[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([S:8][CH2:9][CH2:10][CH2:11][C:12]([OH:14])=[O:13])=[CH:4][CH:3]=1.C[O-].[Na+:17]>C(O)(C)C>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([S:8][CH2:9][CH2:10][CH2:11][C:12]([O-:14])=[O:13])=[CH:4][CH:3]=1.[Na+:17]A hot solution of 13.8 g of 4-(p-chlorophenylthio)butyric acid was added to a hot solution of 3.2 g of sodium methoxide in 50 ml of isopropanol. The resulting mixture was cooled and filtered. The air-dried solid weighed 14.4 g.
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