Piperazine → 7-(1-Piperazinyl)-1-cyclopropyl-6-fluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

Participants

Reaction Steps

A suspension of 0.70 g (2.50 mmol) of 1-cyclopropyl-6,7-difluoro-1,4-dihydro-5-methyl-4-oxo-3-quinolinecarboxylic acid, 0.86 g (10.0 mmol) of anhydrous piperazine and 20 mL of acetonitrile was refluxed for 5 hours, then stirred at room temperature overnight. The precipitate was collected by filtration, washed with water and acetonitrile, and dried in vacuo to give 0.85 g of the title compound, mp 226°-228 ° C.

Provenance & Evidence