Electrochemically Enabled Chan–Lam Couplings of Aryl Boronic Acids and Anilines
作者:Ryan P. Wexler、Philippe Nuhant、Timothy J. Senter、Zachary J. Gale-Day
DOI:10.1021/acs.orglett.9b01434
日期:2019.6.21
The Chan–Lamreaction remains a highly utilized transformation for C–N bond formation. However, anilines remain problematic substrates due to their lower nucleophilicity. To address this problem, we developed an electrochemically mediated Chan–Lamcoupling of arylboronicacids and amines utilizing a dual copper anode/cathode system. The mild conditions identified have enabled the preparation of a
Visible-Light-Mediated Chan-Lam Coupling Reactions of Aryl Boronic Acids and Aniline Derivatives
作者:Woo-Jin Yoo、Tatsuhiro Tsukamoto、Shū Kobayashi
DOI:10.1002/anie.201500074
日期:2015.5.26
The copper(II)‐catalyzed aerobicoxidativecoupling reaction between aryl boronic acids and aniline derivatives was found to be improved significantly under visible‐light‐mediated photoredox catalysis. The substrate scope of this oxidative Chan–Lam reaction was thus expanded to include electron‐deficient aryl boronic acids as viable starting materials.
Reductive Molybdenum-Catalyzed Direct Amination of Boronic Acids with Nitro Compounds
作者:Samuel Suárez-Pantiga、Raquel Hernández-Ruiz、Cintia Virumbrales、María R. Pedrosa、Roberto Sanz
DOI:10.1002/anie.201812806
日期:2019.2.11
The synthesis of aromatic amines is of utmost importance in a wide range of chemical contexts. We report a direct amination of boronic acids with nitro compounds to yield (hetero)aryl amines. The novel combination of a dioxomolybdenum(VI) catalyst and triphenylphosphine as inexpensive reductant has revealed to be decisive to achieve this new C−N coupling. Our methodology has proven to be scalable,
Highly Chemoselective Iridium Photoredox and Nickel Catalysis for the Cross-Coupling of Primary Aryl Amines with Aryl Halides
作者:Martins S. Oderinde、Natalie H. Jones、Antoine Juneau、Mathieu Frenette、Brian Aquila、Sharon Tentarelli、Daniel W. Robbins、Jeffrey W. Johannes
DOI:10.1002/anie.201604429
日期:2016.10.10
visible‐light‐promoted iridium photoredox and nickel dual‐catalyzedcross‐coupling procedure for the formation C−N bonds has been developed. With this method, various aryl amines were chemoselectively cross‐coupled with electronically and sterically diverse aryl iodides and bromides to forge the corresponding C−N bonds, which are of high interest to the pharmaceutical industries. Aryl iodides were found to be a more
Synthesis of benzo-γ-sultams via the Rh-catalyzed aromatic C–H functionalization of diazosulfonamides
作者:Zhanhui Yang、Jiaxi Xu
DOI:10.1039/c4cc00250d
日期:——
Diazosulfonamides are first introduced and employed to synthesize 1-aryl-benzo-γ-sultams via Rh-catalyzed intramolecular aromatic C–H functionalization.