HCID 23431782, compound → Ethyl 5-amino-1-cyclopropyl-7-chloro-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylate

Participants

Reaction Steps

To a solution of 48.0 g of ethyl 5-benzylamino-1-cyclopropyl-7-chloro-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylate (0.111 mol) dissolved in a mixture of 200 ml of acetic acid and ethanol was added 0.5 g of 5% Pd/C catalyst. Hydrogen gas was introduced at room temperature. The reaction was monitored with TLC and carried out for around 3 hours. Precipitates collected by filtration were dissolved in chloroform and filtered to remove the catalyst. After removing the solvent by evaporation, the residue was recrystallized from a mixture of chloroform and ethanol to give 32.0 g of ethyl 5-amino-1-cyclopropyl-7-chloro-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylate (0.093 mol) in 83.9% yield.

Provenance & Evidence