Synthesis and Comprehensive Structural and Chiroptical Characterization of Enones Derived from (−)-α-Santonin by Experiment and Theory
作者:Marek Masnyk、Aleksandra Butkiewicz、Marcin Górecki、Roman Luboradzki、Christoph Bannwarth、Stefan Grimme、Jadwiga Frelek
DOI:10.1021/acs.joc.6b00416
日期:2016.6.3
experimental studies were supplemented by detailed DFT calculations. A notable result of the study is assessing the applicability of the enone sector and helicity rules in dichroic studies and potential restrictions. To this end, a number of factors that could determine the signs of the individual Cotton effects has been considered. Among these nonminimum structure effects, i.e., twisting of the enone chromophore
本工作的目的是解释观察到的偏离扇形和螺旋度规则的原因,以便通过电子圆二色性(ECD)确定旋光性α,β-不饱和酮的绝对构型。为此,一系列具有骨架表示两者共同的十氢化萘模型化合物的cisoid和transoid烯酮合成。在这项工作的框架内,在可能的情况下,进行了由单晶X射线分析支持的详细二向色性研究。为了帮助实现所需的目标,所选顺式的构象灵活性通过溶剂和温度对ECD光谱的依赖性检测了烯酮。所有实验研究都通过详细的DFT计算得到补充。该研究的显着结果是评估二色性研究中烯酮领域的适用性和螺旋度规则以及潜在的限制条件。为此,已经考虑了许多因素,这些因素可以确定单个棉花效应的迹象。在这些非最小的结构效应中,可以提及烯酮生色团的扭曲和烯酮双键的非平面性。