Several 7-(3R, 4R-N, N′-dialkyl diaminopyrrolidinyl)-substituted quinolones were synthesized and evaluated for antibacterial activities. 5-Amino-7-(3R, 4R-N, N′- dimethyldiamino-6, 8-difluoro-1, 4-dihydro-1-cyclopropyl-4-oxoquinoline-3-carboxylic acid was found to have potent antibacterial activity against gram+ ve organïsms.