Phenylglyoxylic Acid → 1-(2,2-difluoroethyl)-3-phenyl-quinoxalin-2(1H)-one

Participants

Reaction Steps

To a solution of 400 mg (2.32 mM) of N-(2,2-difluoroethyl)benzene-1,2-diamine in 7 ml of methanol were added 349 mg (2.32 mM) of 2-Oxo-2-phenylacetic acid. The mixture was refluxed for 3 h and the solvent was then removed under vacuum. The residue was further purified by silica gel column chromatography using dichloromethane/cyclohexane as eluant, to give 231.8 mg of 1-(2,2-difluoroethyl)-3-phenyl-quinoxalin-2(1H)-one as a pale beige solid. Yield: 35%.

Provenance & Evidence