Palladium-catalyzed C–H activation/C–C cross-coupling reactions via electrochemistry
作者:Cong Ma、Chuan-Qi Zhao、Yi-Qian Li、Li-Pu Zhang、Xue-Tao Xu、Kun Zhang、Tian-Sheng Mei
DOI:10.1039/c7cc07429h
日期:——
Palladium-catalyzed C–H activation/C–C cross-couplingreactions have emerged as attractive tools for organic synthesis. Typically, these reactions require stoichiometric chemical oxidants and exogenous ligands to regenerate the palladium catalyst and promote reductive elimination respectively. However, there are significant disadvantages associated with the use of traditional stoichiometric oxidants
Rh(III)-Catalyzed C–H Alkylation of Arenes Using Alkylboron Reagents
作者:He Wang、Songjie Yu、Zisong Qi、Xingwei Li
DOI:10.1021/acs.orglett.5b01232
日期:2015.6.5
alkylation of arenes using commercially available alkyltrifluoroborates is disclosed. Oximes, heteroarenes, azomethines, N-nitrosoamines, and amides are viable directing groups to entail this transformation. The alkyl group in the boron reagent can be extended to primary alkyls, benzyl, and cycloalkyls, and the reaction proceeded with controllable mono- and dialkylation selectivity when both ortho C–H
Diaryliodoniums by Rhodium(III)-Catalyzed CH Activation: Mild Synthesis and Diversified Functionalizations
作者:Fang Xie、Zhipeng Zhang、Xinzhang Yu、Guodong Tang、Xingwei Li
DOI:10.1002/anie.201502278
日期:2015.6.15
Diaryliodonium salts play an increasingly important role as an aryl source. Reported is the first synthesis of diaryliodoniums by rhodium(III)‐catalyzed CH hyperiodination of electron‐poor arenes under chelation assistance. This CI coupling reaction occurred at room temperature with high regio‐selectivity and functional‐group compatibility. Subsequent diversified nucleophilic functionalization of
An efficient RhIII-catalyzed strategy for constructing aryl-heteroaryl derivatives with removable ketoxime ether auxiliaries via direct C–H heteroarylation based on arenes and heteroaromatic boronates has been disclosed. This protocol could tolerate various pyridine, pyrimidine, pyrazole, thiophene, and furan heteroaromatic boronates well, providing the desired products with high reactivities and excellent
Rh(III)-Catalyzed C–H Allylation of Aromatic Ketoximes with Vinylaziridines
作者:Jing-Jing Nie、Zhong-Xia Wang
DOI:10.1021/acs.joc.4c00343
日期:2024.4.19
The Rh(III)-catalyzed reaction of aromatic ketoximes with 2-vinylaziridines affords ortho-allylation products of the phenyl rings of aromatic ketoximes in moderate to excellent yields. The reaction requires 0.5 equiv of NaOAc as a base and occurs under mild conditions. The protocol exhibits ortho-monoallylation selectivity, wide scope of substrates, and good compatibility of functional groups.