[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]=[C:7]([C:12](OC)=[O:13])[CH:6]=[CH:5]2.[H-].C([Al+]CC(C)C)C(C)C.C(=O)(O)[O-].[Na+]>C1COCC1>[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]=[C:7]([CH2:12][OH:13])[CH:6]=[CH:5]2Methyl 6-bromo-2-naphthoate (5 g, 18.9 mmol) was dissolved in purified THF (100 mL) under a nitrogen atmosphere, the reaction solution was cooled down to 0° C., and then diisobutyl aluminum hydride (18.9 mL, 1.0M hexane solution) was added thereto. The reaction mixture solution was stirred at room temperature for 3 hours. Sodium bicarbonate (20 mL) was added to the reaction mixture solution, and then the solvent was removed by extraction with water and dichloromethane. The extracted material was dried in vacuum to thereby obtain a white solid (4.3 g, yield: 95%).
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