Frustrated Lewis Pair Mediated 1,2-Hydrocarbation of Alkynes.

Frustrated Lewis Pair Mediated 1,2-Hydrocarbation of Alkynes.
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沮丧的刘易斯对介导了1,2烷基化的炔烃。

DOI:
10.1002/anie.201705100
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发表时间:
2017-07-24
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Ingleson MJ
Ingleson MJ
中科院分区:
其他
文献类型:
--
作者:
Fasano V;Curless LD;Radcliffe JE;Ingleson MJ

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阻挫刘易斯对(FLP)化学使得能够用N-甲基吖啶鎓盐作为碳刘易斯酸进行炔1,2-加成的罕见实例。该1,2-缩合过程不像在炔合成硼氢化中那样通过协调机制进行,也不像在唯一其他报道的炔1,2-缩合反应中那样通过分子内1,3-氢化物迁移进行。相反,在这项研究中,炔1,2-缩合反应通过一种新的机制进行,该机制涉及炔与碳刘易斯酸基FLP脱炔以形成新的C-C键。随后,发生分子间氢化物转移,其中FLP的刘易斯酸组分充当氢化物穿梭,使得能够进行炔1,2-缩合。
Frustrated Lewis pair (FLP) chemistry enables a rare example of alkyne 1,2‐hydrocarbation with N‐methylacridinium salts as the carbon Lewis acid. This 1,2‐hydrocarbation process does not proceed through a concerted mechanism as in alkyne syn‐hydroboration, or through an intramolecular 1,3‐hydride migration as operates in the only other reported alkyne 1,2‐hydrocarbation reaction. Instead, in this study, alkyne 1,2‐hydrocarbation proceeds by a novel mechanism involving alkyne dehydrocarbation with a carbon Lewis acid based FLP to form the new C−C bond. Subsequently, intermolecular hydride transfer occurs, with the Lewis acid component of the FLP acting as a hydride shuttle that enables alkyne 1,2‐hydrocarbation.
DOI: 10.1002/chem.201604613
发表时间: 2017-01-01
期刊: Chemistry (Weinheim an der Bergstrasse, Germany)
影响因子: --
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