1,3-二苯基-2-硫代巴比土酸 、
5-[(dimethylamino)methylene]dihydro-6-imino-1,3-dimethylpyrimidine-2,4(1H,3H)-dione monohydrochloride 以
N,N-二甲基甲酰胺 为溶剂,
反应 1.5h,
以53%的产率得到1,3-dimethyl-7,9-diphenylpyrido<2,3-d;6,5-d'>dipyrimidine-2,4,6(1H,3H,7H)-trione-8(9H)-thione