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Feiting Zhang, Yuxin Li, Tianhui Zhu, Wenhe Zhang, Bin Qin*, Song You*
Feiting Zhang, Yuxin Li, Tianhui Zhu, Wenhe Zhang, Bin Qin*, Song You*
摘要: The stereostructures of curdione and its other three isomers with two stereogenic centers, C-4 and C-7, were studied each by electronic circular dichroism (ECD) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy for determination of their absolute configurations. Their expected spectra based upon the density functional theory calculations were reasonably well agreed on experimental spectra. Furthermore, it was reported for the first time that these compounds, which have the unsaturated ketone groups with the distance between the two unsaturated carbon atoms less than about 2.55Å, can be applied to the unsaturated ketone helicity rule.