13-benzyl-9,10-dimethoxy-8,8-dimethyl-methyl-5,6,8,13-tetrahydro-[1 ,3]dioxolo[4,5-g]isoquino[3,2-a]isoquinolin-7-ylium bromide 在
甲醇 、 sodium tetrahydroborate 、
水 作用下,
以73%的产率得到13-benzyl-9,10-dimethoxy-8,8-dimethyl-5,8,13,13a-tetrahydro-6H-[1,3]dioxolo[4,5-g]isoquino[3,2-a]isoquinoline