3-fluoro-4-[(E)-3-oxo-3-(2-phenylamino-pyridin-3-yl)-propenyl]-benzoic acid methyl ester → 3-Fluoro-4-[3-oxo-3-(2-phenylamino-pyridin-3-yl)-propyl]-benzoic acid methyl ester

Beteiligte Stoffe

Reaktionsschritte

A solution of 3-fluoro-4-[(E)-3-oxo-3-(2-phenylamino-pyridin-3-yl)-propenyl]-benzoic acid methyl ester (890 mg, 2.36 mmol) in methanol (59.1 mL) and ethyl acetate (59.1 mL) at 25° C. was treated with platinum(IV) oxide (26.8 mg, 118 μmol). The reaction was stirred under a balloon of hydrogen gas for 18 h. At this time, the reaction was filtered through a pad of Celite® and was rinsed with a solution of 10% methanol/methylene chloride (3×75 mL). The filtrate was concentrated in vacuo to afford 3-fluoro-4-[3-oxo-3-(2-phenylamino-pyridin-3-yl)-propyl]-benzoic acid methyl ester (860 mg, 96.2%) as a dark green solid. The material was used without further purification.

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