Br[C:2]1[CH:3]=[CH:4][C:5]([C:8]([NH:10][CH2:11][CH2:12][C:13]([O:15][CH2:16][CH3:17])=[O:14])=[O:9])=[N:6][CH:7]=1.[CH:18]([C:20]1[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][C:21]=1B(O)O)=[O:19].C([O-])([O-])=O.[K+].[K+].O>O1CCOCC1.CCOC(C)=O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH:18]([C:20]1[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][C:21]=1[C:2]1[CH:3]=[CH:4][C:5]([C:8]([NH:10][CH2:11][CH2:12][C:13]([O:15][CH2:16][CH3:17])=[O:14])=[O:9])=[N:6][CH:7]=1)=[O:19]Ethyl 3-(5-bromopicolinamido)propanoate (1.0 g, 3.3 mmol), (2-formyl-5-methoxyphenyl)boronic acid (777 mg, 4.3 mmol), Pd(dppf)Cl2 (364 mg, 0.5 mmol), and K2CO3 (918 mg, 6.6 mmol) were dissolved in 1,4-dioxane (20 mL) and water (5 mL) and heated to 80° C. After 2 h the resulting mixture was cooled to room temperature, diluted with EtOAc washed with water and brine, dried (Na2SO4), concentrated and purified via column chromatography to yield the title compound.
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