对苯二甲醛 、
甲氧苯胺 、
6-<<(dimethylamino)methylene>amino>-1,3-dimethyluracil 以
甲苯 为溶剂,
以73%的产率得到5,6-dihydro-5-(4-(1,2,3,4,5,6-hexahydro-6-(4-methoxyphenyl)-1,3-dimethyl-2,4-dioxo-pyrimido[4,5-d]pyrimidin-5-yl)phenyl)-6-(4-methoxyphenyl)-1,3-dimethyl-pyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione