An Improved Non-chromatographic Scale-up Synthesis of a New 1,6,7,8-Substituted-4-oxo-1,4-dihydroquinoline-3-carboxylic Acid as a Potent Bacterial Topoisomerase Inhibitor

7-[4-(2-Amino-1-chloroethylidene)piperidin-1-yl]-1-cyclopropyl-6-fluoro-8-methoxy-4- oxo-1,4-dihydroquinoline-3-carboxylic acid (10) is a potent bacterial topoisomerase inhibitor. In vitro, compoun...