Copper/Nitroxyl-Catalyzed Synthesis of Pyrroles by Oxidative Coupling of Diols and Primary Amines at Room Temperature
作者:Weiru Fu、Lina Zhu、Shangzhi Tan、Zhengjia Zhao、Xiangzhu Yu、Lianyue Wang
DOI:10.1021/acs.joc.2c01646
日期:2022.10.7
The Cu/ABNO-catalyzed aerobicoxidative coupling of diols and primary amines to access N-substituted pyrroles is highlighted (ABNO = 9-azabicyclo[3.3.1]nonane N-oxyl). The reaction proceeds at roomtemperature with an O2 balloon as the oxidant using commercially available materials as the substrates and catalysts. The catalyst system is characterized by a broad range of substrates and a good tolerance
突出显示了 Cu/ABNO 催化的二醇和伯胺的需氧氧化偶联以获得 N 取代的吡咯(ABNO = 9-氮杂双环 [3.3.1] 壬烷N-氧基)。反应在室温下以 O 2气球作为氧化剂进行,使用市售材料作为底物和催化剂。该催化剂体系的特点是广泛的底物和对敏感官能团的良好耐受性。克级实验证明了该系统的实用性。
General Method for the Amination of Aryl Halides with Primary and Secondary Alkyl Amines via Nickel Photocatalysis
the coupling of electron-rich and electron-poor aryl halides with both primary and secondary alkyl amines. In this study, it is reported that a Ni(II)-bipyridine complex catalyzes efficient C–N coupling of aryl chlorides and bromides with various primary and secondary alkyl amines under direct excitation with light. Intramolecular C–N coupling is also demonstrated. The feasibility and applicability of
Multicomponent reactions to access <i>S</i>-aryl dithiocarbamates <i>via</i> an electron donor–acceptor complex under open-to-air conditions
作者:Yisong Tang、Yougen Cai、Zhiwei Xie、Zishan Gao、Xiaoyun Chen、Jun Yi
DOI:10.1039/d3ob01935g
日期:——
suitable for this strategy. The synthetic utility was further demonstrated by a two-step one-pot multi-component reaction and photo-flow decagram-scale synthesis. Preliminary mechanistic studies suggest that the association of the dithiocarbamate anion with thianthrenium salts formed an electron donor–acceptor complex, which upon excitation with visible light produced an aryl radical via single-electron
C–heteroatom coupling with electron-rich aryls enabled by nickel catalysis and light
作者:Shengyang Ni、Riya Halder、Dilgam Ahmadli、Edward J. Reijerse、Josep Cornella、Tobias Ritter
DOI:10.1038/s41929-024-01160-1
日期:——
Nickel photoredox catalysis has resulted in a rich development of transition-metal-catalysed transformations for carbon–heteroatom bond formation. By harnessing light energy, the transition metal can attain oxidation states that are difficult to achieve through thermal chemistry in a catalytic manifold. For example, nickel photoredox reactions have been reported for both the synthesis of anilines and