Potassium Carbonate → Ethyl 2-ethoxy-3-{3-[3-(4-methylsulfonyloxyphenyl)propoxy]phenyl}propanoate

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Reaction Steps

3-(4-Methanesulfonyloxyphenyl)propylmethanesulfonate (1.905 g; 6.18 mmole) dissolved in acetonitrile (13 ml) was added dropwise to a mixture of 2-ethoxy-3-(3-hydroxyphenyl)propanoic acid ethyl ester (1.47 g; 6.18 mmole) and potassium carbonate (2.56 g; 18.54 mmole) in acetonitrile (15 ml). The mixture was refluxed for 5 hours, then the solvent was evaporated in vacuo and water was added. The mixture was extracted twice with dichloromethane, dried (sodium sulfate), filtered and the solvent was evaporated in vacuo. Purification by chromatography on silica gel using diethyl ether/petroleum ether (gradient 33% to 100% diethyl ether) gave 1.80 g (yield 65%) of 2-ethoxy-3-{3-[3-(4-methanesulfonyloxyphenyl)propoxy]phenyl}propanoic acid ethyl ester.

Provenance & Evidence