Acetic Acid → Ethyl 3-[3-(benzyloxy)phenyl]-3-oxopropanoate

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1-(3-Benzyloxyphenyl)ethanone (218 g, 966.10 mmol) was dissolved in diethyl carbonate and sodium hydride (60% oil) (46.37 g, 1.15 mmol) was slowly added thereto at 0° C., and then stirred for 3 hours at 60° C. After the reaction was completed, ice water and acetic acid were added to the reaction mixture, extracted with ethyl acetate/saturated sodium chloride, the organic layer was separated, and dried over anhydrous magnesium sulfate. The solvent was removed under a reduced pressure and the resulting residue was purified by column chromatography (ethyl acetate:hexane=1:10) to obtain 3-(3-benzyloxyphenyl)-3-oxopropionate ethyl ester (184.68 g, yield 84%) in an oil state.

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