Hydrochloric Acid → HCID 131727489, compound

Participants

Reaction Steps

4-(1H-Pyrrolo[2,3-b]pyridin-4-yloxy)-3-fluorobenzenamine (40 mg, 164 μmol, Compound C of Example 1) and 2-chloro-N-(2,4-difluorophenyl)-6-methylnicotinamide (51 mg, 181 μmol) were suspended in 1,4-dioxane (1 mL). 4M HCl in 1,4-dioxane (0.16 mL, 0.333 mmol) was added and the reaction was irradiated (CEM personal microwave, 300 W) to a temperature of 160° C. for 60 min. The reaction was cooled to ambient temperature and NMP (1 mL) was added. The reaction mixture was re-heated to 160° C. (microwave irradiation, 300 W) for an additional two hours. The 1,4-dioxane was removed by rotary evaporation and the residue was partitioned between 10% aq. NaHCO3 solution (10 mL) and EtOAc (10 mL). The organic layer was separated and the aqueous layer was extracted EtOAc (2×10 mL). The combined organic layers were washed with 10% LiCl (20 mL), dried (Na2SO4) and concentrated in vacuo. The crude product was purified by preparative (RP) HPLC Chromatography (YMC S5 ODS, 20×100 mm, 10 minute gradient from 33% to 90% aqueous methanol with 0.1% TFA). The fractions containing the desired product were combined and concentrated. The purified material was dissolved in MeOH (1 mL), acidified with 4 N HCl in 1,4-dioxane (0.10 mL) and concentrated. The resulting salt was triturated with hot EtOAc and collected by filtration to afford a brown solid (4.4 mg, >97% HPLC purity). 1H NMR (DMSO-d6) δ 3.15 (s, 3H), 6.48 (s, 1H), 6.69 (d, 1H, J=6.10 Hz), 6.91 (d, 1H, J=7.63 Hz), 7.06-7.21 (m, 1H), 7.31-7.44 (m, 2H), 7.46-7.64 (m, 3H), 8.12-8.42 (m, 3H), 10.41 (s, 1H), 10.96 (s, 1H), 12.58 (s, 1H); MS(ESI+) m/z 490.2 (M+H)+.

Provenance & Evidence