Cesium carbonate → Tert-butyl 3-((7-(4-((2-ethoxy-2-oxoethyl)(methyl)amino)phenyl)pyrido[4,3-b]pyrazin-5-ylamino)methyl)-4,4-difluoropiperidine-1-carboxylate

Participants

Reaction Steps

A solution of tert-butyl 3-((7-chloropyrido[4,3-b]pyrazin-5-ylamino)methyl)-4,4-difluoropiperidine-1-carboxylate (173 mg, 0.42 mmol), ethyl 2-(methyl(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)amino)acetate (200 mg, 0.63 mmol), Pd(PPh3)4 and Cs2CO3 in 4 mL of dioxane and 0.5 mL of water was stirred at 160° C. for 1 hour. The volatiles were removed in vacuo, and the residue was purified by chromatography with MeOH/H2O (1:8˜5:1) to give 373 mg of title compound.

Provenance & Evidence