Sodium Carbonate → tert-butyl N-[2-(2-fluoro-4-pyridyl)-4-[[1-methyl-5-[(4S)-4-[(2,2,2-trifluoroacetyl)amino]azepan-1-yl]pyrazol-4-yl]carbamoyl]thiazol-5-yl]carbamate

Participants

Reaction Steps

In a microwave reaction vial, tert-butyl N-[2-bromo-4-[[1-methyl-5-[(4S)-4-[(2,2,2-trifluoroacetyl)amino]azepan-1-yl]pyrazol-4-yl]carbamoyl]thiazol-5-yl]carbamate (100 mg, 0.16 mmol), 2-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (110 mg, 0.49 mmol) and PD(DPPF)CL2 (12 mg, 0.016 mmol) were dissolved in acetonitrile (3 mL). 1.0M KOAc (0.25 mL, 0.25 mmol) and 1.0M Na2CO3 (0.25 mL, 0.25 mmol) were added and the reaction was irradiated with microwave at 120° C. for 30 min. The mixture was cooled, filtered through Celite, concentrated and purified via flash chromatography, EA/heptane 0% to 100% to afford tert-butyl N-[2-(2-fluoro-4-pyridyl)-4-[[1-methyl-5-[(4S)-4-[(2,2,2-trifluoroacetyl)amino]azepan-1-yl]pyrazol-4-yl]carbamoyl]thiazol-5-yl]carbamate (60 mg, 58%). This compound was stirred with 4N HCl in dioxane (3 mL, 12 mmol) and methanol (2 mL) at room temperature for 3 h. Solvent was removed under reduced pressure. The residue was dissolved in methanol (3 mL) and water (1 mL), potassium carbonate (67 mg, 0.48 mmol) was added and the mixture was heated at 60° C. for 1.5 h. After cooling to room temperature, the reaction mixture was diluted with water and extracted with EA 3×. The combined organic layers were dried over MgSO4 and the solvent removed under reduced pressure and the residue purified by preparative HPLC to afford 417. 1H NMR (400 MHz, DMSO) δ 9.04 (s, 1H), 8.29 (d, J=5.3 Hz, 1H), 7.74 (d, J=5.3 Hz, 3H), 7.59 (s, 1H), 7.42 (s, 1H), 3.66 (s, 3H), 3.24-3.01 (m, 5H), 1.94-1.73 (m, 3H), 1.67-1.48 (m, 3H). LCMS (ES+) m/z 431 (M+1)

Provenance & Evidence