Water → 1-Cyclopropyl-7-(4-ethyl-1-piperazinyl)-6,8-difluoro-1,4-dihydro-4-oxo-5-vinyl-3-quinolinecarboxylic acid

Participants

Reaction Steps

0.93 g of 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-5-vinyl-3-quinolinecarboxylic acid, 0.51 g of 4-ethyl-1,4-piperazine and 0.34 g of DABCO are refluxed for 2.5 hours in a mixture of 6 ml of acetonitrile and 3 ml of dimethylformamide. At room temperature, the reaction mixture is treated with 15 ml of water, and the product is filtered off with suction, washed with water and dried. 0.79 g of 1-cyclopropyl-7-(4-ethyl-1-piperazinyl)-6,8-difluoro-1,4-dihydro-4-oxo-5-vinyl-3-quinolinecarboxylic acid is obtained.

Provenance & Evidence