[CH3:1][S:2]([NH:5][CH2:6][C:7]1[CH:12]=[CH:11][C:10]([CH:13]([CH3:19])[C:14]([O:16]CC)=[O:15])=[CH:9][CH:8]=1)(=[O:4])=[O:3].O1CCCC1.O.[OH-].[Na+]>C(OCC)(=O)C.C(O)(=O)C>[CH3:1][S:2]([NH:5][CH2:6][C:7]1[CH:12]=[CH:11][C:10]([CH:13]([CH3:19])[C:14]([OH:16])=[O:15])=[CH:9][CH:8]=1)(=[O:4])=[O:3]
To a stirred solution of ethyl 2-(4-(methylsulfonamidomethyl)phenyl)propanoate (325 mg, 1.139 mmol) in co-solvent with tetrahydrofuran and water (1:1) were added sodium hydroxide (114 mg, 2.8475 mmol). The reaction mixture was refluxed for 16 h, then cooled to room temperature, acidified to pH 3-4 with acetic acid. The residue dissolved in ethyl acetate and washed with water and brine. The organic layer was dried over magnesium sulfate and filtered. The filtrate removed in vacuo. The crude was purified by column chromatography to give 2-(4-(methylsulfonamidomethyl)phenyl)propanoic acid (74 mg, 25%).
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