Potassium Carbonate → 5-chloro-6-methyl-N-(4-(trifluoromethoxy)phenyl)nicotinamide

Participants

Reaction Conditions

Reaction Steps

5,6-dichloro-N-(4-(trifluoromethoxy)phenyl)nicotinamide (Stage 43.2, 500 mg, 1.424 mmol), trimethylboroxime (179 mg, 1.424 mmol), Pd(PPh3)4, (165 mg, 0.142 mmol), K2CO3 (295 mg, 2.136 mmol) and dioxane (4069 μL) were added to a vial, which was sealed, evacuated/purged with argon and the RM was stirred at 110° C. for 72 h. The RM was filtered through a pad of Celite®, which was washed with EtOAc. The combined filtrates were evaporated to dryness under reduced pressure and the residue was purified by flash chromatography (Silica gel column, 24 g, cyclohexane/EtOAc-EtOH (9:1)+0.1% NH4OH, gradient from 5% to 25% EtOAc-EtOH (9:1)+0.1% NH4OH) and recrystallized from cyclohexane/EtOAc to afford the title compound as a light yellow solid. UPLC-MS (Condition 1) tR=2.76 min, m/z=331.0 [M+H]+, m/z=329.0 [M−H]−; 1H-NMR (400 MHz, DMSO-d6) δ ppm 2.64 (s, 3H) 7.39 (d, J=9.05 Hz, 2H) 7.87 (d, J=9.05 Hz, 2H) 8.38 (d, J=1.71 Hz, 1H) 8.94 (d, J=1.96 Hz, 1H) 10.60 (s, 1H).

Provenance & Evidence