Oxidation of the 2-substituted N-amainobenzimidazole (5) in the presence of prochiral alkenes gives aziridines stereoselectively: addition, to γ,γ-dimethyl-α-methylenebutyrolactone is stereospecific and the relative configuration of the two chiral centres in the product has been confirmed by a single crystal X-ray diffraction study and is in agreement with a transition state geometry resembling (11)
在前手性
烯烃存在下
氧化2-取代的N-
氨基
苯并咪唑(5)可以立体选择性地形成
氮丙啶:此外,γ,γ-二
甲基-α-亚
甲基丁内
酯具有立体特异性,并且产物中两个手性中心的相对结构由单晶X射线衍射研究证实,并且与类似(11)的过渡态几何结构相符。