反应详情

温度

80 °C

A reaction mixture of 6-((6-bromo-[1,2,4]triazolo[4,3-a]pyridin-3-yl)difluoromethyl)pyridazin-3-amine (11.0 g, 32.2 mmol), methyl 3-bromo-2-oxopropanoate (11.67 g, 64.5 mmol), and NaHCO3 (10.84 g) in dioxane (150 mL) was heated at 80° C. for 4 hrs to provide a red reaction mixture. Solids were filtered off, rinsed with dioxane, and the combined filtrates were concentrated via rotary evaporation. The resulting residue was dissolved in EtOAc and washed with 0.1 N NaOH until the red color no longer persisted. The organic phase was then separated and concentrated to dryness. The resulting material was purified via MPLC (5:95, MeOH/EtOAc) to provide the title compound, 45I (4.0 g, 9.45 mmol, 30%). 1H NMR (400 MHz, DMSO-d6) δ ppm 3.88 (s, 3 H) 7.77 (dd, J=9.73, 1.64 Hz, 1 H) 7.85 (d, J=9.60 Hz, 1 H) 7.97-8.08 (m, 1 H) 8.53 (d, J=9.60 Hz, 1 H) 8.98 (d, J=1.01 Hz, 1 H) 9.02 (s, 1 H). ESI-MS:m/z 423.1 (M+H)+.

1. customto provide a red reaction mixture
2. filtrationSolids were filtered off
3. washrinsed with dioxane
4. concentrationthe combined filtrates were concentrated via rotary evaporation
5. dissolutionThe resulting residue was dissolved in EtOAc
6. washwashed with 0.1 N NaOH until the red color
7. customThe organic phase was then separated
8. concentrationconcentrated to dryness
9. customThe resulting material was purified via MPLC (5:95, MeOH/EtOAc)