Radical Perfluoroalkylation Enabled by a Catalytically Generated Halogen Bonding Complex and Visible Light Irradiation
作者:Tarannum Tasnim、Calvin Ryan、Miranda L. Christensen、Christopher J. Fennell、Spencer P. Pitre
DOI:10.1021/acs.orglett.1c04139
日期:2022.1.14
chemistry. This report describes the use of a substituted hydroquinone catalyst to promote radical perfluoroalkylation reactions. Mechanistic studies indicate that the reaction is initiated through formation of a visible light-absorbing halogen bonding complex between the hydroquinone catalyst and the perfluoroalkyl halide radical precursor.
perfluoroalkylation of organic compounds is reported. This operationally simple approach occurs under mild conditions producing valuable new C-C bonds. The chemistry is driven by the ability of NCNDs to directly reach an electronically excited state upon light absorption, thereby successively triggering the formation of reactive radical species from simple perfluoroalkyliodides. Preliminary mechanistic
报道了使用富含胺的 N 掺杂碳纳米点 (NCND) 进行有机化合物的光化学自由基全氟烷基化。这种操作简单的方法发生在温和的条件下,产生有价值的新 CC 债券。这种化学反应是由 NCND 在吸收光后直接达到电子激发态的能力驱动的,从而连续触发从简单的全氟烷基碘化物形成反应性自由基物种。还报告了初步的机理研究。
Triarylamines as catalytic donors in light-mediated electron donor–acceptor complexes
作者:Durbis J. Castillo-Pazos、Juan D. Lasso、Ehsan Hamzehpoor、Jorge Ramos-Sánchez、Jan Michael Salgado、Gonzalo Cosa、Dmytro F. Perepichka、Chao-Jun Li
DOI:10.1039/d2sc07078b
日期:——
Recently, photochemistry of ElectronDonor–Acceptor (EDA) complexes employing catalytic amounts of electron donors have become of interest as a new methodology in the catalysis field, allowing for decoupling of the electron transfer (ET) from the bond-forming event. However, examples of practical EDA systems in the catalytic regime remain scarce, and their mechanism is not yet well-understood. Herein
AbstractWe report the visible‐light‐induced trifluoromethylation of arenes and heteroarenes using sodium trifluoromethanesulfinate catalyzed by anthraquinone‐2‐carboxylic acid. This reaction is a metal‐free trifluoromethylation of arenes and heteroarenes catalyzed by a photoredox organocatalyst. Perfluoroalkylated arenes were also produced using sodium perfluoroalkylsulfinates.magnified image
General High-Valent Nickel Metallocycle Catalyst for the Perfluoroalkylation of Heteroarenes and Peptides
作者:Shubham Deolka、Ramadoss Govindarajan、Tatiana Gridneva、Michael C. Roy、Serhii Vasylevskyi、Pavan K. Vardhanapu、Julia R. Khusnutdinova、Eugene Khaskin