Photolysis of dihydroisoquinoline (2) in the presence of nitrosobenzene gives the epoxyimine (10), sodium borohydride reduction of which affords the aniline (14). Reaction of the dehydro compound (17) derived from 14 with performic acid followed by hydrolysis provides the diol (20). Hydrogenolysis of 20 over a palladium catalyst affords the corynoline analog (7). All compounds are formed under strictly stereoselective control.
在
亚硝基苯存在下,二氢
异喹啉(2)的光解反应生成环氧
亚胺(10),其后通过氢化
钠还原得到
苯胺(14)。由
苯胺(14)衍生出的脱氢化合物(17)与
过甲酸反应后
水解,得到二醇(20)。在
钯催化剂上对20进行氢解反应生成可可苷类似物(7)。所有化合物的形成都在严格的立体选择性控制下进行。