Mechanism of the carbopalladation of alkynes by aryl-palladium complexes
Mechanism of the carbopalladation of alkynes by aryl-palladium complexes
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DOI：
10.1016/j.jorganchem.2004.05.032
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发表时间：
2004-11-29
影响因子：
2.3
通讯作者：
Jutand, A
中科院分区：
文献类型：
--
作者：
Amatore, C;Bensalem, S;Jutand, A
研究了反式-PhPdI(PPh3)(2) 和EtO2C-CdropCH 之间的反应。这一碳钯化步骤涉及钯催化的与炔烃的多组分反应，产生不寻常的反式加合物 EtO2C-C(PdIL2)=CHPh 1，作为主要顺式加合物 EtO2C-C(PdIL2)=CHPh 2 异构化形成的主要复合物。碳钯化是区域特异性的。通过在碳钯化步骤中生成的乙烯基-钯络合物本身对 EtO2C-CdropCH 进行连续碳钯化，也观察到多碳钯化，从而产生阳离子络合物。 (C) 2004 Elsevier B.V. 保留所有权利。
The reaction between trans-PhPdI(PPh3)(2) and EtO2C-CdropCH has been investigated. This carbopalladation step involved in palladiurn-catalyzed multicomponent reactions with alkynes gives the unusual trans-adduct EtO2C-C(PdIL2)=CHPh 1 as the major complex formed by isomerization of the primary cis-adduct EtO2C-C(PdIL2)=CHPh 2. The carbopalladation was regiospecific. A multicarbopalladation was also observed by successive carbopalladation of EtO2C-CdropCH by the vinyl-palladium complexes themselves generated in carbopalladation steps, leading to cationic complexes. (C) 2004 Elsevier B.V. All rights reserved.