m-chloroperoxybenzoic acid gave an isomeric mixture. The selective formation of the syn-isomers was attributed to dipole-dipole interactions between the peracid and imide moiety. Photooxidation of deoxynorcanthamide gave syn- and anti- hydroperoxide analogues through ene addition of singlet oxygen; the anti-hydroperoxide was the major product in this case, as a result of the steric effect of the imide
通过三种方法制备了新的降
冰片乙酰胺类似物:环氧化,光氧化和
溴化。与deoxynorcantharimide的环氧化米
氯过氧酸得到的异构体混合物。顺式异构体的选择性形成归因于过酸和
酰亚胺部分之间的偶极-偶极相互作用。脱氧降
冰片酰胺的光氧化通过单线态氧的烯加成得到顺式和反式
过氧化氢类似物。所述抗氢过氧化物是在这种情况下主要产物,为的
酰亚胺环的空间位阻效应的结果。脱氧降
冰片嘧啶的
溴化和随后的转化得到
吡咯烷和邻苯二甲
酰亚胺核心结构。 烯反应-环氧化-光氧化-卤化-立体选择性合成-杂环