reaction was found to be highly enantio‐ and diastereoselective, yielding N‐tosylated aziridines. Low‐temperature nuclear magnetic resonance (NMR) spectra allowed for the determination of the N‐inversion barrier, that was found to be quite lower with respect to unsubstituted aziridines. A thorough conformational analysis supported by low‐temperature NMR data allowed for the determination of the absolute
给出了α-取代的α,β-不饱和酮的有机催化
叠氮化反应的第一个例子。发现该反应具有高度对映体和非对映体选择性,产生N-
甲苯磺酰化
氮丙啶。低温核磁共振(NMR)光谱可用于确定N转化阻挡层,相对于未取代的
氮丙啶,N转化阻挡层要低得多。借助低温NMR数据进行的全面构象分析,可以通过时域密度泛函理论对电子圆二色性光谱进行模拟,从而确定主要立体异构体的绝对构型。手征性:2015年27:875–887。©2015 Wiley Periodicals,Inc.