Two lathyrane diterpenoid stereoisomers containing an unusual trans-gem-dimethylcyclopropane from the seeds of Euphorbia lathyris.

Two lathyrane diterpenoid stereoisomers containing an unusual trans-gem-dimethylcyclopropane from the seeds of Euphorbia lathyris.
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两种黧豆二萜立体异构体,含有来自大戟种子的不寻常的反式宝石-二甲基环丙烷

DOI:
10.1039/d0ra10724g
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发表时间:
2021-01-11
期刊:
影响因子:
3.9
通讯作者:
Chen Y
Chen Y
中科院分区:
化学3区
文献类型:
--
作者:
Li L;Huang J;Lyu H;Guan F;Li P;Tian M;Xu S;Zhao X;Liu F;Paetz C;Feng X;Chen Y

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从续随子(Euphorbia lathyris)种子中分离得到两个新的二萜类化合物:Euphorbia factors L2 a(1)和L2 b(2)及其立体异构体Euphorbia factors L2(3)。大戟属因子L2 a和L2 b都具有前所未有的反式-偕-二甲基环丙烷作为结构特征。此外,大戟属因子L2 a是具有内环12(Z)-双键的lathyrane二萜类化合物的第一个实例。通过综合光谱分析、Cu-Kα辐射X射线衍射以及与计算的电子圆二色性(ECD)数据的比较,阐明了分子的结构及其绝对构型。大戟因子L2 b对U937细胞有抑制作用,IC_(50)为0.87 μM。
Two novel lathyrane-type diterpenoids, the Euphorbia factors L2a (1) and L2b (2), and their stereoisomer Euphorbia factor L2 (3) were obtained from seeds of Euphorbia lathyris. Both Euphorbia factors L2a and L2b possess an unprecedented trans-gem-dimethylcyclopropane as structural feature. Also, the Euphorbia factor L2a is the first example of a lathyrane diterpenoid with an endocyclic 12(Z)-double bond. The structures of the molecules and their absolute configurations were elucidated by comprehensive spectroscopic analyses, Cu-Kα radiation X-ray diffraction, and comparison with calculated electronic circular dichroism (ECD) data. The Euphorbia factor L2b exhibited an inhibitory effect against U937 cell line with an IC50 value of 0.87 μM.
DOI: 10.1002/mrc.1270100105
发表时间: 1977-01-01
期刊: ORGANIC MAGNETIC RESONANCE
影响因子: --
作者:
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