1,3-二甲基巴比妥酸 、
4-methoxy-6,6-dimethyl-5,6,7,8-tetrahydro-[1,3]dioxolo[4,5-g]isoquinolin-6-ium-5-olate 在
三乙胺 作用下,
以
N,N-二甲基乙酰胺 为溶剂,
以27%的产率得到4'-methoxy-1,3-dimethyl-7'-(1,3-dimethyl-2,4,6-trioxoperhydropyrimidin-5-yl)-2,4,6-trioxospiro[perhydropyrimidine-5,6'-(5',6',7',8'-tetrahydro[1,3]dioxolo[4,5-g]naphthalene)]