Unexpected Nickel Complex Speciation Unlocks Alternative Pathways for the Reactions of Alkyl Halides with dppf-Nickel(0).
Unexpected Nickel Complex Speciation Unlocks Alternative Pathways for the Reactions of Alkyl Halides with dppf-Nickel(0).
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DOI:
10.1021/acscatal.0c02514
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发表时间:
2020-09-18
期刊:
影响因子:
12.9
通讯作者:
Nelson DJ
中科院分区:
文献类型:
--
作者:
Greaves ME;Ronson TO;Lloyd-Jones GC;Maseras F;Sproules S;Nelson DJ
The mechanism of the reactions between dppf-Ni0 complexes and alkyl halides has been investigated using kinetic and mechanistic experiments and DFT calculations. The active species is [Ni(κ2-dppf)(κ1-dppf)], which undergoes a halide abstraction reaction with alkyl halides and rapidly captures the alkyl radical that is formed. The rates of the reactions of [Ni(COD)(dppf)] with alkyl halides and the yields of prototypical nickel-catalyzed Kumada cross-coupling reactions of alkyl halides are shown to be significantly improved by the addition of free dppf ligand.
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影响因子:
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作者:
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DOI:
10.1126/science.aaf7230
发表时间:
2017-04-14
期刊:
Science (New York, N.Y.)
影响因子:
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作者:
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通讯作者:
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