Alumina → 4-Chloro-5,7-difluoro-3-methyl-2-(2-(methylsulfonyl)phenyl)quinoline

Participants

Reaction Conditions

Reaction Steps

The 4-chloro-5,7-difluoro-3-methyl-2-(2-(methylthio)phenyl)quinoline (300 mg, 0.893 mmol) was dissolved in chloroform (8 mL) and Oxone™ (1.65 g, 2.68 mmol) and wet aluminum(III) oxide (910 mg, 8.90 mmol) was added. The heterogeneous mixture was stirred vigorously at 65° C. and refluxed for five h. Another portion of Oxone™ (1.65 g, 2.68 mmol) and aluminum(III) oxide (910 mg, 8.90 mmol) was added and the reaction was stirred vigorously overnight at 65° C. The reaction was cooled to rt and slurried in DCM and filtered. The filtrate was concentrated and the crude product was purified by medium pressure chromatography (silica gel, 0 to 50% EtOAc:hexanes) to give 4-chloro-5,7-difluoro-3-methyl-2-(2-(methylsulfonyl)phenyl)quinoline. Mass Spectrum (ESI) m/e=368.0 (M+1).

Provenance & Evidence