N'-(5-cyano-1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)-N,N-dimethylimidoformamide 、
甲胺 在
ligroin 、 5-methylamino-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione 作用下,
以
甲醇 为溶剂,
反应 16.0h,
以to give 0.38 g of 5-methylamino-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione (compound 16) in a 85% yield的产率得到5-methylamino-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione