Pyridine → 4-chloro-3-[1-(4-ethylphenyl)-1H-imidazol-5-yl]-1-methyl-1H-pyrazolo[3,4-d]pyrimidine

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A solution of (4,6-dichloropyrimidin-5-yl)[1-(4-ethylphenyl)-1H-imidazol-5-yl]methanone (C21) (136 mg, 0.392 mmol) in acetonitrile (3 mL) was added to a solution of methylhydrazine (18.1 mg, 0.393 mmol) in acetonitrile (3 mL). After addition of pyridine (41 mg, 0.52 mmol), the reaction mixture was stirred at room temperature for 1 hour and then concentrated in vacuo. Purification via silica gel chromatography (Gradient: 0% to 20% ethyl acetate in heptane) afforded the product, along with recovered starting material (35 mg, 0.10 mmol). Yield: 81 mg, 0.24 mmol, 61% (82% based on recovered starting material). LCMS m/z 339.0 (M+1). 1H NMR (500 MHz, CDCl3) δ 1.21 (t, J=7.6 Hz, 3H), 2.62 (q, J=7.6 Hz, 2H), 4.11 (s, 3H), 7.11-7.15 (m, 4H), 7.52 (d, J=0.8 Hz, 1H), 7.85 (d, J=1.0 Hz, 1H), 8.73 (s, 1H).

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