Acetonitrile → 3-(1-ethyl-1H-imidazo[4,5-c]pyridin-2-yl)-5-phenylpyrazin-2-amine

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Reaction Steps

5-Bromo-3-(1-ethyl-1H-imidazo[4,5-c]pyridin-2-yl)pyrazin-2-amine (0.038 g, 0.12 mmol) (see Example 2), phenyl boronic acid (0.034 g, 0.27 mmol), dichlorobis(triphenylphosphine)palladium(II) (0.009 g, 0.012 mmol), potassium carbonate (0.045 g, 0.32 mmol), and an 8:1 mixture of acetonitrile:water (3 mL) were combined and subjected to 150° C. for 5 minutes in a SmithSynthesizer microwave. The resulting heterogeneous, black mixture was filtered through a celite pad, which was then washed with ethyl acetate and water. The mixture is extracted into ethyl acetate (×3) and washed with water and saturated sodium chloride. The combined organic layers are dried over magnesium sulfate, filtered and concentrated. The residue is purified on silica, eluting with 2.5% methanol in chloroform to afford the title compound (0.009 g, 23%).

Provenance & Evidence