ethyl ({5-bromo-3-[(2-chloro-3,6-difluorobenzyl)amino]pyrazin-2-yl}amino)(oxo)acetate 以
二乙二醇二甲醚 为溶剂,
反应 16.0h,
以furnishing 7-bromo-1-(2-chloro-3,6-difluorobenzyl)-1,4-dihydropyrazino[2,3-b]pyrazine-2,3-dione in 43% yield (0.46 g)的产率得到7-bromo-1-(2-chloro-3,6-difluorobenzyl)-1,4-dihydropyrazino[2,3-b]pyrazine-2,3-dione