4-pyrimidinyl- or 4-pyrazinyl-piperazinyl-phenyl-oxazolidinone derivatives, their preparation and their use as anti-bacterial agents

摘要

This invention provides a novel oxazolidinone derivative represented by Formula I or pharmaceutical acceptable salts thereof: I wherein R1 is substituted or unsubstituted 2-pyrimidinyl, 4-pyrimidinyl, or 3-pyridazinyl; X is hydrogen or fluoro; R3 is C1-4 alkyl, C1-4 alkoxy, C3-6 cycloalkyl or C1-4 alkylamino or dialkylamino. The compounds are useful antimicrobial agents.