对苯二甲醛 、
对氯苯胺 、
6-<<(dimethylamino)methylene>amino>-1,3-dimethyluracil 以
甲苯 为溶剂,
以97%的产率得到6-(4-chlorophenyl)-5-(4-(6-(4-chlorophenyl)-1,2,3,4,5,6-hexahydro-1,3-dimethyl-2,4-dioxopyrimido[4,5-d]pyrimidin-5-yl)phenyl)-5,6-dihydro-1,3-dimethylpyrimido-[4,5-d]-pyrimidine-2,4(1H,3H)-dione