Ethanol → 1-{5-Chloro-2-ethoxy-4-fluoro-3-[5-(methylsulfonyl)pyridin-3-yl]phenyl}ethanone

Participants

Reaction Conditions

Reaction Steps

A solution of 1-{5-chloro-4-fluoro-2-hydroxy-3-[5-(methylsulfonyl)pyridin-3-yl]phenyl}ethanone (1.3 g, 3.6 mmol) in THF (32 mL) was treated with ethanol (0.28 mL, 4.73 mmol) and triphenylphosphine (1.3 g, 5.1 mmol). The reaction mixture was cooled to 0° C., treated with diisopropyl azodicarboxylate (1.1 mL, 5.5 mmol) dropwise, and stirred at 20° C. for 1 hour. The reaction mixture was concentrated to remove most of the THF, diluted with EtOAc, washed with saturated sodium bicarbonate, water, brine, dried over sodium sulfate, filtered and concentrated to a crude residue which was purified by flash column chromatography using EtOAc in hexanes (15%-65%) to give the desired product (1.2 g, 87%). LCMS for C16H16ClFNO4S (M+H)+: m/z=372.0. Found: 372.1.

Provenance & Evidence