Compounds of the formula
and pharmaceutically acceptable acid addition salts thereof, wherein
R¹ is hydrogen, (C₁-C₆)alkyl, or a pharmaceutically acceptable cation;
R² is ethyl, fluoroethyl, p-fluorophenyl, p-hydroxyphenyl or cyclopropyl;
R³ is fluorine or hydrogen; and
R⁴ is
wherein n is 1 or 2 and R⁵ is hydrogen or (C₁-C₃)alkyl are disclosed. Also disclosed are antibacterial pharmaceutical compositions comprising the foregoing compounds, methods of using the compounds in treating bacterial infections, and intermediates for the preparation of the compounds.
式化合物
及其药学上可接受的酸加成盐,其中
R¹ 是氢、(C₁-C₆)烷基或药学上可接受的阳离子;
R² 是乙基、
氟乙基、对
氟苯基、对羟基苯基或环丙基;
R³ 是
氟或氢;以及
R⁴ 是
其中 n 为 1 或 2,R⁵ 为氢或 (C₁-C₃)烷基。还公开了包含前述化合物的抗菌药物组合物、使用这些化合物治疗细菌感染的方法以及制备这些化合物的中间体。