Use of Acylhydrazine- and Acylhydrazone-Type Ligands to Promote CuI-Catalyzed C-N Cross-Coupling Reactions of Aryl Bromides with N-Heterocycles
作者:Liuyi Li、Lei Zhu、Dagui Chen、Xuelei Hu、Ruihu Wang
DOI:10.1002/ejoc.201100112
日期:2011.5
A series of ten acylhydrazine- and acylhydrazone-typeligands were designed and synthesized. Their electronic and steric properties were easily modified and tuned by varying the substituents in the vicinity of the acylhydrazine and acylhydrazone units. The effect of ligands on the catalytic activity of Ullmann reactions was assessed by using a combination of these ligands with CuI. The catalytic system
设计并合成了一系列十个酰基肼和酰基腙型配体。通过改变酰基肼和酰基腙单元附近的取代基,它们的电子和空间性质很容易被修改和调整。通过使用这些配体与 CuI 的组合来评估配体对 Ullmann 反应催化活性的影响。该催化体系对于唑类与芳基和杂芳基溴化物的 C-N 偶联反应非常有效。