Hydrochloric Acid → 2-(4-(2-Aminopyridin-4-yloxy)-3-fluorophenylamino)-n-(2,4-difluorophenyl)nicotinamide, hydrochloride salt

Participants

Reaction Conditions

Reaction Steps

Bis(trifluoroacetoxy)iodobenzene (0.10 g, 0.23 mmol) was added to a solution of 2-(4-(2-carbamoylpyridin-4-yloxy)-3-fluorophenylamino)-N-(2,4-difluorophenyl)nicotinamide (0.080 g, 0.17 mmol), water (0.006 g, 0.33 mmol) and pyridine (0.27 mL, 3.33 mmol) in anhydrous DMF (5 mL) at room temperature. The reaction mixture was stirred for 69 hours before 6N aq HCl (2 mL) was added and the reaction stirred for an additional fifteen minutes. The mixture was extracted twice with Et2O and the combined organic layers discarded. The aqueous layer was neutralized with 1M NaHCO3(aq) then extracted with EtOAc. The combined organic layers were dried over anhydrous MgSO4 and concentrated in vacuo. The resultant residue was purified by preparative HPLC (YMC S10 ODS, 30×500 mm, 30 minute gradient from 34% to 90% aqueous methanol with 0.1% TFA). The appropriate fractions were combined and lyophilized to an off-white solid that was dissolved in anhydrous THF (2 mL), cooled to 0° C. and treated with HCl (4N in dioxane, 1.0 mL, 4.0 mmol). The reaction mixture was stirred for ten minutes, before being lyophilized to afford the title compound (0.029 g, 35%) as an off-white solid. 1H NMR (DMSO-d6) δ 10.72 (s, 1H), 10.49 (s, 1H), 8.32-8.40 (m, 2H), 8.13 (dd, 1H, J=13.7, 2.4 Hz), 7.82-7.92 (m, 3H), 7.29-7.53 (m, 4H), 7.05-7.15 (m, 1H), 6.97-7.01 (m, 1H), 6.64-6.66 (m, 1H), 6.12 (d, 1H, J=2.4 Hz); HRMS(ESI+), 452.1334 (M+H)+ calc, 452.1341 (M+H)+ found.

Provenance & Evidence