Potassium Carbonate → tert-butyl ((1S,2S)-2-((5-(trifluoromethyl)-3-vinylpyrazin-2-yl)amino)cyclopentyl)carbamate

Participants

Reaction Steps

A suspension of tert-butyl N-[(1S,2S)-2-{[3-bromo-5-(trifluoromethyl)pyrazin-2-yl]amino}cyclopentyl]carbamate (650 mg, 1.53 mmol), 2-ethenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS number 75927-49-0; 942 mg, 6.11 mmol), tetrakis(triphenylphosphine)palladium (177 mg, 0.15 mmol) and potassium carbonate (845 mg, 6.11 mmol) in 1,4-dioxane (5 ml) and water (0.8 ml) was subjected to microwave irradiation at 120° C. for 1 hour. The reaction was partitioned between ethyl acetate (10 ml) and water (10 ml). The aqueous layer was further extracted with ethyl acetate (3×20 ml). The combined organics were washed with brine (20 ml), filtered through a hydrophobic frit and concentrated in vacuo. The resulting residue was purified by column chromatography (silica, 0-50% ethyl acetate/petrol) to afford the title compound.

Provenance & Evidence