Br[C:2]1[C:6]2[CH:7]=[C:8]([C:11]([O:13][CH3:14])=[O:12])[CH:9]=[CH:10][C:5]=2[O:4][CH:3]=1.[Cl:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=1B(O)O>>[Cl:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=1[C:2]1[C:6]2[CH:7]=[C:8]([C:11]([O:13][CH3:14])=[O:12])[CH:9]=[CH:10][C:5]=2[O:4][CH:3]=1In the same manner as in Reference Example 19 and using methyl 3-bromo-1-benzofuran-5-carboxylate instead of methyl 3-iodoimidazo[1,2-a]pyridine-6-carboxylate and (2-chlorophenyl)boronic acid instead of (4-methoxyphenyl)boronic acid, the title compound (yield 92%) was obtained as colorless crystals.
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