CCO.C([O:11][C:12]1[CH:13]=[C:14]([C:24]([O:26][CH3:27])=[O:25])[CH:15]=[C:16]([C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[CH:17]=1)C1C=CC=CC=1.[H][H]>[C].[Pd].C1COCC1>[OH:11][C:12]1[CH:13]=[C:14]([C:24]([O:26][CH3:27])=[O:25])[CH:15]=[C:16]([C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[CH:17]=1In a nitrogen atmosphere, 10% palladium-carbon (900 mg) was added to a mixed solution of EtOH (40 mL)-THF (8 mL) of methyl 5-benzyloxybiphenyl-3-carboxylate (1.55 g), and stirred in a hydrogen atmosphere at room temperature for 2 hours. The reaction liquid was filtered through Celite, and concentrated under reduced pressure to obtain the title compound as a white powder. Not purified, this was used in the next step.
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