Stereodynamic Quinone-Hydroquinone Molecules That Enantiomerize at sp(3)-Carbon via Redox-Interconversion.

Stereodynamic Quinone-Hydroquinone Molecules That Enantiomerize at sp(3)-Carbon via Redox-Interconversion.
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DOI:
10.1021/jacs.7b09176
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发表时间:
2017-10-25
影响因子:
15
通讯作者:
Miller SJ
Miller SJ
中科院分区:
化学1区
文献类型:
--
作者:
Kim B;Storch G;Banerjee G;Mercado BQ;Castillo-Lora J;Brudvig GW;Mayer JM;Miller SJ

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自分子手性发现以来,非重叠镜像有机分子已被发现在生物,化学过程中是必不可少的,并且越来越多地在材料科学中。通常,含有四个不同取代基的碳中心在构型上是稳定的,除非与立体碳原子的键断裂并重新形成。在此,我们描述了sp3-立体异构的含碳分子,动态异构化,对映异构体之间的相互转化,而不裂解的组成键,也不通过远程官能团迁移。立体动力学分子被设计成含有一对氧化还原活性取代基,醌和氢醌基团,其允许通过氧化还原互变发生对映异构化。在对映体纯主体的存在下,这些分子经历去外消旋化过程,其允许观察对映体富集的化合物。这项工作揭示了一个根本不同的对映异构化途径,手性化合物,耦合氧化还原相互转化手性。
Since the discovery of molecular chirality, non-superimposable mirror-image organic molecules have been found to be essential across biological, chemical processes, and increasingly in materials science. Generally, carbon centers containing four different substituents are configurationally stable, unless bonds to the stereogenic carbon atom are broken and reformed. Herein, we describe sp3-stereogenic carbon-bearing molecules that dynamically isomerize, interconverting between enantiomers without cleavage of a constituent bond, nor through remote functional group migration. The stereodynamic molecules were designed to contain a pair of redox-active substituents, quinone and hydroquinone groups, which allow the enantiomerization to occur via redox-interconversion. In the presence of an enantiopure host, these molecules undergo a deracemization process that allows observation of enantiomerically enriched compounds. This work reveals a fundamentally distinct enantiomerization pathway available to chiral compounds, coupling redox-interconversion to chirality.
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