Water → HCID 13850791, compound

Participants

Reaction Steps

1.3 g of 1-cyclopropylpiperazine and 2.2 g (20 mmol) of 1,4-diazabicyclo[2.2.2]octane are added to 2.8 g (10 mmol) of 7-chloro-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid in 25 ml of dimethyl sulphoxide, and the mixture is heated at 140° for 5 hours. 40 ml of water are added to the suspension and the precipitate is filtered off with suction, washed with water and boiled up with 20 ml of methanol. 1.2 g of 1-cyclopropyl-7-(4-cyclopropyl-1-piperazinyl)-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid of melting point 226°-229° (with decomposition) are obtained.

Provenance & Evidence