Based on 1H‐NMR analyses, we have also discovered that the original configuration of the acetylated intermediate, obtained by either hydride, Grignard, or cuprate conjugate additions to α‐substituted N‐enoyl bornane‐10,2‐sultams was initially erroneously attributed by Oppolzer et al. A new, much simpler rationalization for these 1,4‐additions has now been proposed.
使用19 F-NMR的分析方法中,我们已经纠正的和改进的最初发现将EtMgBr期间观察到的非对映选择性之间的线性相关性缀合除了迈克尔型受体的1,作为它们的函数的σ对位 哈米特电子参数。基于1 H-NMR分析,我们还发现最初被错误地归因于将
氢化物,格利雅(Grignard)或
铜酸盐共轭物添加到α-取代的N-
烯基
烯丙基
冰片烷10,2-杜鹃花中而获得的乙酰化
中间体的原始构型由Oppolzer等人撰写。现在已经提出了一种针对这些1,4加成的新的,更简单的合理化方法。