Catalytic C-H to C-M (M = Al, Mg) bond transformations with heterometallic complexes.

Catalytic C-H to C-M (M = Al, Mg) bond transformations with heterometallic complexes.
复制标题

催化C-H至C-M(M = Al,Mg)键转换,具有异量化复合物。

DOI:
10.1039/d0sc03695a
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发表时间:
2020-08-17
期刊:
影响因子:
8.4
通讯作者:
Crimmin MR
Crimmin MR
中科院分区:
化学1区
文献类型:
--
作者:
Batuecas M;Gorgas N;Crimmin MR

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C-H官能化是现代催化的基石之一,由于其高效率和原子经济性,仍然是当代感兴趣的话题。在这些反应中,C-H硼化反应,即C-H键到C-B键的转化,由于有机硼试剂作为合成中间体的广泛应用而经历了快速的发展。现在已经很好地理解了机理背景,并且过渡金属硼基或σ-硼烷中间体在这种转变中的作用也有很好的文献记载。这篇简短的评论集中在我们小组和其他人所做的努力,以建立钯和钙催化的C-H金属化方法,采用较重的主族元素(M = Al,Mg)。这些是我们小组首次完成的新的催化反应,我们分别称之为C-H铝化和镁化。不寻常的杂金属配合物已被确定为关键的循环中间体和其独特的反应性的上下文中的C-H官能化的新的催化途径进行了讨论。因此,这篇简短的综述总结了C-H金属化反应领域的最新进展以及这一概念可能带来的新机遇。这一重点集中在最近的努力,建立C-H功能化与主族金属(M =铝,镁)的催化方法。
C–H functionalisation is one of the cornerstones of modern catalysis and remains a topic of contemporary interest due its high efficiency and atom-economy. Among these reactions, C–H borylation, that is the transformation of C–H to C–B bonds, has experienced a fast development because of the wide utility of organoboron reagents as synthetic intermediates. The mechanistic background is now well-understood and the role of transition metal boryl or σ-borane intermediates in this transformation is well documented. This mini-review focuses on efforts made by our group, and others, to establish palladium- and calcium-catalysed methods for C–H metalation employing heavier main group elements (M = Al, Mg). These are new catalytic reactions first accomplished in our group that we have termed C–H alumination and magnesiation respectively. Unusual heterometallic complexes have been identified as key on-cycle intermediates and their unique reactivity is discussed in the context of new catalytic pathways for C–H functionalisation. Hence, this mini-review summarises the recent progress in the area of C–H metalation reactions as well as the new opportunities that may arise from this concept. This highlight focuses on recent efforts to establish catalytic methods for C–H functionalisation with main group metals (M = Al, Mg).
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