Extension of the Simmons-Smith reaction to metal-carbynes: efficient synthesis of metallacyclopropenes with σ-aromaticity.

Extension of the Simmons-Smith reaction to metal-carbynes: efficient synthesis of metallacyclopropenes with σ-aromaticity.
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DOI:
10.1039/d0sc03215h
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发表时间:
2020-09-03
期刊:
影响因子:
8.4
通讯作者:
Xia H
Xia H
中科院分区:
化学1区
文献类型:
--
作者:
Huang F;Zheng X;Lin X;Ding L;Zhuo Q;Wen TB;Zhang H;Xia H

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Simmons-Smith反应提供了一条将烯烃转化为环丙烷的直接路线,并以类卡宾锌为活性中间体。然而,类锌卡宾从未将亚甲基单元输送到具有金属-碳多重键的底物上。在这里,我们描述了这种类型的反应,通过将经典的类卡宾锌试剂与一系列结构和电子结构不同的金属卡宾结合起来,三元环的结构现在已经被应用于有机金属体系中。用这种方法制备的各种金属环丙烯衍生物是不饱和三元环中具有σ芳香性的罕见例子。这些产物的结构得到了实验观察和理论计算的支持。将Simmons-Smith反应推广到金属-卡宾体系,得到了具有σ芳香性的金属环丙烯。
The Simmons–Smith reaction offers a direct route for conversion of an alkene into a cyclopropane with a zinc carbenoid as the active intermediate. Zinc carbenoids, however, have never delivered a methylene unit to substrates with metal–carbon multiple bonds. Herein, we describe this type of reaction and the construction of three-membered rings has now been applied in organometallic systems by combining classical zinc carbenoid reagents with a range of structurally and electronically diverse metal carbynes. A variety of metallacyclopropene derivatives prepared in this way represent rare examples with σ-aromaticity in an unsaturated three-membered ring. The structures of such products are supported by experimental observations and theoretical calculations. Extending Simmons–Smith reaction to metal-carbyne systems leads to the access of metallacyclopropenes with σ-aromaticity.
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