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Structure determination of baeckeins C and D from the roots of Baeckea frutescens

✍ Scribed by Bei-Xi Jia; Yu-Xin Zhou; Xiao-Qing Chen; Xiao-Bing Wang; Jie Yang; Mao-Xiang Lai; Qiang Wang

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
281 KB
Volume
49
Category
Article
ISSN
0749-1581

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✦ Synopsis

Baeckeins C (compound 1) and D (compound 2), a pair of new diastereomeric biflavonoids, were isolated from the roots of Baeckea frutescens. Their structures were elucidated on the basis of spectroscopic analysis, including HR‐ESI‐MS and one‐ and two‐dimensional NMR spectra (^1^H and ^13^C NMR, HSQC, HMBC, and ROESY). The absolute configurations of the 2,3‐epoxide moiety for compounds 1 and 2 were determined by circular dichroism spectrometry combined with quantum chemical calculations. Copyright © 2011 John Wiley & Sons, Ltd.

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