Structure determination of baeckeins C and D from the roots of Baeckea frutescens
Structure determination of baeckeins C and D from the roots of Baeckea frutescens
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DOI：
10.1002/mrc.2803
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发表时间：
2011-11
影响因子：
2
通讯作者：
Bei-xi Jia;Yu-xin Zhou;Xiaoqing Chen;Xiao-Bing Wang;Jie Yang;M. Lai;Qiang Wang
中科院分区：
文献类型：
--
作者：
Bei-xi Jia;Yu-xin Zhou;Xiaoqing Chen;Xiao-Bing Wang;Jie Yang;M. Lai;Qiang Wang
Baeckeins C（化合物 1）和 D（化合物 2）是一对新的非对映异构双黄酮类化合物，是从 Baeckea frutescens 的根中分离出来的。它们的结构在光谱分析的基础上得到了阐明，包括 HR-ESI-MS 以及一维和二维 NMR 谱（1H 和 13C NMR、HSQC、HMBC 和 ROESY）。化合物 1 和 2 的 2,3-环氧化物部分的绝对构型通过圆二色光谱法结合量子化学计算确定。版权所有 © 2011 约翰·威利父子有限公司
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 (1H and 13C 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.