C-S cross-coupling of aryl halides with alkyl thiols catalyzed by in-situ generated nickel(II) N-heterocyclic carbene complexes
作者:Fang-Jie Guo、Jing Sun、Zhao-Qing Xu、Fritz E. Kühn、Shu-Liang Zang、Ming-Dong Zhou
DOI:10.1016/j.catcom.2017.02.007
日期:2017.6
C-S cross-coupling of aryl halides with alkyl thiols catalyzed by in-situ generated Ni (II) N-heterocyclic carbene (NHC) complexes is investigated. Good to excellent yields can be obtained for a variety of aryl halides when using 5 mol% of the Ni (II)-NHC catalyst and 1.5 eq. of KOtBu. Both the electronic and steric effects of the NHC ligands on the catalytic performance of Ni (II)-NHC, as well as the
研究了原位生成的Ni(II)N-杂环卡宾(NHC)配合物催化的芳基卤化物与烷基硫醇的CS交叉偶联。当使用5 mol%的Ni(II)-NHC催化剂和1.5 eq。的Ni(II)-NHC催化剂时,对于各种芳基卤化物,可以获得良好或优异的收率。的KO Ť卜。考察了NHC配体对Ni(II)-NHC催化性能的电子和空间效应,以及芳基卤化物对偶合反应性的电子效应。还讨论了Ni(II)-NHC催化偶联反应的机理。