The origin of the long range coupling in exocyclic epoxides with quasi-axial methylenes has been established by the synthesis of specifically deuterated analogues. Use was made of paramagnetic shift reagents in distinguishing between the epoxide protons.
在环外
环氧化物中与准轴向亚甲基的长距离偶联的起源已经通过合成特定的
氘代类似物来确定。在区分
环氧化物质子时使用顺磁性转移试剂。