Formal β‐C−H Arylation of Aldehydes and Ketones by Cooperative Nickel and Photoredox Catalysis
作者:Kun Liu、Armido Studer
DOI:10.1002/anie.202206533
日期:2022.8
Formal β-C−H (hetero)arylation of aldehydes and ketones via their readily prepared silyl enol ethers has been achieved by dual nickel and photoredox catalysis. This reaction features broad scope and excellent functional group tolerance.
Photoexcited Ni<sup>II</sup>–Aryl Complex-Mediated Giese Reaction of Aryl Bromides
作者:Xian-Chen He、Ke-Rong Li、Jie Gao、Jian-Ping Guan、Hong-Bin Chen、Hao-Yue Xiang、Kai Chen、Hua Yang
DOI:10.1021/acs.orglett.3c01219
日期:2023.6.9
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
开发了芳基溴化物与缺电子烯烃的 Giese 反应,该反应由包含 Ni II络合物和 Ir III光催化剂的双催化剂体系实现。该协议可以容纳各种芳基溴化物和缺电子烯烃,以高达 97% 的产率提供共轭加合物。利用光激发的 (dtbbpy)Ni II (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,从而扩大激发镍催化的化学空间。
CHALK A. J.; MAGENNIS S. A., J. ORG. CHEM. <JOCE-AH>, 1976, 41, NO 7, 1206-1209