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通过对所提出的基元步骤进行动力学研究来阐明钯-钯双催化过程的反应机理。

Elucidating the reaction mechanism of a palladium-palladium dual catalytic process through kinetic studies of proposed elementary steps.

作者信息

Ivančič Anže, Košmrlj Janez, Gazvoda Martin

机构信息

University of Ljubljana, Faculty of Chemistry and Chemical Technology, Ljubljana, Slovenia.

出版信息

Commun Chem. 2023 Mar 18;6(1):51. doi: 10.1038/s42004-023-00849-x.

DOI:10.1038/s42004-023-00849-x
PMID:36934172
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10024772/
Abstract

In the synergistic dual catalytic process, the kinetics of the catalytic cycles must be balanced for the successful outcome of the reaction. Therefore, the analysis of the kinetics of the independent catalytic cycles is essential for such reactions, as it enables their relational optimization as well as their design. Here we describe an analysis of the mechanism of a catalytic synergistic bimetallic reaction through the experimental study of a palladium-catalysed cross-coupling of aryl halides with terminal alkynes, an example of a monometallic dual catalytic process. The proposed mechanism of the investigated reaction was disassembled into two palladium catalytic cycles and further into elementary reactions, and each step was studied independently. The described mechanistic analysis allowed us to identify the rate-determining step of the catalytic process by comparing the rates of the elementary reactions under similar reaction conditions, balanced kinetics of the palladium catalytic cycles, and also in which step which reagent enters the catalytic cycle and how.

摘要

在协同双催化过程中,为使反应成功进行,催化循环的动力学必须保持平衡。因此,对独立催化循环的动力学进行分析对于此类反应至关重要,因为这有助于对它们进行关联优化和设计。在此,我们通过对钯催化的芳基卤化物与末端炔烃的交叉偶联反应进行实验研究,描述了一种催化协同双金属反应机理的分析方法,该反应是单金属双催化过程的一个实例。所研究反应的 proposed 机理被拆解为两个钯催化循环,并进一步细分为基元反应,且对每个步骤都进行了独立研究。通过比较相似反应条件下基元反应的速率、钯催化循环的平衡动力学,以及哪种试剂在哪个步骤进入催化循环及其方式,所描述的机理分析使我们能够确定催化过程的速率决定步骤。

注

原文中“proposed”一词翻译时前面多了个“proposed”,推测是重复输入错误,正确翻译应该是“所提出的” 。修改后完整译文为:

在协同双催化过程中,为使反应成功进行,催化循环的动力学必须保持平衡。因此,对独立催化循环的动力学进行分析对于此类反应至关重要,因为这有助于对它们进行关联优化和设计。在此,我们通过对钯催化的芳基卤化物与末端炔烃的交叉偶联反应进行实验研究,描述了一种催化协同双金属反应机理的分析方法,该反应是单金属双催化过程的一个实例。所研究反应的机理被拆解为两个钯催化循环,并进一步细分为基元反应,且对每个步骤都进行了独立研究。通过比较相似反应条件下基元反应的速率、钯催化循环的平衡动力学,以及哪种试剂在哪个步骤进入催化循环及其方式,所描述的机理分析使我们能够确定催化过程的速率决定步骤。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/e230aa8f2973/42004_2023_849_Fig11_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/6c404f6fb59b/42004_2023_849_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/b9f31adeda1f/42004_2023_849_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/4e0215b701b5/42004_2023_849_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/8cff44af48db/42004_2023_849_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/573191eccb4a/42004_2023_849_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/9a1b12c73e73/42004_2023_849_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/faa42af4ceda/42004_2023_849_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/f2edc6f1c8b9/42004_2023_849_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/16b9ec2a16ec/42004_2023_849_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/adc536f398c2/42004_2023_849_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/03c4/10024772/e230aa8f2973/42004_2023_849_Fig11_HTML.jpg

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