m-Chloroperbenzoic acid → (S)-5-bromo-6-(1-tert-butoxy-2-ethoxy-2-oxoethyl)-2,7-dimethylquinoline 1-oxide

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of (S)-ethyl 2-(5-bromo-2,7-dimethylquinolin-6-yl)-2-tert-butoxyacetate (5H) (248 mg, 0.63 mmol) in dichloromethane (8 mL) was added a solution of mCPBA (283 mg, 77%, 1.26 mmol) in DCM (5 mL) at 0° C. The mixture was stirred at 0° C. for 1 hour before quenched with NaHCO3 solution. The mixture was extracted with DCM (30 mL), washed with NaHCO3 solution, water and brine, dried over Na2SO4, filtered and concentrated in vacuo. The obtained residue was purified by flash chromatography to provide the desired product (212 mg, 82%). LCMS-ESI+ (m/z): 410.2, 412.2 (M+H)+.

Provenance & Evidence