FC(F)(F)C(O)=O.[OH:8][C:9]1[CH:36]=[CH:35][C:34]([O:37][C:38]2[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=2)=[CH:33][C:10]=1[C:11]([NH:13][C:14]1[CH:26]=[C:25]([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[CH:24]=[CH:23][C:15]=1[C:16]([O:18]C(C)(C)C)=[O:17])=[O:12]>>[OH:8][C:9]1[CH:36]=[CH:35][C:34]([O:37][C:38]2[CH:39]=[CH:40][CH:41]=[CH:42][CH:43]=2)=[CH:33][C:10]=1[C:11]([NH:13][C:14]1[CH:26]=[C:25]([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[CH:24]=[CH:23][C:15]=1[C:16]([OH:18])=[O:17])=[O:12]Trifluoroacetic acid (2.0 mL) was added to the obtained tert-butyl 2-(2-hydroxy-5-phenoxybenzamido)-4-phenylbenzoate (0.017 g), followed by stirring at room temperature for 3 hours. The solvent was evaporated under reduced pressure, and diisopropyl ether was added to the obtained residue. The solid substance was collected by filtration to obtain 0.012 g of 2-(2-hydroxy-5-phenoxybenzamido)-4-phenylbenzoic acid as a white solid.
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