Potassium Carbonate → 4-(1-Methyl-1H-pyrazol-4-ylmethyl)-3'-(3-trifluoromethylphenyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazine

Participants

Reaction Conditions

Reaction Steps

Charge a carousel tube with 3-trifluoromethylbenzeneboronic acid (136 mg, 0.66 mmol), 3′-chloro-4-(1-methyl-1H-pyrazol-4-ylmethyl)-3,4,5,6-tetrahydro-2H-[1,2′]bipyrazinyl (160 mg, 0.55 mmol) and N,N-dimethylacetamide (1 mL). Add N,N-dimethylacetamide (3 mL) and potassium carbonate (185 mg, 1.32 mmol) and purge with nitrogen for about 45 min. Add water (2 mL, purged with nitrogen for 1 hr.) then tetrakis(triphenylphosphine)palladium(0) (0.003 g, 0.0025 mmol) and purge the reaction vessel for about 30 min. Heat at 110° C. overnight. Cool to room temperature, add water and extract with DCM (3×30 mL), and then concentrate the combined DCM extracts. Purify using silica gel chromatography, followed by reverse phase HPLC, to give the title compound (128 mg, 58%). MS (ES): m/z=403.1 [M+H]+.

Provenance & Evidence