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。
A vitamin B<sub>12</sub> derivative catalyzed electrochemical trifluoromethylation and perfluoroalkylation of arenes and heteroarenes in organic media
The electrochemical trifluoromethylation and perfluoroalkylation of aromatic compounds mediated by a vitaminB12derivative as a cobalt-based catalyst has been developed. The Co(I) species of a vitaminB12derivative, prepared by controlled-potential electrolysis at −0.8 V vs. Ag/AgCl in methanol, reacted with RfI (Rf = CF3, n-C3F7, n-C4F9, n-C8F17, and n-C10F21) to form a Co–Rf complex. This complex
已经开发了由维生素B 12衍生物作为钴基催化剂介导的芳香族化合物的电化学三氟甲基化和全氟烷基化。维生素B 12衍生物的Co(I)物种是通过在甲醇中于-0.8 V相对于Ag / AgCl的受控电势电解制备的,与R f I(R f = CF 3,n -C 3 F 7,n -C 4 F 9,n -C 8 F 17和n -C 10 F 21)形成Co-R f络合物。该复合物在可见光照射下释放出一个R f基团,然后通过未反应的(杂)芳烃直接与CH官能团直接反应,形成所需的氟代烷基化分子。据我们所知,这是天然来源的维生素B 12催化三价甲基化和芳族化合物作为钴介导的催化剂的全氟烷基化的首次报道。
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