(13a
R)-9,10-dimethoxy-7
t-methyl-(13a
r)-5,8,13,13a-tetrahydro-6
H-[1,3]dioxolo[4,5-
g]isoquino[3,2-
a]isoquinolinium; chloride 在
sodium hydride 、
二甲基亚砜 作用下,
以
四氢呋喃 为溶剂,
生成
(S)-4',5'-dimethoxy-6-methyl-7,8-dihydro-6H-spiro[[1,3]dioxolo[4,5-g]isoquinoline-5,2'-indan]