Trifluoroacetic acid → HCID 24752944, compound

Participants

Reaction Steps

A mixture of 1-cyclopropyl-6,8-difluoro-1,4-dihydro-5-(4-methoxybenzylthio)-4-oxo-7-[2-(2-pyridylamino)ethylamino]quinoline-3-carboxylic acid (290 mg, 0.525 mmol) and trifluoroacetic acid (1.5 mL) in anisole (1.5 mL) was stirred at room temperature for 24 h. The mixture was concentrated in vacuo. The residue was dissolved in water (5 mL), then added saturated aq. NaHCO3 until pH=7. The resulting precipitate was combined by filtration. Recrystallization of the cake from MeOH (30 mL) gave 1-cyclopropyl-6,8-difluoro-1,4-dihydro-5-mercapto-4-oxo-7-[2-(2-pyridylamino)ethylamino]quinoline-3-carboxylic acid as a pale yellow solid (155 mg, 68%).

Provenance & Evidence