Methyl cyanoacetate → 1-[1-(Cyanoacetyl)-4-(cyanomethyl)piperidin-4-yl]-3-(phenylamino)-1H-pyrazole-4-carboxamide

Participants

Reaction Steps

To a suspension of 4-[4-carbamoyl-3-(phenylamino)-1H-pyrazol-1-yl]-4-(cyanomethyl) piperidinium trifluoroacetate (60 mg, 0.14 mmol) in Me-THF (2.0 mL) was added DBU (0.065 mL, 0.43 mmol), followed by methyl cyanoacetate (28 mg, 0.29 mmol). The resulting mixture was allowed to stir for 1 hour before saturated aqueous NaHCO3 solution was added and the resulting mixture was extracted with EtOAc (3×). The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated in vacuo. The residue was purified by MPLC on silica gel (using a gradient elution of 50-100%, EtOAc/hexanes followed by elution with 10% MeOH/EtOAc) to afford the title compound, Example #36-1.

Provenance & Evidence