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]=[C:24]([O:26][CH3:27])[CH:23]=[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]=[C:24]([O:26][CH3:27])[CH:23]=[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-4-methoxyphenyl)boronic acid (896 mg, 5.0 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 16 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.
Wird geladen…