Abstract
The axial chirality of biaryl natural products with restricted rotation along the biaryl axis or the preferred helicity of biaryls with low rotational energy barrier is a stereochemical feature, which can affect the bioactivity of xanthone biaryl natural products profoundly. The applicability of electronic circular dichroism (ECD) method supported with TDDFT-ECD calculation was demonstrated on the stereochemical study of biaryl xanthone natural products such as the axially chiral neosartorin (1) [1] and dicerandrol B (2) [2] having free rotation along the biaryl axis.
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