Abstract To explore high efficiency of the Suzuki-Miyaura reactions, an easily prepared heterogeous palladium precatalysts bearing sterically bulky α-diimine was covalently supported on graphene oxide (GO). The characterization of supported palladium complex was discussed in detail. A simple and efficient protocol for Pd-catalyzed cross coupling was described, which revealed that the bulky α-diimine ligand is crucial to promote the CAr-CAr transformation. This immobilized system provides a straightforward access to a wide range of aryl bromides with excellent functional groups tolerance.

中文翻译：

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大块α-二亚胺钯配合物负载氧化石墨烯作为铃木-宫浦反应的多相催化剂

摘要 为了探索 Suzuki-Miyaura 反应的高效性，一种易于制备的带有空间体积大的 α-二亚胺的多相钯预催化剂共价负载在氧化石墨烯 (GO) 上。详细讨论了负载钯配合物的表征。描述了一种简单有效的 Pd 催化交叉偶联方案，表明庞大的 α-二亚胺配体对于促进 CAr-CAr 转化至关重要。这种固定化系统提供了一种直接访问范围广泛的具有优异官能团耐受性的芳基溴化物。