Structurally diverse 1,2-diarylpropanes from the fruit of Crataegus pinnatifida and the investigation on their mirror-image ECD spectra with the same absolute configurations
作者:Tian-Ming Lv、Rui Guo、Bo-Han Yang、Peng Zhao、Bin Lin、Xiao-Xiao Huang、Shao-Jiang Song
DOI:10.1016/j.phytochem.2024.114067
日期:2024.6
were determined through multiple NMR spectral analyses, empirical NMR rules, X-ray crystallography, and the comparison of experimental ECD spectra with calculated data. In addition, the analysis of ECD spectra revealed that substituent effects could generate an inverted chiroptical response, exhibiting in mirror-image ECD signals. This phenomenon was investigated by conformationalanalysis, molecular orbital