Epimerization of <i>trans</i>‐Cycloalkenes with the X−C=C−SeR*‐Unit – The Steric Demand of X=H, F, Cl, Br, I, Me, Et and CF<sub>3</sub>
作者:Helmut Poleschner、Matthias Heydenreich、Andreas J. Achazi
DOI:10.1002/ejoc.202300838
日期:2023.11.14
The ring inversion of trans-cycloalkenes, ring sizes 9–20, investigated with temperature variable 13C NMR spectroscopy, is a highly sensitive method to characterize the steric demand of substituents: H≪F≪Cl
环尺寸为9-20 的反式环烯烃的环反转,通过温度可变13 C NMR 光谱进行研究,是一种表征取代基空间需求的高度灵敏的方法:H≪F≪Cl