Ethanol → HCID 59003053, compound

Participants

Reaction Steps

A mixture of 5-Amino-1-cyclopropyl-6-fluoro-1,4-dihydro-8-methoxy-4-oxo-7-[2-(2-pyridylamino)ethylamino]quinoline-3-carboxylic acid (428 mg, 1.00 mmol) and concentrated H2SO4 (1.0 mL) in EtOH (15 mL) was refluxed for 8 h. After cooling, the mixture was poured into ice water (100 mL). Saturated aq. NaHCO3 (50 mL) was added and the crude product was extracted with CH2Cl2 (2×50 mL). The extraction mixture washed with brine, dried over Na2SO4 and concentrated in vacuo. The residue was purified by column chromatography (Chromatorex NH-DM2035 (Fuji Sylysia Chemical Co., Ltd.), EtOAc) to give ethyl 5-amino-1-cyclopropyl-6-fluoro-1,4-dihydro-8-methoxy-4-oxo-7-[2-(2-pyridylamino)ethylamino]quinoline-3-carboxylate (311 mg, 44%) as a pale yellow solid.

Provenance & Evidence