Ethyl Acetate → (6-Bromo-4-chloro-7-fluoroquinolin-3-yl)(cyclopropyl)methanone

Participants

Reaction Steps

(6-Bromo-7-fluoro-4-hydroxyquinolin-3-yl)(cyclopropyl)methanone (3.35 g, 10.8 mmol) was suspended in phosphoryl chloride (10 mL) at 0° C. The reaction was warmed to room temperature and stirred overnight. After this time 2M ammonium hydroxide was added dropwise until a solid formed. Ethyl acetate was added and the layers were separated. The organic layer was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by column chromatography to afford the desired product (1.5 g, 42%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.92 (s, 1H), 8.63 (d, J=7.2 Hz, 1H), 7.84 (d, J=8.9 Hz, 1H), 2.70-2.45 (m, 1H), 1.55-1.35 (m, 2H), 1.35-1.05 (m, 2H).

Provenance & Evidence