反应详情

温度

50 °C

To a stirred mixture of 1-isopropyl-7-(2-methyl-6-(4-(tetrahydro-2H-pyran-2-yl)-4H-1,2,4-triazol-3-yl)pyridin-3-yl)-3,4-dihydropyrazino[2,3-b]pyrazin-2(1H)-one (0.400 g, 0.921 mmol) in ethanol (40 mL) at 50° C. was added hydrogen chloride (4 M in dioxane, 1.381 mL, 5.52 mmol). The resulting mixture was heated at 50° C. under nitrogen for 1 h. The suspension was concentrated under reduced pressure and the resulting solid was taken up in dimethylsulfoxide and purified using silica gel chromatography (0-10% ammonia saturated methanol in dichloromethane) to afford the title compound (0.200 g, 0.571 mmol, 62.0% yield) as a brown-red solid. 1H NMR (400 MHz, DMSO-d6) δ (ppm) 8.10 (br. s., 1H), 8.01 (br. s., 2H), 7.92 (s, 1H), 5.26 (quin, J=6.93 Hz, 1H), 4.14 (s, 2H), 3.58 (d, J=5.08 Hz, 3H), 1.47 (d, J=6.64 Hz, 6H); MS (ESI) m/z 351.5 [M+1]+.

1. concentrationThe suspension was concentrated under reduced pressure
2. custompurified