反应详情

To a solution of 0.14 g of tert-butyl (2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)(1-(2-(6-methoxy-3-oxopyrido(2,3-b)pyrazin-4(3H)-yl)ethyl)piperidin-4-yl)carbamate in 3.0 mL of ethanol, 3 mL of a 6.0 mol/L hydrogen chloride/ethanol solution was added at room temperature. The mixture was stirred at the same temperature for 3 hours, and the solvent was distilled off under reduced pressure. Diethyl ether was added to the resultant residue, and the solid was filtered off to obtain 0.11 g of 4-(2-(4-((2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)amino)piperidin-1-yl)ethyl)-6-methoxypyrido(2,3-b)pyrazin-3(4H)-one hydrochloride as a light brown solid.

1. distillationthe solvent was distilled off under reduced pressure
2. additionDiethyl ether was added to the resultant residue
3. filtrationthe solid was filtered off