Methanol → 2-[5-(4-Chlorophenyl)-2-ethylphenyl]-2-oxoacetic acid

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Reaction Steps

To a 50 ml volume three-necked flask, ethyl 2-[5-(4-chlorophenyl)-2-ethylphenyl]-2-oxoacetate (9-c) (1.43 g), methanol (1.9 ml), and potassium hydroxide (600 mg) dissolved in water (3 ml) were added at room temperature, then added methanol (7.6 ml) and water (3 ml), and stirred at 40° C. for 2 hours. To the mixture was added hexane and 2N aqueous potassium hydroxide solution (3 ml), and then the layers were separated. The aqueous layer was washed with hexane again. The organic layers were combined, and extracted with 2N potassium hydroxide. To the resulting aqueous layer, 10 w/w % of hydrochloric acid was added to adjust pH to less than 1, and extracted with ethyl acetate 3 times. The organic layers were combined, washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give 1.081 g of 2-[5-(4-chlorophenyl)-2-ethylphenyl]-2-oxoacetic acid (8-c).

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