对苯二甲醛 、
4-硝基苯胺 、
6-<<(dimethylamino)methylene>amino>-1,3-dimethyluracil 以
甲苯 为溶剂,
以83%的产率得到5,6-dihydro-5-(4-(1,2,3,4,5,6-hexahydro-1,3-dimethyl-6-(4-nitrophenyl)-2,4-dioxo-pyrimido[4,5-d]pyrimidin-5-yl)phenyl)-1,3-dimethyl-6-(4-nitrophenyl)pyrimido[4,5-d]-pyrimidine-2,4(1H,3H)-dione