Ammonium Carbonate → Ethyl 6-amino-1-cyclopropyl-7-fluoro-1,4-dihydro-8-methoxy-5-nitro-4-oxoquinoline-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of ethyl 1-cyclopropyl-6,7-difluoro-1,4-dihydro-8-methoxy-5-nitro-4-oxoquinoline-3-carboxylate (5.00 g, 13.5 mmol) and ammonium carbonate (11.7 g, 122 mmol) in DMF (50 mL) was stirred at 90° C. for 18 h. After the reaction mixture was poured into ice-water, the crude product was extracted with CH2Cl2, washed with brine, dried over MgSO4 and the solvent was removed in vacuo. The crude product washed with EtOH and dried to yield ethyl 6-amino-1-cyclopropyl-7-fluoro-1,4-dihydro-8-methoxy-5-nitro-4-oxoquinoline-3-carboxylate (2.55 g, 52%) as a yellow solid.

Provenance & Evidence