Potassium Carbonate → 1-(2,4-Difluoro-benzyl)-6-[5-(6-methylsulfanyl-pyridin-3-yl)-thiophen-2-yl]-2-oxo-4-trifluoromethyl-1,2-dihydro-pyridine-3-carbonitrile

Participants

Reaction Conditions

Reaction Steps

6-(5-Bromo-thiophen-2-yl)-1-(2,4-difluoro-benzyl)-2-oxo-4-trifluoromethyl-1,2-dihydro-pyridine-3-carbonitrile (270 mg, 0.57 mmol), 2-methylsulfanyl-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)pyridine (214 mg, 0.85 mmol), potassium carbonate (236 mg, 1.71 mmol), and tetrakis(triphenylphosphine)palladium (0) (66 mg, 0.057 mmol) were mixed with 6 ml 9:1 DME/H2O (v/v), then heated at 80° C. overnight. All solvent was removed in vacuo. The crude product was purified by column chromatography on silica gel (10→40% EtOAC/Hexane, 0.25% Et3N in hexane) to give 1-(2,4-difluoro-benzyl)-6-[5-(6-methylsulfanyl-pyridin-3-yl)-thiophen-2-yl]-2-oxo-4-trifluoromethyl-1,2-dihydro-pyridine-3-carbonitrile as an orange solid (276 mg, 93% yield). 1H-NMR (400 MHz, CDCl3): δ 2.61 (s, 3H), 5.45 (s, 2H), 6.66 (s, 1H), 6.82 (m, 1H), 6.88 (m, 1H), 7.09 (m, 1H), 7.12 (d, 1H, J=3.9), 7.27 (m, 2H, mixed with CDCl3), 7.64 (dd, 1H, J=2.4, J=8.4), 8.67 (dd, 1H, J=2.4, J=0.8).

Provenance & Evidence