Water → HCID 117737171, compound

Participants

Reaction Steps

A RBF was charged with 6-(benzylthio)-1-(4-bromo-2-methoxy-5-methylphenyl)quinolin-2(1H)-one (4.23 g, 9.07 mmol), DCM (71.1 ml), acetic acid (2.67 ml), and water (1.778 ml) to give clear, light-brown. The flask was cooled in an ice-water bath for 10 min, then 1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione (3.66 g, 18.59 mmol) was added in one portion. After 40 min, an additional portion of oxidant (850 mg) was added. The mixture was stirred for another 20 min, then 2,3,4,5,6-pentafluorophenol (2.504 g, 13.60 mmol) and triethylamine (5.06 ml, 36.3 mmol) (added dropwise) were added in sequence. After 20 min, the mixture was diluted with water. The layers were separated, and the aq. layer was extracted with DCM (1×). The combined organic extracts were dried over sodium sulfate, filtered, and concentrated. The residue was purified by chromatography on silica gel (80-g Redi-Sep Gold column, 25-g silica gel loading column, 10-60% EtOAc/Heptane with 10% DCM). Fractions containing the main spot were combined and concentrated to give an off-white foam. LCMS and NMR showed that it was contaminated with 30 mol % of the peak with a mass of 425. This was equal to 82 wt % purity. This meant a yield of product: perfluorophenyl 1-(4-bromo-2-methoxy-5-methylphenyl)-2-oxo-1,2-dihydroquinoline-6-sulfonate (3.37 g, 5.71 mmol, 62.9% yield). m/z (ESI) 590.0 (M+H)+.

Provenance & Evidence