Synthesis and Biological Evaluation of Coumarin Linked Fluoroquinolones, Phthalimides and Naphthalimides as Potential DNA Gyrase Inhibitors

A hybrid molecule synthesis strategy is employed to develop new molecules with potential antibacterial activity. Three types of coumarin-linked hybrids have been synthesized. The coumarin ring system has been linked to phthalimido, naphthalimido and quinolone moieties at 4-position through piperazino alkane spacers. These compounds have been evaluated for their antibacterial activity. Some of these new hybrids particularly phthalimido and naphthalimido ones have exhibited DNA gyrase inhibition activity.