5-Bromo-3-(5-(4-isopropylpiperazin-1-yl)pyridin-2-ylamino)-1-methylpyridin-2(1H)-one 、 5-Bromo-1-methyl-3-(1,2,3,4-tetrahydroisoquinolin-6-ylamino)pyrazin-2(1H)-one 以248a was obtained as yellow solid (292 mg, 70%)的产率得到5-Bromo-3-(2-ethyl-1,2,3,4-tetrahydroisoquinolin-6-ylamino)-1-methylpyrazin-2(1H)-one