C[O:2][C:3](=[O:26])[C:4](=[O:25])[C:5]1[CH:10]=[CH:9][C:8]([O:11][CH2:12][CH2:13][O:14][C:15]2[CH:24]=[CH:23][C:22]3[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=3)[CH:16]=2)=[CH:7][CH:6]=1.[OH-].[Na+:28]>C(O)C>[Na+:28].[CH:16]1[C:17]2[C:22](=[CH:21][CH:20]=[CH:19][CH:18]=2)[CH:23]=[CH:24][C:15]=1[O:14][CH2:13][CH2:12][O:11][C:8]1[CH:9]=[CH:10][C:5]([C:4](=[O:25])[C:3]([O-:26])=[O:2])=[CH:6][CH:7]=1A mixture of 4-[[2-(2-naphthalenyloxy)ethyl]oxy]-alpha-oxobenzeneacetic acid methyl ester (3.2 g) in 95% ethanol (700 mL) was heated at reflux and 1N sodium hydroxide (15 mL) was added dropwise. Heating was continued for five minutes and the resulting mixture was chilled in ice, filtered, washed with water and dried at 80° C. over phosphorus pentoxide at 0.1 mm to give 3.2 g of colorless 4-[[2-(2-naphthalenyloxy)ethyl]oxy]-alphaoxobenzeneacetic acid sodium salt, mp>295° C. with decomposition.
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