A monomeric (trimethylsilyl)methyl lithium complex: synthesis, structure, decomposition and preliminary reactivity studies

A monomeric (trimethylsilyl)methyl lithium complex: synthesis, structure, decomposition and preliminary reactivity studies
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DOI:
10.1039/d1dt03532k
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发表时间:
2021-11-26
影响因子:
4
通讯作者:
Lu, Erli
Lu, Erli
中科院分区:
化学2区
文献类型:
--
作者:
Davison, Nathan;Waddell, Paul G.;Lu, Erli

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单体有机锂 (LiR) 复合物可以增强 Li-C 键反应性,并为大量 LiR 介导的反应提供机制。它们备受追捧,但对有机金属化学家来说仍然是一个合成挑战。在这项工作中,我们报道了单体(三甲基硅基)甲基锂配合物的合成和表征,即(Li(CH2SiMe3)(kappa(3)-N,N',N ''-Me(6)Tren)](1),其中Me(6)Tren是四齿中性胺配体。通过单晶X射线衍射,变温核磁共振波谱和电子吸收光谱全面检查了1的结构。配合物1通过配体 C-H 和 C-N 活化分解产生 Li 酰胺复合物 2。1 的初步反应性研究揭示了 C=O 插入和 C-H 活化反应模式。
Monomeric organolithium (LiR) complexes could provide enhanced Li-C bond reactivity and suggest mechanisms for a plethora of LiR-mediated reactions. They are highly sought-after but remain a synthetic challenge for organometallic chemists. In this work, we report the synthesis and characterisation of a monomeric (trimethylsilyl)methyl lithium complex, namely (Li(CH2SiMe3)(kappa(3)-N,N',N ''-Me(6)Tren)] (1), where Me(6)Tren is a tetradentate neutral amine ligand. The structure of 1 was comprehensively examined by single-crystal X-ray diffraction, variable temperature NMR spectroscopy and electron absorption spectroscopy. Complex 1 decomposes via ligand C-H and C-N activations to produce a Li amide complex 2. Preliminary reactivity studies of 1 reveal C=O insertion and C-H activation reaction patterns.