CS[C:3]([C:9]1[CH:14]=[CH:13][C:12]([C:15]([C:17]2[S:18][CH:19]=[CH:20][CH:21]=2)=[O:16])=[CH:11][CH:10]=1)([CH3:8])[C:4]([O:6][CH3:7])=[O:5].[Na].CS.[Cl-].[NH4+]>CO>[S:18]1[CH:19]=[CH:20][CH:21]=[C:17]1[C:15]([C:12]1[CH:13]=[CH:14][C:9]([CH:3]([CH3:8])[C:4]([O:6][CH3:7])=[O:5])=[CH:10][CH:11]=1)=[O:16]Methyl α-methylthio-α-[p-(2-thienylcarbonyl)-phenyl]propionate (288 mg) was dissolved in 1 ml of anhydrous methanol, and 1.0 ml of a methanol solution (2.34 M) of sodium salt of methyl mercaptan was added. The mixture was stirred at room temperature for 1 hour and heated under reflux for 30 minutes. After cooling, an aqueous solution of ammonium chloride (1.5 g/20 ml) was added to the reaction mixture. The mixture was extracted with 20 ml of methylene chloride and twice with 10 ml of methylene chloride. The extract was washed with 20 ml of a saturated aqueous solution of sodium hydrogen carbonate and with 10 ml of water, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to afford 117 mg of methyl α-[p-(2-thienylcarbonyl)phenyl]propionate in a yield of 47%.
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