Triethylamine → 6-Bromo-2-(1-(difluoromethyl)-1H-pyrazol-4-yl)-1-(methylsulfonyl)-1H-pyrrolo[3,2-c]pyridine

Participants

Reaction Conditions

Reaction Steps

1-(Difluoromethyl)-4-ethynyl-1H-pyrazole (Preparation 152, 187 mg 1.31 mmole) was dissolved in DMF (4.2 mL) and N-(2-bromo-5-iodopyridin-4-yl)methanesulfonamide (Preparation 8, 444 mg 1.17 mmole) was added. To the solution was added triethylamine (0.80 mL, 576 mg 5.7 mmole) and copper(I) iodide (9 mg 0.047 mmole). The reaction was sealed and flushed with nitrogen. Bis(triphenylphosphine)palladium dichloride (37.6 mg 0.046 mmole) was added and the reaction was again flushed with nitrogen, then heated at 60° C. for 140 minutes. The reaction was added to ethyl acetate (45 mL) and washed with water (3×15 mL) and with brine, then dried and concentrated in vacuo. The residue was purified using preparative TLC eluting with 5% ethyl acetate in chloroform to afford the title compound 157 mg. 1H-NMR (d6-acetone, 500 MHz): δ 3.37 (s, 3H), 7.06 (d, J=0.63 Hz, 1H), 7.70 (t, J=59.6 Hz, 1H), 8.04 (s, 1H), 8.16 (m, 1H), 8.51 (s, 1H), 8.73 (d, J=0.95 Hz, 1H).

Provenance & Evidence