Hydrochloric Acid → (4-(4-(2-chloropyrimidin-4-yl)-1H-pyrazol-1-yl)-1-(isoxazol-5-ylcarbonyl)piperidin-4-yl)acetonitrile

Participants

Reaction Steps

To a mixture of tert-butyl 4-(4-(2-chloropyrimidin-4-yl)-1H-pyrazol-1-yl)-4-(cyanomethyl)piperidine-1-carboxylate (0.259 g, 0.643 mmol) in 2 mL of dioxane was added 4 M HCl in dioxane (4.0 mL). The reaction was stirred at room temperature for 30 min, then evaporated to dryness. To the resulting crude HCl salt in methylene chloride (5.0 mL) was added triethylamine (0.269 mL, 1.93 mmol) followed by isoxazole-5-carbonyl chloride (0.0744 mL, 0.771 mmol). The mixture was stirred at room temperature for 30 min, washed with saturated sodium bicarbonate, dried, and evaporated to dryness. The residue was used directly in next step (233 mg, 91%). LCMS (M+H) 398.0.

Provenance & Evidence