Synthesis of Two Coumarins Isolated from Aster praealtus

Synthesis of Two Coumarins Isolated from Aster praealtus
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从紫菀中分离的两种香豆素的合成

DOI:
10.1002/cjoc.201500295
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发表时间:
2015-07
影响因子:
5.4
通讯作者:
Liu, Bo
Liu, Bo
中科院分区:
化学2区
文献类型:
--
作者:
Wang, Bo;Chen, Huijun;Wu, Yikang;Liu, Bo

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从紫菀(Aster praealtus)中分离得到两种香豆素类化合物,通过环己基甲醇与香豆素衍生的芳基溴或芳基碘的直接偶联反应合成。由于环己基甲醇周围的空间拥挤和芳基卤的低反应活性,使得许多看似可行的合成方法都难以实现醚化。因此,这些化合物的明确的1H和13C NMR数据是第一次。在1H和13 C NMR数据在以前的报告中的不确定性和错误也被消除和显示,分别。
Two coumarins isolated from Aster praealtus were synthesized via a direct coupling of the corresponding cyclohexyl carbinol with a coumarin-derived aryl bromide or iodide, a very difficult etherification due to the excess steric congestion around the carbinol and the low reactivity of the aryl halide that frustrated many seemingly feasible protocols. Unequivocal 1H and 13C NMR data for these compounds were thus made available for the first time. Uncertainty and errors in 1H and 13C NMR data in previous reports are also eliminated and revealed, respectively.
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发表时间: 2008-05-05
期刊: TETRAHEDRON
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