1,3-二甲基巴比妥酸 、
戊二烯醛缩二苯胺盐酸盐 在
triethylamine 3-(2-(4-(1,3-diethyl-4,6-dioxo-2-thioxotetrahydropyrimidin-5(2H)-ylidene)but-2-en-1-ylidene)-3,3-dimethylindolin-1-yl)propane-1-sulfonate 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 2.0h,
以80%的产率得到5-<5-(hexahydro-1,3-dimethyl-2,4,6-trioxo-5-pyrimidinyl)-2,4-pentadienylidene>-1,3-dimethyl-2,4,6(1H,3H,5H)-pyrimidinetrione