The synthesis and catalytic properties of Ni(II) complexes with the general formula Ni(NHC)[P(OR)3](Ar)Cl are described. These complexes are air-stable and extremely effective precatalysts in the Suzuki-Miyaura cross-coupling reaction. The reaction protocols described allow for the cross-coupling of aryl chlorides and arylboronic acids, employing low catalytic loading, to deliver a large variety of functionalized biaryl compounds. For the coupling of aryl chlorides with N-heterocyclic boronic acids, TBAF was used as an additive to afford nitrogen-containing biaryl products. Overall, these reaction protocols operate at room or mild temperatures and can be applied to a variety of electronically and sterically differentiated coupling partners. Fundamental insights into the mechanism of this reaction, including the proposed formation of the catalytically active Ni(NHC)[P(Oi-Pr)3] and resting state species, are also reported.
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Wenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R ChinaWenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R China
Wang, Zhan-Yong
Ma, Qin-Na
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Wenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R ChinaWenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R China
Ma, Qin-Na
Li, Ren-Hao
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Wenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R ChinaWenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R China
Li, Ren-Hao
Shao, Li-Xiong
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Wenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R China
Zhejiang Normal Univ, Coll Chem & Life Sci, Jinhua 321004, Zhejiang, Peoples R ChinaWenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R China
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Tokyo Univ Sci, Fac Sci, Dept Chem, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, JapanTokyo Univ Sci, Fac Sci, Dept Chem, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan
Mutoh, Yuichiro
Yamamoto, Kensuke
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Tokyo Univ Sci, Fac Sci, Dept Chem, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, JapanTokyo Univ Sci, Fac Sci, Dept Chem, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan