Catalytic Use of Low‐Valent Cationic Gallium(I) Complexes as π‐Acids
Catalytic Use of Low‐Valent Cationic Gallium(I) Complexes as π‐Acids
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DOI：
10.1002/adsc.201701081
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发表时间：
2018-02
影响因子：
5.4
通讯作者：
Zhilong Li;G. Thiery;Martin R. Lichtenthaler;R. Guillot;I. Krossing;V. Gandon;Christophe Bour
中科院分区：
文献类型：
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作者：
Zhilong Li;G. Thiery;Martin R. Lichtenthaler;R. Guillot;I. Krossing;V. Gandon;Christophe Bour
首次用低价Ga（I）物种进行了与π-刘易斯酸催化有关的烯烃和炔烃底物的转化。[Ga（I）（PhF）2]+[Al（ORF）4]−和二氯化镓（i. e. [Ga（I）]+[GaCl 4]−）被证明是环异构化、傅-克反应、转移氢化和还原氢化芳基化的有效催化剂。它们的活性相比，更常见的Ga（III）配合物。这项研究表明，即使是容易获得但却被忽视的二氯化镓盐也可以是比镓酸或其他Ga（III）物质更活性的π-刘易斯酸催化剂。
Transformations of alkene and alkyne substrates relevant to π-Lewis acid catalysis have been performed using low-valent Ga(I) species for the first time. [Ga(I)(PhF)2]+[Al(ORF)4]− and gallium dichloride (i. e. [Ga(I)]+[GaCl4]−) proved to be efficient catalysts for cycloisomerizations, Friedel-Crafts reactions, transfer hydrogenations, and reductive hydroarylations. Their activity is compared to more common Ga(III) complexes. This study shows that even the readily available and yet overlooked gallium dichloride salt can be a more active π-Lewis acid catalyst than gallium trichloride or other Ga(III) species.