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.
Ligand-free nickel catalyzed perfluoroalkylation of arenes and heteroarenes
作者:Shubham Deolka、Ramadoss Govindarajan、Serhii Vasylevskyi、Michael C. Roy、Julia R. Khusnutdinova、Eugene Khaskin
DOI:10.1039/d2sc03879j
日期:——
A ligand-free, room temperature, Ni-catalyzed perfluoroalkylation of heteroarenes produced a diverse array of polyfluorinated adducts; potential in the late-stage functionalization of drugs and peptides is also demonstrated.
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
DOI:10.1021/acscatal.3c03705
日期:2023.10.6
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。