[CH3:1][O:2][C:3]1[CH:11]=[CH:10][C:6]([C:7](Cl)=[O:8])=[CH:5][CH:4]=1.Br[C:13]1[CH:21]=[CH:20][C:19]([CH3:22])=[CH:18][C:14]=1[C:15]([OH:17])=[O:16]>>[CH3:1][O:2][C:3]1[CH:11]=[CH:10][C:6]([C:7]([C:13]2[CH:21]=[CH:20][C:19]([CH3:22])=[CH:18][C:14]=2[C:15]([OH:17])=[O:16])=[O:8])=[CH:5][CH:4]=1This compound is obtained according to the procedure described in 1.1. by reacting 4-methoxybenzoyl chloride and 2-bromo-5-methylbenzoic acid after halogen-lithium exchange. It is used in crude form in the following reaction.
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