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Effect of Precatalyst Oxidation State in C–N Cross-Couplings with 2-Phosphinoimidazole-Derived Bimetallic Pd(I) and Pd(II) Complexes
Organometallics ( IF 2.8 ) Pub Date : 2021-08-03 , DOI: 10.1021/acs.organomet.1c00315
Erin E. Martinez 1 , Mariur Rodriguez Moreno 1 , Caleb A. Barksdale 1 , David J. Michaelis 1
Affiliation  

We report the catalytic activity of two phosphinoimidazole-derived bimetallic palladium complexes in Pd-catalyzed amination reactions. Our studies demonstrate that the starting oxidation state (Pd(I) or Pd(II)) of the dimeric complex has a significant effect on the efficiency of the catalytic reaction. The corresponding Pd(I) complex shows higher reactivity in Buchwald–Hartwig aminations, while the Pd(II) complex is much more reactive in carbonylative amination reactions. These new dimeric palladium complexes provide good to excellent reactivity and yields in the amination reactions tested.

中文翻译:

催化剂前氧化态对 2-膦基咪唑衍生的双金属 Pd(I) 和 Pd(II) 配合物的 C-N 交叉偶联的影响

我们报告了两种膦基咪唑衍生的双金属钯配合物在 Pd 催化的胺化反应中的催化活性。我们的研究表明,二聚体复合物的起始氧化态(Pd(I)或 Pd(II))对催化反应的效率有显着影响。相应的 Pd(I) 配合物在 Buchwald-Hartwig 胺化反应中表现出更高的反应性,而 Pd(II) 配合物在羰基化胺化反应中表现出更高的反应性。这些新的二聚钯配合物在测试的胺化反应中提供了良好到极好的反应性和产率。
更新日期:2021-08-23
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