首页> 外文期刊>Chemistry: A European journal >Iridium-catalyzed allylic substitutions with cyclometalated phosphoramidite complexes bearing a dibenzocyclooctatetraene ligand: Preparation of (π-Allyl)Ir complexes and computational and NMR spectroscopic studies
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Iridium-catalyzed allylic substitutions with cyclometalated phosphoramidite complexes bearing a dibenzocyclooctatetraene ligand: Preparation of (π-Allyl)Ir complexes and computational and NMR spectroscopic studies

机译:带有二苯并环辛酸酯二烯配体的环金属化亚磷酰胺络合物的铱催化的烯丙基取代:(π-烯丙基)Ir络合物的制备以及计算和NMR光谱研究

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摘要

(π-Allyl)Ir complexes derived from dibenzocyclooctatetraene and phosphoramidites by cyclometalation are effective catalysts for allylic substitution reactions of linear monosubstituted allylic carbonates. These catalysts provide exceptionally high degrees of regioselectivity and allow the reactions to be run under aerobic conditions. A series of (π-allyl)Ir complexes were prepared and characterized by X-ray crystal structure analyses. An allylic amination with aniline displayed different resting states depending on the presence of a strong base. DFT calculations were carried out on the mechanistic aspects of these reactions. The results suggest that for the (π-allyl)Ir complexes, the formation and reactions with nucleophiles proceed with comparable rates.
机译:通过环金属化作用由二苯并环辛酸酯和亚磷酰胺衍生的(π-烯丙基)Ir配合物是线性单取代的烯丙基碳酸酯的烯丙基取代反应的有效催化剂。这些催化剂具有极高的区域选择性,可在有氧条件下进行反应。制备了一系列(π-烯丙基)Ir配合物,并通过X射线晶体结构分析对其进行了表征。苯胺的烯丙基胺化反应取决于强碱的存在而显示出不同的静止状态。 DFT计算是根据这些反应的机理进行的。结果表明,对于(π-烯丙基)Ir络合物,亲核试剂的形成和反应以相当的速率进行。

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