷基;R5 是氢、阴离子或羧基保护基;A 是亚甲基或亚丙烯;X 是有机或无机阴离子,但当 R5 是阴离子时,X 不包括在内;Q是氮或CH,波浪线代表反式或合式的键,或其药学上可接受的盐,它们的制备及其作为抗菌剂的用途,特别是抗耐甲氧西林金黄色葡萄球菌(MRSA)和抗多重耐药菌。
在另一个方面,本发明提供了式 (V) 的化合物:
这是一种新型化合物,也是生产式(I)化合物的中间体。