Copper-Catalyzed Oxidative Amination of Benzoxazoles via C−H and C−N Bond Activation: A New Strategy for Using Tertiary Amines as Nitrogen Group Sources
method for oxidative amination of azoles with tertiary aminesviacopper-catalyzed C−H and C−Nbond activation has been developed. This protocol can be performed in the absence of external base and only requires atmospheric oxygen as oxidant. The catalyst system is very simple and efficient, which opens a new way for using tertiary amines as nitrogen group sources for C−Nbondformation reactions.
Pd-PEPPSI-IPent<sup>An</sup> Promoted Deactivated Amination of Aryl Chlorides with Amines under Aerobic Conditions
作者:Fei-Dong Huang、Chang Xu、Dong-Dong Lu、Dong-Sheng Shen、Tian Li、Feng-Shou Liu
DOI:10.1021/acs.joc.8b01205
日期:2018.8.17
We report herein a highly efficient Pd-catalyzed amination by “bulky-yet-flexible” Pd-PEPPSI-IPentAn complexes. The relationship between the N-heterocyclic carbenes (NHCs) structure and catalytic properties was discussed. Sterically hindered (hetero)arylchlorides and a variety of aliphatic and aromatic amines can be applied in this cross-coupling, which smoothly proceeded to provide desired products
我们在此报告了一种由“大体积但还灵活”的Pd-PEPPSI-IPent An复合物进行的高效Pd催化胺化反应。讨论了N-杂环卡宾(NHCs)结构与催化性能之间的关系。可以在该交叉偶联中应用立体受阻的(杂)芳基氯化物以及各种脂肪族和芳香族胺,它们可以顺利进行以提供所需的产物。操作简单的协议强调了在不排除空气和水分的情况下,在温和条件下可快速获得C Ar -N键的形成。
Well‐Defined Allylnickel Chloride/N‐Heterocyclic Carbene [(NHC)Ni(allyl)Cl] Complexes as Highly Active Precatalysts for CN and CS Cross‐Coupling Reactions
作者:María José Iglesias、Auxiliadora Prieto、M. Carmen Nicasio
DOI:10.1002/adsc.201000223
日期:2010.10.9
The roomtemperatureBuchwald–Hartwig amination of heteroaromatic chlorides has been achieved using the sterically bulky allylnickel chloride/N-heterocyclic carbene [(IPr)Ni(allyl)Cl] complex as a well-defined precatalyst. Arylation of aromatic thiols, affording high yields of products under lowcatalystloadings, has also been promoted with the same complex.
Catalyst- and Reagent-Free Electrochemical Azole C−H Amination
作者:Youai Qiu、Julia Struwe、Tjark H. Meyer、João C. A. Oliveira、Lutz Ackermann
DOI:10.1002/chem.201802832
日期:2018.9.3
Catalyst‐ and chemical oxidant‐free electrochemical azole C−H aminations were accomplished via cross‐dehydrogenative C−H/N−H functionalization. The catalyst‐free electrochemical C−H amination proved feasible on azoles with high levels of efficacy and selectivity, avoiding the use of stoichiometric oxidants under ambient conditions. Likewise, the C(sp3)−H nitrogenation proved viable under otherwise