Structure Revision of Decurrensides A-E Enabled by the RFF Parametric Calculations of Proton Spin-Spin Coupling Constants.

Structure Revision of Decurrensides A-E Enabled by the RFF Parametric Calculations of Proton Spin-Spin Coupling Constants.
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通过质子自旋-自旋耦合常数的 RFF 参数计算实现了 Decurrenside A-E 的结构修订。

DOI:
10.1021/acs.joc.6b01855
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发表时间:
2016
期刊:
The Journal of organic chemistry
影响因子:
--
通讯作者:
A. Kutateladze
A. Kutateladze
中科院分区:
--
文献类型:
--
作者:
A. Kutateladze

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描述了最近表征的天然产物--十字内酯A-E的结构修正。快速而准确地计算质子自旋-自旋耦合常数有助于修正。虽然~(13)C化学位移计算可以揭示原结构的错误分配,但计算的自旋耦合常数具有更高的结构信息含量,为结构重新分配过程提供信息和指导。总而言之,~(13)C化学位移和自旋耦合常数的计算构成了一个强大的、现在实用的结构发现工具。
Structure revision of the recently characterized natural products, decurrensides A-E, is described. The revision is aided by fast and accurate computations of proton spin-spin coupling constants. While the (13)C chemical shifts calculations could reveal the misassignment of the original structures, the calculated spin coupling constants possess much higher structural information content, informing and guiding the process of structure reassignment. Together, calculations of (13)C chemical shifts and spin coupling constants constitute a robust and now practical structure discovery tool.