10-(3-cyclopropylaminomethyl-1-pyrrolidinyl)pyridobenzoxazinecarboxylic acid derivative effective against resistant bacterium
申请人:Asahina Yoshikazu
公开号:US20050182052A1
公开(公告)日:2005-08-18
A compound as represented by the general formula (I) shown below exhibits high antibacterial activity against gram-positive bacteria, in particular, such drug-resistant bacteria as mRNA, PRSP and VRE:
wherein R1 is a methyl group, a fluoromethyl group, a methoxymethyl group, an acetoxymethyl group, a hydroxymethyl group or a methylene; R2 is a hydrogen atom, a lower alkyl group having 1 to 3 carbon atoms, or a pharmaceutically acceptable cation and an ester of a prodrug; R3 is a hydrogen atom or a halogen atom; R4 is a hydrogen atom, a lower alkyl group having 1 to 3 carbon atoms, a fluoromethyl group, a trifluoromethyl group or a fluorine atom; and R5 is a hydrogen atom or a fluorine atom, with exceptions where R1 is a methyl group, R4 and R5 are at the same time a hydrogen atom, and R3 is a fluorine atom.
下列通式(I)所代表的化合物对革兰氏阳性细菌表现出高度的抗菌活性,特别是对那些耐药菌如mRNA、PRSP和VRE:
其中,R1是甲基、氟甲基、甲氧甲基、乙酰氧甲基、羟甲基或亚甲基;R2是氢原子、具有1至3个碳原子的低烷基或药学上可接受的阳离子和前药的酯;R3是氢原子或卤素原子;R4是氢原子、具有1至3个碳原子的低烷基、氟甲基、三氟甲基或氟原子;R5是氢原子或氟原子,除非R1是甲基、R4和R5同时为氢原子,且R3是氟原子的情况。