Bimetallic Bis-NHC-Ir(III) Complex Bearing 2-Arylbenzo[d]oxazolyl Ligand: Synthesis, Catalysis, and Bimetallic Effects,Organometallics

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Bimetallic Bis-NHC-Ir(III) Complex Bearing 2-Arylbenzo[d]oxazolyl Ligand: Synthesis, Catalysis, and Bimetallic Effects
Organometallics ( IF 2.5 ) Pub Date : 2020-09-22 , DOI: 10.1021/acs.organomet.0c00464
Shuang Huang ₁ , Xi Hong ₁ , He-Zhen Cui ₁ , Bing Zhan ₁ , Zhi-Ming Li ₁ , Xiu-Feng Hou _{1,

2}

Affiliation

Herein, an unprecedented bimetallic bis-NHC Cp*Ir complex 1 bearing 2-arylbenzo[d]oxazolyl and NHC ligands is reported. A significant increase in activity was observed for N-methylation of amines and reduction of aldehydes with MeOH catalyzed by 1 compared to the monometallic analogues (2–11). Under the optimal conditions, it showed to be highly effective in N-methylation of nitroarenes with MeOH as both C1 and H₂ source. Substrates, including aromatic amines, ketones, and nitro compounds with various functional groups, can be well-tolerated. Mechanistic studies and DFT calculation highlight the significance of bimetallic centers cooperativity.

中文翻译：

带有2-芳基苯并[ d ]恶唑基配体的双金属双-NHC-Ir（III）配合物：合成，催化和双金属效应。

在本文中，报道了前所未有的带有2-芳基苯并[ d ]恶唑基和NHC配体的双金属双-NHC Cp * Ir络合物1。观察到活性的增加显著为Ñ胺-methylation和还原醛的用MeOH催化由1相比，单金属类似物（2 - 11）。在最佳条件下，它显示出在以MeOH作为C1和H _{2的情况下}在硝基芳烃的N-甲基化方面非常有效资源。底物，包括具有各种官能团的芳族胺，酮和硝基化合物，可以被很好地耐受。机理研究和DFT计算突出了双金属中心协作性的重要性。

更新日期：2020-10-12

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