Photoexcited NiII-Aryl Complex-Mediated Giese Reaction of Aryl Bromides.
Photoexcited NiII-Aryl Complex-Mediated Giese Reaction of Aryl Bromides.
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DOI：
10.1021/acs.orglett.3c01219
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发表时间：
2023-05
期刊：
影响因子：
5.2
通讯作者：
Xian-Chen He;Keli Li;Jie Gao;J. Guan;Hong-Bin Chen;H. Xiang;Kai Chen;Hua Yang
中科院分区：
文献类型：
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作者：
Xian-Chen He;Keli Li;Jie Gao;J. Guan;Hong-Bin Chen;H. Xiang;Kai Chen;Hua Yang
开发了芳基溴与缺电子烯烃的 Giese 反应，该反应由包含 NiII 络合物和 IrIII 光催化剂的双催化剂系统实现。该方案可以容纳各种芳基溴和缺电子烯烃，以高达 97% 的产率提供共轭加合物。利用光激发 (dtbbpy)NiII(芳基)Br 中间体作为芳基自由基源，可以实现芳基卤化物的这种新型转化，从而扩大了激发镍催化的化学空间。
A Giese reaction of aryl bromides with electron-deficient alkenes was developed, enabled by a dual catalyst system containing NiII complex and IrIII photocatalyst. This protocol could accommodate a variety of aryl bromides and electron-deficient alkenes, delivering the conjugate adducts in up to 97% yield. The utilization of photoexcited (dtbbpy)NiII(aryl)Br intermediate as an aryl radical source allows this novel transformation of aryl halides, thus expanding the chemical space of excited nickel catalysis.