Non-Classical Anionic Naked N-Heterocyclic Carbenes: Fundamental Properties and Emerging Applications in Synthesis and Catalysis

Non-Classical Anionic Naked N-Heterocyclic Carbenes: Fundamental Properties and Emerging Applications in Synthesis and Catalysis
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非经典阴离子裸 N-杂环卡宾:合成和催化中的基本性质和新兴应用

DOI:
10.3390/catal8120620
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发表时间:
2018
期刊:
影响因子:
3.9
通讯作者:
Alex C. Bissember
Alex C. Bissember
中科院分区:
化学3区
文献类型:
--
作者:
M. Leow;Curtis C. Ho;M. Gardiner;Alex C. Bissember

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正在进行的对N-杂环卡宾(NHCS)化学的探索导致了新的NHC亚类的开发和发现,这些亚类偏离了Arduengo的典型的N,N‘-二取代咪唑-2-亚甲基结构。这些系统继续支持和扩大NHC配体在合成和催化中的基础作用。在这方面,质子型NHCS的出现引起了特别的兴趣。这在一定程度上是因为它们应用于选择性地制备独特的分子支架,以及它们前所未有的双功能反应能力,可以在过渡金属催化的过程中加以利用。相比之下,密切相关的阴离子裸NHC的合成应用仍未得到充分探索。有鉴于此,本文着重介绍了非经典阴离子裸NHC的一些有趣的基本性质,并重点介绍了它们在合成和催化方面的最新应用。
Ongoing research exploring the chemistry of N-heterocyclic carbenes (NHCs) has led to the development and discovery of new NHC subclasses that deviate beyond Arduengo’s prototypical N,N′-disubstituted imidazol-2-ylidene-based structures. These systems continue to enable and extend the fundamental role of NHC ligands in synthesis and catalysis. In this regard, the advent of protic NHCs has garnered particular interest. This derives in part from their applications to the selective preparation of unique molecular scaffolds and their unprecedented bifunctional reactivity, which can be exploited in transition metal-catalyzed processes. In comparison, the synthetic applications of closely related anionic naked NHCs remain rather underexplored. With this in mind, this review highlights the interesting fundamental properties of non-classical anionic naked NHCs, and focuses on their emerging applications in synthesis and catalysis.
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