Synthesis and antibacterial activity of [6,5,5] and [6,6,5] tricyclic fused oxazolidinones

Abstract A series of conformationally restricted, [6,5,5] and [6,6,5] tricyclic fused oxazolidinones were synthesized and tested for antibacterial activity. Several compounds in the trans -[6,5,5] series demonstrated potent in vitro and in vivo activity. This work provides valuable information regarding the preferred conformational orientation of the oxazolidinones at the binding site.