Water → tert-butyl 1-(3-methyl-6-(5-(pyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazolo[3,4-c]pyridin-3-yl)pyridin-2-yl)piperidin-4-ylcarbamate

Participants

Reaction Conditions

Reaction Steps

In a microwave reaction vial was charged with tert-butyl 1-(3-chloro-6-(5-(pyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazolo[3,4-c]pyridin-3-yl)pyridin-2-yl)piperidin-4-ylcarbamate from Example 241 (72.1 mg, 0.113 mmol), Methyl boronic acid (34.0 mg, 0.567 mmol), 1,1′-Bis(diphenylphosphino)ferrocenepalladium (II) chloride (9.25 mg, 0.0113 mmol), 1.00 M of Potassium acetate in Water (0.17 mL, 0.17 mmol), 1.00 M of Sodium carbonate in Water (0.17 mL, 0.17 mmol), and Acetonitrile (3 mL). The reaction mixture was heated under microwave at 150° C. for 3 minutes. Another 5 equivalents of Methyl boronic acid was added and continue heated under microwave at 150° C. for 3 minutes. The same procedure was repeated 2 more times. The mixture was concentrated to afford crude tert-butyl 1-(3-methyl-6-(5-(pyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazolo[3,4-c]pyridin-3-yl)pyridin-2-yl)piperidin-4-ylcarbamate, which was dissolved in 1,4-Dioxane (5 mL) and treated with 4.0 M of Hydrogen chloride in 1,4-Dioxane (5 mL) overnight at room temperature. The mixture was then concentrated, and the residue was purified by reverse phase HPLC to afford 243 as an off-white solid (14.0 mg, 32%). 1H NMR (400 MHz, DMSO) δ 9.24 (d, J=17.9 Hz, 2H), 9.07 (s, 1H), 8.61 (s, 1H), 8.43 (d, J=7.8 Hz, 1H), 8.38 (s, 1H), 7.76 (d, J=7.6 Hz, 1H), 7.65 (d, J=7.6 Hz, 1H), 7.56 (d, J=4.6 Hz, 1H), 3.73 (d, J=11.9 Hz, 2H), 3.13 (s, 1H), 3.01 (d, J=11.6 Hz, 2H), 2.32 (s, 3H), 2.02 (d, J=12.0 Hz, 2H), 1.68 (d, J=11.1 Hz, 2H). ESI MS m/z=386.2 (M+1)

Provenance & Evidence