Sodium Carbonate → 5-(1-phenyl-1H-1,3-benzodiazol-5-yl)-1-[3-(piperidin-1-yl)propyl]-1,2-dihydropyridin-2-one

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Reaction Conditions

Reaction Steps

5-iodo-1-(3-piperidin-1-yl-propyl)-1H-pyridin-2-one (18) (0.096 g, 0.28 mmol), 1-phenyl-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-benzoimidazole (0.081 g, 0.25 mmol), palladium(II) acetate (0.003 g, 0.013 mmol), triphenylphosphine (0.010 g, 0.038 mmol) and sodium carbonate (0,080 g, 0.75 mmol) were stirred in 1.6 mL of a 3:1 mixture of dioxane/water. The mixture was degassed 3× by alternating vacuum and an argon atmosphere. The reaction was heated to 80° C. for 18 h, cooled and diluted with water. The aqueous phase was extracted 3× with EtOAc and the resulting organic phase was dried over Na2SO4, filtered and concentrated. Purification by flash column chromatography (eluted with 85:15 CH2Cl2/MeOH) afforded 0.073 g 5-(1-phenyl-1H-benzoimidazol-5-yl)-1-(3-piperidin-1-yl-propyl)-1H-pyridin-2-one (19) (71% yield). 1H NMR (CDCl3) δ9.60 (s, 1H), 7.90 (d, J=1.3 Hz, 1H), 7.74-7.67 (m, 2H), 7.64-7.48 (m, 6H), 7.39 (dd, J=2.5, 9.5 Hz, 1H), 6.68 (d, J=9.5 Hz, 1H), 4.13 (t, J=6.5 Hz, 2H), 2.42 (bs, 6H), 2.10 (t, J=6.5 Hz, 2H), 1.64 (m, 4H), 1.46 (m, 2H). Mass Spectrometry (for C26H28N4O): [M+H]+413.2334, theoretical 413.2336.

Provenance & Evidence