Dichloromethane → 3-bromo-5-[(E)-C-[(2R)-2-(4-bromophenyl)-2-(2-methylphenyl)ethyl]-N-hydroxycarbonimidoyl]-1-methylpyridin-2-one

Participants

Reaction Conditions

Reaction Steps

To a suspension of (R)-3-bromo-5-(3-(4-bromophenyl)-3-o-tolylpropanoyl)-1-methylpyridin-2(1H)-one in ethanol (2.5 mL) and water (0.1 mL) were added sodium bicarbonate (30.9 mg) and hydroxylamine hydrochloride (32.0 mg) and the reaction mixture was stirred at reflux (100° C. oil bath temperature) for 2 hours. The reaction mixture was poured on water and dichloromethane and the layers were separated. The aqueous layer was extracted twice with dichloromethane. The combined organic layers were washed with brine, dried over magnesium sulfate, filtered, treated with silica gel and evaporated. The compound was purified by silica gel chromatography using a MPLC system (10 g silica gel column, CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane/ethyl acetate (100:0 to 50:50) to give the title compound as a white solid, MS (ESI+): m/z=504.99 [M+H]+.

Provenance & Evidence