Light‐Promoted Organocatalysis with N‐Heterocyclic Carbenes,ChemPhotoChem

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Light‐Promoted Organocatalysis with N‐Heterocyclic Carbenes
ChemPhotoChem ( IF 3.0 ) Pub Date : 2020-07-01 , DOI: 10.1002/cptc.202000120
Andreas Mavroskoufis ₁ , Michael Jakob ₁ , Matthew N. Hopkinson ₁

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The combination of N‐heterocyclic carbene (NHC)‐organocatalysis with photochemical activation can lead to unprecedented reaction pathways not observed without light. A selection of dual catalytic systems merging NHCs with photoredox catalysis, for example, have leveraged the ability of NHCs to stabilize intermediate radical species and facilitate single electron transfer events. Furthermore, NHCs can transiently modulate the photochemical properties of a substrate and enable direct absorption of otherwise photoinactive organic compounds. In this Concept article, the recent advances in this rapidly developing field are summarized. For each transformation, a particular focus is placed on the mechanistic aspects of the process while key features that highlight the synthetic potential of the light mediated NHC organocatalysis are presented.

中文翻译：

N杂环卡宾在光促进下的有机催化

N-杂环卡宾（NHC）-有机催化与光化学活化的结合可以导致没有光就无法观察到的前所未有的反应途径。例如，将NHC与光氧化还原催化相结合的双重催化体系的选择已经利用了NHC稳定中间自由基物种和促进单电子转移事件的能力。此外，NHC可以瞬时调节底物的光化学性质，并能够直接吸收否则具有光惰性的有机化合物。在这篇概念文章中，总结了这个快速发展领域中的最新进展。对于每个转化，都将重点放在过程的机械方面，同时提出突出强调光介导的NHC有机催化合成潜力的关键特征。

更新日期：2020-07-01

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