Water → 1-Cyclopropyl-6,7-difluoro-8-(1-hexinyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid

Participants

Reaction Steps

0.7 g of ethyl 1-cyclopropyl-6,7-difluoro-8-(1-hexinyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylate is refluxed for 3 hours in a mixture of 6 ml of glacial acetic acid, 0.5 ml of water and 0.1 ml of concentrated sulphuric acid. The reaction mixture is treated with 100 ml of water, and the solid is filtered off with suction and dried. 0.5 g of 1-cyclopropyl-6,7-difluoro-8-(1-hexinyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid is obtained (85% of theory).

Provenance & Evidence