[Cl:1][CH2:2][CH2:3][CH2:4][O:5][C:6]1[CH:7]=[C:8]([CH2:12][C:13]([O:15]C)=[O:14])[CH:9]=[CH:10][CH:11]=1.[OH-].[Na+]>>[Cl:1][CH2:2][CH2:3][CH2:4][O:5][C:6]1[CH:7]=[C:8]([CH2:12][C:13]([OH:15])=[O:14])[CH:9]=[CH:10][CH:11]=1A mixture of methyl 2-[3-(3-chloropropoxy)phenyl]acetate (4.95 g, 0.02 moles) and a solution of 1N sodium hydroxide (0.02 moles) was stirred at room temperature for 24 hours. After acidification the acid separated as white powder (4.53 g, 97% yield)
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