反应详情

温度

90 °C

4-benzyl-7-(hydroxymethyl)-3,4-dihydropyrido[2,3-b]pyrazin-2(1H)-one (100 mg, 0.37 mmol) was suspended in propionitrile (1 mL) and (cyanomethyl)trimethylphosphonium iodide (123.0 mg, 0.51 mmol) was added followed by N-ethyl-N-isopropylpropan-2-amine (180 ul, 1.03 mmol). To the stirred mixture was then added 4-(4-chlorophenyl)piperidine hydrochloride (104.5 mg, 0.45 mmol). The reaction was heated to 90° C. with stirring for 2 h. The reaction was then cooled to room temperature and purified via HPLC (55-90% acetonitrile in water, ammonium bicarbonate buffer). The fractions were combined and concentrated until a white solid precipitated. The precipitate was filtered and dried in vacuum to afford the title compound (69.9 mg, 42%) as a white solid. 1H NMR (DMSO-d6) δ (ppm): 10.56 (s, 1H), 7.63 (d, J=2.0 Hz, 1H), 7.30-7.37 (m, 6H), 7.23-7.30 (m, 3H), 7.00 (d, J=2.0 Hz, 1H), 4.71 (s, 2H), 3.85 (s, 2H), 3.33 (s, 3H), 2.89 (d, J=11.4 Hz, 2H), 1.99 (t, J=10.6 Hz, 2H), 1.67-1.78 (m, 2H), 1.48-1.66 (m, 2H). [M+H] calc'd for C11H15Cl2N, 447; found, 447.

1. temperatureThe reaction was then cooled to room temperature
2. custompurified via HPLC (55-90% acetonitrile in water, ammonium bicarbonate buffer)
3. concentrationconcentrated until a white solid
4. customprecipitated
5. filtrationThe precipitate was filtered
6. customdried in vacuum