Hydrochloric Acid → HCID 15870851, compound

Participants

Reaction Steps

In 3.2 ml of 30% hydrogen bromide-acetic acid solution was suspended 0.16 g of 7-[2-(benzyloxycarbonyl)isoindolin-5-yl]-1-cyclopropyl-6-fluoro-8-fluoromethyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, and the suspension was stirred at room temperature for 40 minutes. The reaction mixture was concentrated under reduced pressure and to the residue was added ethanol, and the crystals formed were collected by filtration. The crystals obtained were dissolved in dilute aqueous sodium hydroxide solution, and the pH was adjusted to 7 with dilute hydrochloric acid. The crystals precipitated were collected by filtration, to obtain 68 mg of colorless, crystalline 1-cyclopropyl-6-fluoro-8-fluoromethyl-7-(isoindolin-5-yl)-1,4-dihydro-4-oxoquinoline-3-carboxylic acid.

Provenance & Evidence