Catalytic asymmetric Nakamura reaction by gold(I)/chiral N,N'-dioxide-indium(III) or nickel(II) synergistic catalysis.

Catalytic asymmetric Nakamura reaction by gold(I)/chiral N,N'-dioxide-indium(III) or nickel(II) synergistic catalysis.
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金(I)/手性N,N-二氧化铟(III)或镍(II)协同催化的催化不对称中村反应

DOI:
10.1038/s41467-021-23105-z
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发表时间:
2021-05-21
影响因子:
16.6
通讯作者:
Feng X
Feng X
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Hu X;Tang X;Zhang X;Lin L;Feng X

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烯醇和烯醇化物与未活化炔的分子间加成反应被证明是一种简单而有效的碳-碳键形成方法。到目前为止,还没有实现炔与1,3-二羰基化合物的催化不对称形式。本文利用手性N,N ′-二氧化铟(III)或镍(II)刘易斯酸和非手性金(I)π酸的协同活化作用,实现了1,3-二羰基化合物与未活化1-炔的催化不对称分子间加成反应.一系列β-酮酰胺、β-酮酯和1,3-二酮以良好的产率转化为具有四取代手性中心的相应产物,具有良好的e.r.价值观此外,在实验研究的基础上,提出了一个可能的催化循环和过渡态模型来解释反应过程和手性诱导的起源。虽然烯醇和烯醇化物加成到未活化的炔上用于碳-碳键修饰,但催化的不对称炔与1,3-二羰基化合物一直是难以捉摸的。在这里,作者使用手性N,N ′-二氧化铟(III)或镍(II)刘易斯酸和非手性金(I)π-酸的协同活化来实现这一点。
Intermolecular addition of enols and enolates to unactivated alkynes was proved to be a simple and powerful method for carbon-carbon bond formation. Up to date, a catalytic asymmetric version of alkyne with 1,3-dicarbonyl compound has not been realized. Herein, we achieve the catalytic asymmetric intermolecular addition of 1,3-dicarbonyl compounds to unactivated 1-alkynes attributing to the synergistic activation of chiral N,N′-dioxide-indium(III) or nickel(II) Lewis acid and achiral gold(I) π-acid. A range of β-ketoamides, β-ketoesters and 1,3-diketones transform to the corresponding products with a tetra-substituted chiral center in good yields with good e.r. values. Besides, a possible catalytic cycle and a transition state model are proposed to illustrate the reaction process and the origin of chiral induction based on the experimental investigations. Although enols and enolates addition to unactivated alkynes is used for carbon-carbon bond modification a catalytic asymmetric alkyne with 1,3-dicarbonyl compound has been elusive. Here, the authors achieve this using the synergistic activation of chiral N,N′-dioxide-indium(III) or nickel(II) Lewis acid and achiral gold(I) π-acid.”
双金属铑(II)/铟(III)中继催化串联插入/不对称克莱森重排
DOI: 10.1002/anie.201810410
发表时间: 2018-12-10
影响因子: 16.6
作者:
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发表时间: 2009-01-01
影响因子: 4.1
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发表时间: 2008-04-02
影响因子: 15
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结合多功能季鏻盐和银催化,通过顺序迈克尔加成/Conia-ene反应进行不对称环化
DOI: 10.1016/j.tet.2019.03.045
发表时间: 2019-05-03
期刊: TETRAHEDRON
影响因子: 2.1
作者:
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DOI: 10.1021/ol050532q
发表时间: 2005-05-26
期刊: ORGANIC LETTERS
影响因子: 5.2
作者:
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通讯作者: Yang, D