1-methyl-3-(2-methyl-5-nitrophenyl)-7-(methylthio)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one 在
palladium 10% on activated carbon 、
氢气 作用下,
以
甲醇 为溶剂,
反应 6.0h,
以94%的产率得到3-(5-amino-2-methylphenyl)-1-methyl-7-(methylthio)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one