Direct alkylation of heteroarenes with unactivated bromoalkanes using photoredox gold catalysis
作者:T. McCallum、L. Barriault
DOI:10.1039/c6sc00807k
日期:——
A protocol for direct C-H alkylation of heteroarenes was developed using photoredox catalysis as a mode of activation for unactivated bromoalkanes. Dimeric Au(I) complex, [Au2(dppm)2]Cl2, served as an efficient photocatalyst for this transformation.
Aliphatic C–H Functionalization Using Pyridine <i>N</i>-Oxides as H-Atom Abstraction Agents
作者:Marcel Schlegel、Siran Qian、David A. Nicewicz
DOI:10.1021/acscatal.2c02997
日期:2022.8.19
secondary, and primary C(sp3)–H bonds was achieved by employing an acridinium photoredox catalyst along with readily available pyridineN-oxides as hydrogen atom transfer (HAT) precursors under visible light. Oxygen-centered radicals, generated by single-electron oxidation of the N-oxides, are the proposed key intermediates whose reactivity can be easily modified by structural adjustments. A broad range of
A General Organocatalytic System for Electron Donor–Acceptor Complex Photoactivation and Its Use in Radical Processes
作者:Eduardo de Pedro Beato、Davide Spinnato、Wei Zhou、Paolo Melchiorre
DOI:10.1021/jacs.1c05607
日期:2021.8.11
variety of radical precursors. Excitation with visible light generates open-shell intermediates under mild conditions, including nonstabilized carbon radicals and nitrogen-centered radicals. The modular nature of the commercially available xanthogenate and dithiocarbamate anion organocatalysts offers a versatile EDA complex catalytic platform for developing mechanistically distinct radical reactions