Hydrochloric Acid → 5-(5-(6-acetamidopyridin-2-yl)-2-chlorobenzamido)-1-phenyl-1H-pyrazole-3-carboxamide

Participants

Reaction Steps

To a solution of 5-(6-acetamidopyridin-2-yl)-2-chloro-N-(3-cyano-1-phenyl-1H-pyrazol-5-yl)benzamide (Example 88, 100 mg, 0.22 mmol) in dimethylsulfoxide (3 mL) was added potassium carbonate (60 mg, 0.44 mmol) followed by hydrogen peroxide (30% w/w solution in water, 441 μL, 4.4 mmol) and the reaction was stirred at room temperature for 2.5 hours. Additional hydrogen peroxide was added (882 μL, 8.8 mmol) and the reaction was stirred for 1 hour. The reaction was diluted with water (5 mL) then neutralised with 2M aqueous hydrochloric acid and extracted into ethyl acetate (3×10 mL). The combined organic extracts were dried over magnesium sulphate and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with 80% ethyl acetate in heptanes to furnish the title compound as a colourless solid (65 mg, 62%).

Provenance & Evidence