The axial chirality of hexahydroxydiphenoyl (HHDP) groups contained in ellagitannins depends on the bridging position of d-glucose. The 4,6--HHDP group predominantly exhibits type chirality. This study elucidated the formation of the 4,6--()-HHDP group and subsequent axial isomerization by means of oxidative coupling of galloyl groups, which resulted in chirality.
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| http://dx.doi.org/10.1021/acs.orglett.2c03173 | DOI Listing |
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