Synthesis and in vitro antibacterial activities of novel oxazolidinones

Design and synthesis of novel piperazinylaryloxazolidinones possessing heteroaryl groups are described and their in vitro antibacterial activities have been evaluated by MIC assay. Compounds ( S)- N-[3-{3-fluoro-4-[4-[3-(5-nitrofuran-2-yl)-acryloyl]-piperazin-1-yl]-phenyl}-2-oxo-oxazolidin-5-yl-methyl] acetamide ( 6o), ( S)- N-[3-{3-fluoro-4-[4-[3-(5-nitrothien-2-yl)-acryloyl]-piperazin-1-yl]-phenyl}-2-oxo-oxazolidin-5-yl-methyl] acetamide ( 6p) and N-oxide of ( S)- N-[3-{3-fluoro-4-[4-[3-(5-nitrofuran-2-yl)-acryloyl]-piperazin-1-yl]-phenyl}-2-oxo-oxazolidin-5-yl-methyl] acetamide ( 9) showed superior antibacterial activities than linezolid and also active against the linezolid resistant Staphylococcus aureus strains. A number of novel piperazinylaryloxazolidinones possessing heteroaryl groups have been synthesized and their antibacterial activities were evaluated by MIC assay. [Display omitted]